Which is better for beginners, a 12 gauge or a 20 gauge shotgun?

A 20 gauge shotgun is better for beginners because it produces roughly 30-40% less recoil than a 12 gauge, allowing new shooters to develop proper form and confidence without developing a flinch.

Does a 12 gauge shotgun cost more than a 20 gauge shotgun?

No, a 12 gauge shotgun typically costs the same or slightly less than a 20 gauge shotgun because 12 gauge models are produced in higher volumes, though 20 gauge ammunition often costs 10-20% more per shell.

Is a 20 gauge shotgun safer to shoot than a 12 gauge shotgun?

Yes, a 20 gauge shotgun is safer to shoot than a 12 gauge for most individuals because its lower recoil reduces the risk of shoulder injury, muzzle control loss, and developing bad shooting habits.

Can a 20 gauge shotgun use 12 gauge ammunition?

No, a 20 gauge shotgun cannot use 12 gauge ammunition because the 20 gauge shell is smaller in diameter and will slide past the chamber, potentially causing a catastrophic barrel obstruction if fired.

What is the most common beginner mistake when choosing between 12 gauge and 20 gauge?

The most common beginner mistake when choosing between 12 gauge and 20 gauge is selecting a 12 gauge based on power and availability, then developing a flinch from recoil that ruins accuracy and shooting enjoyment.

Are 12 gauge and 20 gauge shotgun shells interchangeable in any situation?

No, 12 gauge and 20 gauge shotgun shells are never interchangeable because the shell diameters differ significantly, and forcing the wrong gauge into a chamber creates a dangerous obstruction that can cause the barrel to explode.

Which gauge is better for hunting small game like rabbits and squirrels?

A 20 gauge shotgun is better for hunting small game like rabbits and squirrels because its lighter payload and tighter pattern at close range preserve more meat while providing sufficient stopping power.

Can I switch from a 12 gauge to a 20 gauge shotgun without changing my shooting style?

Yes, you can switch from a 12 gauge to a 20 gauge shotgun without changing your shooting style, but you must adjust your lead and swing because the 20 gauge shoots lighter loads with slightly different trajectory and velocity.

What is the effective range difference between 12 gauge and 20 gauge shotguns?

The effective range difference between 12 gauge and 20 gauge shotguns is minimal, with 12 gauge reaching 40-50 yards for birdshot and 20 gauge reaching 35-45 yards, though 12 gauge maintains more energy at longer distances.

Difference Between

Difference Between 12 Gauge and 20 Gauge

Written byNex Virox Team

Editorial Team

Reviewed byVarshal Nirbhavane

Senior SEO & Organic Growth Professional · 5+ years

Published: September 8, 202620 min read

Quick answer

The main difference between 12 Gauge and 20 Gauge is that 12 gauge has a larger bore diameter (18.5 mm) and delivers more power, while 20 gauge has a smaller bore (15.6 mm) with less recoil. 12 Gauge is the standard for hunting and self-defense, while 20 Gauge suits smaller shooters and upland birds.

Key takeaways

Core distinction: 12 gauge uses a larger bore diameter than 20 gauge, allowing more shot pellets per shell.
Recoil and control: 12 gauge produces significantly more recoil, while 20 gauge offers lighter kick and faster target reacquisition.
Payload performance: 12 gauge delivers heavier shot loads with greater downrange energy, ideal for large game and waterfowl.
Best-fit use case: 20 gauge excels for upland birds, skeet, and smaller-framed shooters seeking reduced fatigue.
Common decision mistake: Choosing 12 gauge solely for power ignores that modern 20 gauge loads match many hunting scenarios effectively.

Table of Contents17 sections

What Is 12 Gauge?

12 gauge is a shotgun bore size defined by lead ball diameter, measuring 18.5mm or 0.729 inches. It fires a 1.25-ounce payload and dominates hunting, sport shooting, and self-defense. This gauge delivers heavy stopping power with vast ammunition variety.

Definition of 12 Gauge

Technically, 12 gauge means twelve lead balls of bore diameter equal one pound. The actual barrel interior measures 18.5mm across. This standardized imperial measurement creates the world's most popular shotgun platform, balancing manageable recoil against formidable terminal performance across diverse shooting applications.

Key Characteristics of 12 Gauge

Characteristic	What It Means In Practice
Bore Diameter	Measures 18.5mm or 0.729 inches, creating a wide projectile path for substantial energy transfer.
Payload Weight	Standard shells carry 1.25 ounces of shot, though loads range from light 7/8 ounce to heavy 2 ounces.
Recoil Force	Produces 20-35 foot-pounds of recoil energy depending on load, requiring proper mounting technique for comfort.
Effective Range	Delivers lethal patterns to 40 yards with buckshot and 50 yards with slugs, suiting most hunting scenarios.
Ammunition Variety	Offers birdshot, buckshot, slugs, and specialty rounds, making it adaptable for nearly any shooting task.
Action Types	Available in pump, semi-automatic, break-action, and bolt designs, providing options for every preference.
Shell Length	Chambers accept 2.75-inch, 3-inch, and 3.5-inch shells, allowing power level adjustment per situation.
Pattern Spread	Spreads shot roughly one inch per yard of travel, creating forgiving aiming requirements at close range.
Barrel Lengths	Ranges from 18 inches for defense to 32 inches for competition, altering handling and swing characteristics.
Muzzle Velocity	Typical loads travel 1,200-1,500 feet per second, delivering rapid target engagement with flat trajectory.

Common Examples of 12 Gauge

Remington 870 - The iconic pump-action workhorse, trusted by hunters and law enforcement agencies worldwide since 1950.
Mossberg 500 - A rugged, reliable pump shotgun featuring ambidextrous controls and legendary military and police adoption.
Benelli M4 - A semi-automatic tactical shotgun with patented inertia system, serving in multiple military forces globally.
Winchester SXP - A fast-cycling pump shotgun designed for waterfowl hunting with corrosion-resistant synthetic stocks.
Beretta A400 - A premium semi-auto known for soft recoil and reliable cycling across diverse 12 gauge loads.
Stoeger M3000 - An affordable inertia-driven semi-auto offering dependable performance for entry-level shooters.
Browning Citori - An over-under shotgun prized for target shooting and upland game hunting with balanced handling.
Ithaca Model 37 - A classic bottom-ejecting pump design, continually produced for over eight decades.
Kel-Tec KSG - A bullpup pump shotgun holding up to seven rounds in dual tubular magazines for compact firepower.
Saiga-12 - A magazine-fed semi-automatic shotgun based on AK mechanics, offering rapid reloading and customization.

Advantages and Limitations of 12 Gauge

Advantages	Limitations
Delivers devastating stopping power for home defense against human threats at close quarters.	Produces substantial recoil that intimidates novice shooters and causes flinching without proper training.
Provides unmatched ammunition selection from light target loads to heavy magnum hunting shells.	Heavy shells weigh 2-3 ounces each, limiting how many rounds you can comfortably carry afield.
Patterns shot effectively, increasing hit probability on fast-moving game birds and clay targets.	Limited effective range beyond 50 yards forces shooters to use slugs for longer distance accuracy.
Offers versatile platforms including pumps, semis, and over-unders to suit any shooting discipline.	Larger bore increases felt recoil compared to smaller gauges, causing fatigue during extended range sessions.
Readily available ammunition at competitive prices, with target loads costing less than rifle cartridges.	Heavy gun weight of 7-9 pounds becomes tiring during long upland hunts or tactical courses.
Functions reliably with diverse loads from light 7/8 ounce target shells to heavy 3.5-inch magnums.	Loud report exceeds 150 decibels, demanding quality hearing protection to prevent permanent damage.
Widely adopted by military and police forces, proving effectiveness in combat and law enforcement roles.	Magazine capacity limited to 2-5 rounds in most hunting configurations, restricting sustained fire ability.
Excellent for hunting large game like deer and bear when loaded with slugs or heavy buckshot.	Buckshot patterns spread unpredictably beyond 25 yards, risking missed shots or peripheral damage.
Simple manual of arms on pumps and break-actions provides reliable function in adverse conditions.	Barrel length restrictions in some jurisdictions complicate legal ownership for defensive purposes.
Strong aftermarket support offers stocks, sights, and accessories for customization to individual needs.	High recoil aggravates shoulder injuries and makes the platform unsuitable for young or petite shooters.

What Is 20 Gauge?

20 gauge is a shotgun bore size smaller than 12 gauge, with a nominal diameter of 15.6 millimeters. It fires lighter payloads, typically 7/8 to 1 ounce, producing noticeably less recoil. Hunters and sport shooters choose it for upland birds, skeet, and youth shooters needing manageable kick.

Definition of 20 Gauge

20 gauge refers to a shotgun barrel interior diameter derived from lead balls weighing 1/20 of a pound, equaling 0.615 inches. This bore size sits between 28 gauge and 16 gauge in the traditional gauge system. It delivers lower felt recoil and reduced muzzle energy compared to 12 gauge loads.

Key Characteristics of 20 Gauge

Characteristic	What It Means in Practice
Bore diameter	0.615 inches (15.6 mm) across the barrel interior, smaller than 12 gauge's 0.729 inches.
Recoil level	Roughly 30-40% less felt kick than 12 gauge with similar payload weights, aiding accuracy.
Shell length	Standard 2.75-inch and 3-inch magnum shells fit most modern 20 gauge chambers.
Payload weight	Common loads range from 7/8 to 1 ounce of shot, versus 1 to 1.25 ounces in 12 gauge.
Muzzle velocity	Typical factory loads reach 1,200 to 1,400 feet per second, similar to 12 gauge speeds.
Gun weight	Field models often weigh 5.5 to 7 pounds, making them lighter for carry than 12 gauge guns.
Effective range	Delivers clean kills on small game out to 35-40 yards, slightly shorter than 12 gauge.
Pellet count	1 ounce of No. 8 shot holds about 410 pellets, roughly 20% fewer than a 1.125-ounce 12 gauge load.
Ammo availability	Widely stocked in sporting goods stores, though fewer budget options than 12 gauge.
Choke options	Uses standard choke tubes (improved cylinder to full) identical in thread pattern to 12 gauge.

Common Examples of 20 Gauge

Remington 870 Express - A pump-action workhorse available in 20 gauge, popular for upland hunting and home defense.
Beretta A400 Lite - A semi-automatic gas gun in 20 gauge, prized for low recoil in competitive clay shooting.
Browning Citori 725 - An over-under shotgun in 20 gauge, favored by skeet and sporting clays shooters for balance.
Mossberg 500 Bantam - A youth-model pump in 20 gauge, designed with a shorter stock for smaller shooters.
Benelli Montefeltro - An inertia-driven semi-auto in 20 gauge, lightweight for long days chasing pheasants.
Winchester SXP Field - A budget pump 20 gauge, reliable for rabbit and quail hunting in thick cover.
Stoeger M3000 - A semi-automatic 20 gauge, offering three-inch chamber capacity for turkey hunting.
CZ-USA Bobwhite - A side-by-side 20 gauge, classic choice for grouse hunting with double triggers.
Franchi Instinct - An over-under 20 gauge, known for slim fore-end and quick pointing on woodcock.
Savage 555 - A lightweight break-action 20 gauge, weighing under six pounds for high-country hiking.

Advantages and Limitations of 20 Gauge

Advantages	Limitations
Produces 30-40% less recoil than 12 gauge, enabling longer practice sessions without flinching.	Delivers fewer pellets per shell, reducing pattern density at distances beyond 40 yards.
Lighter guns (5.5-7 lbs) carry easier through fields and mountains all day.	Limited heavy-load options for large game like geese or turkey at extended ranges.
Faster target acquisition due to reduced muzzle jump and lighter swing weight.	Smaller shot payloads mean fewer hits on fast-moving crossing targets.
Ideal for novice shooters and youth, promoting proper form without developing a flinch.	Less versatile for waterfowl hunting where 3.5-inch magnum 12 gauge loads dominate.
Uses less lead per shell, lowering cost per box for high-volume clay target practice.	Fewer specialty loads like buckshot or slugs are available compared to 12 gauge.
Better pattern density at close range (under 30 yards) for small birds like quail.	Slower follow-up shot on heavy game due to reduced stopping power.
More comfortable for shooters with smaller frames or those recovering from shoulder injuries.	Resale market is thinner, with fewer used guns listed than 12 gauge models.
Excellent for skeet where targets break easily with 7/8-ounce loads at moderate speeds.	Cannot match 12 gauge's energy on large predators like coyotes beyond 50 yards.
Chambered in both 2.75 and 3-inch, offering flexibility for field and turkey loads.	Heavier 3-inch 20 gauge loads still produce less energy than standard 12 gauge shells.
Lower ammunition weight in a vest, allowing more shells carried for a given load.	Some hunting regulations require 12 gauge minimum for certain migratory birds.

Similarities Between 12 Gauge and 20 Gauge

Shared Aspect	How 12 Gauge and 20 Gauge Are Alike
Shotgun Platform	Both 12 gauge and 20 gauge shells are designed exclusively for shotguns, not rifles or handguns.
Primary Ammunition Role	Both 12 gauge and 20 gauge cartridges fire multiple pellets (shot) or a single slug for hunting and defense.
Common Shell Lengths	Both 12 gauge and 20 gauge are available in standard 2¾-inch and 3-inch magnum shell lengths.
Bore Construction Material	Both 12 gauge and 20 gauge barrels are typically made from steel or aluminum alloys for pressure containment.
Choke System Compatibility	Both 12 gauge and 20 gauge accept interchangeable screw-in chokes (e.g., improved cylinder, modified, full).
Action Types Available	Both 12 gauge and 20 gauge are offered in pump, semi-automatic, break-action, and bolt-action shotguns.
Primary Hunting Use	Both 12 gauge and 20 gauge are used for upland birds, waterfowl, small game, and deer hunting.
Shot Payload Range	Both 12 gauge and 20 gauge typically carry shot payloads between 7/8 ounce and 1¼ ounces per shell.
Shot Size Selection	Both 12 gauge and 20 gauge support shot sizes from #9 birdshot to #00 buckshot for varied targets.
Wad Design	Both 12 gauge and 20 gauge shells use a plastic or fiber wad to separate shot from powder.
Primer Type	Both 12 gauge and 20 gauge use the same 209-style shotgun primers for ignition.
Powder Propellant	Both 12 gauge and 20 gauge rely on smokeless powder as the standard propellant for all loads.
Hull Material	Both 12 gauge and 20 gauge shells are commonly loaded in plastic hulls with brass or steel heads.
Reloading Feasibility	Both 12 gauge and 20 gauge hulls can be reloaded multiple times using standard shotgun reloading presses.
Effective Range	Both 12 gauge and 20 gauge have similar effective ranges of roughly 30 to 50 yards for birdshot.
Muzzle Velocity	Both 12 gauge and 20 gauge typically achieve muzzle velocities between 1,200 and 1,400 feet per second.
Recoil Management Options	Both 12 gauge and 20 gauge can use recoil pads, gas systems, or ported barrels to reduce felt recoil.
Target Shooting Use	Both 12 gauge and 20 gauge are common in trap, skeet, and sporting clays competitions.
Home Defense Role	Both 12 gauge and 20 gauge are viable home defense options with buckshot or slug loads.
Legal Hunting Restrictions	Both 12 gauge and 20 gauge are subject to identical magazine capacity and plug laws for migratory birds.
Seasonal Availability	Both 12 gauge and 20 gauge ammunition is widely stocked year-round at most sporting goods retailers.
Manufacturer Support	Both 12 gauge and 20 gauge are produced by all major ammo makers like Winchester, Remington, and Federal.
Gun Fit Adjustability	Both 12 gauge and 20 gauge shotguns allow adjustable length-of-pull and comb height via shims or stocks.
Safety Mechanisms	Both 12 gauge and 20 gauge shotguns feature identical manual safeties (cross-bolt or tang-mounted).
Cleaning Requirements	Both 12 gauge and 20 gauge require regular bore cleaning with the same solvents, brushes, and rods.
Storage Conditions	Both 12 gauge and 20 gauge shells should be stored in cool, dry places to prevent hull degradation.
Shell Cost Range	Both 12 gauge and 20 gauge target loads cost roughly $8 to $12 per box of 25 shells.
Training Availability	Both 12 gauge and 20 gauge have identical NRA basic shotgun safety and marksmanship courses.
Aftermarket Accessories	Both 12 gauge and 20 gauge support the same aftermarket stocks, sights, slings, and shell holders.
Long-Term Durability	Both 12 gauge and 20 gauge barrels and actions last decades with proper maintenance and moderate use.

12 Gauge or 20 Gauge: Which Should You Choose?

Choose 12 gauge for maximum power and versatility; choose 20 gauge for lighter carry and reduced recoil. The deciding variable is your primary target: heavy game and waterfowl demand 12 gauge, while upland birds, skeet, and smaller-framed shooters favor 20 gauge.

When to Use 12 Gauge

Choose 12 gauge when hunting geese, ducks, turkeys, or deer with slugs, where 3- to 3.5-inch shells deliver 1,400+ ft-lbs of energy. It excels for trap shooting, home defense, and 3-gun competition. Expect 7-8 lbs gun weight and recoil near 30 ft-lbs.

When to Use 20 Gauge

Choose 20 gauge when hunting pheasants, quail, or woodcock, or when introducing youth and smaller-statured shooters to the sport. It suits fast-swinging upland hunts and long walking days, with 5.5-6.5 lbs guns and recoil around 18 ft-lbs. Ammunition costs 10-15% less than 12 gauge.

Common Misconceptions About 12 Gauge and 20 Gauge

Common Myth	The Reality
"20 gauge always kicks less than 12 gauge."	With identical shot charge and velocity, 12 gauge and 20 gauge recoil nearly equally; gun weight and load choice matter more than bore size.
"12 gauge is only for deer and turkey hunting."	12 gauge handles waterfowl, upland birds, slugs, buckshot, and clay targets; 20 gauge suits small game and skeet with lighter loads.
"20 gauge cannot kill a deer ethically."	20 gauge with a 3-inch slug or buckshot delivers lethal energy to 100 yards, matching 12 gauge performance in most hunting scenarios.
"12 gauge has no advantage over 20 gauge in self-defense."	12 gauge offers wider pellet spread and heavier payloads per shell, but 20 gauge with buckshot remains a viable home-defense choice.
"20 gauge is only for youth and small-framed shooters."	Many adult shooters prefer 20 gauge for reduced fatigue during long upland hunts; it is a legitimate primary gauge, not a training tool.
"12 gauge shells are always more expensive than 20 gauge."	12 gauge target loads often cost less per box due to mass production; 20 gauge premium hunting ammo frequently costs more per round.
"20 gauge has shorter effective range than 12 gauge."	With modern steel shot and tight chokes, 20 gauge matches 12 gauge range to 40 yards; beyond that, 12 gauge retains more energy.
"12 gauge is too powerful for beginner shooters."	12 gauge with low-recoil target loads (7/8 oz at 1200 fps) produces less kick than many 20 gauge heavy magnum loads.
"20 gauge cannot shoot slugs accurately."	20 gauge rifled slug barrels deliver 2-inch groups at 100 yards, comparable to 12 gauge; sabot slugs excel in both gauges.
"12 gauge is the only choice for waterfowl hunting."	20 gauge with 3-inch steel shot (1-ounce loads) effectively takes ducks and geese at 30-40 yards, especially with improved choke.
"20 gauge has fewer ammunition options than 12 gauge."	20 gauge offers birdshot, buckshot, slugs, and target loads from every major maker, though 12 gauge has more specialty tactical rounds.
"12 gauge causes more meat damage on small game."	Using #6 or #7.5 shot, both 12 gauge and 20 gauge produce similar pellet patterns; shot size, not gauge, determines meat destruction.
"20 gauge is not suitable for home defense."	20 gauge with #3 buckshot penetrates 12-16 inches in ballistic gel, meeting FBI standards while reducing overpenetration risk through walls.
"12 gauge always patterns better than 20 gauge."	Pattern quality depends on choke, barrel length, and shell quality; a 20 gauge with a tight choke can out-pattern a loose-patterning 12 gauge.
"20 gauge is a dying caliber with limited future support."	20 gauge remains the second-best-selling shotgun gauge globally, with new loads and guns released annually by Beretta, Browning, and Remington.
"12 gauge is too heavy to carry for a full day of hunting."	Modern 12 gauge autoloaders weigh 6.5-7.5 pounds, similar to 20 gauge pumps; weight difference is often less than half a pound.
"20 gauge cannot cycle reliably in semi-automatic shotguns."	Modern 20 gauge autoloaders like the Benelli M2 and Beretta A400 cycle light loads down to 1-ounce at 1200 fps without malfunctions.
"12 gauge is illegal for hunting in some regions."	No US state bans 12 gauge for hunting; some European countries restrict bore sizes, but 12 gauge remains legal in all 50 states.
"20 gauge has no advantage in clay target sports."	20 gauge reduces recoil fatigue during 100-target rounds; many competitive skeet shooters use 20 gauge for the entire event.
"12 gauge is always more versatile than 20 gauge."	20 gauge handles everything from quail to turkeys with proper loads; 12 gauge only adds heavier payloads for geese or large buckshot.
"20 gauge cannot shoot 3.5-inch shells, limiting its power."	No 20 gauge offers 3.5-inch shells, but 3-inch 20 gauge loads (1-1/4 oz) match 2-3/4-inch 12 gauge magnum performance.
"12 gauge is more reliable in extreme cold weather."	Both gauges function identically in freezing conditions; lubrication and action type, not bore size, determine cold-weather reliability.
"20 gauge is only for bird hunting, not for predators."	20 gauge with #4 buckshot or a 3-inch slug effectively takes coyotes and foxes at close to moderate range (under 50 yards).
"12 gauge has no recoil difference from 20 gauge with same load."	Physics dictates that same payload and velocity produce identical recoil; gun weight and stock design, not gauge, change felt kick.
"20 gauge is harder to find in stores than 12 gauge."	Major retailers stock 20 gauge in every category; during ammo shortages, 20 gauge often remains available when 12 gauge shelves empty.
"12 gauge is too loud for indoor shooting ranges."	Both gauges produce 140-160 dB; hearing protection is mandatory for either, and 20 gauge does not offer a meaningful noise reduction.
"20 gauge cannot handle heavy steel shot for geese."	20 gauge 3-inch shells with BBB or T steel shot (1-1/8 oz) effectively take Canada geese at 35 yards with proper choke selection.
"12 gauge is the only gauge used by military and law enforcement."	While 12 gauge dominates tactical use, some agencies issue 20 gauge breaching rounds for reduced collateral damage in urban operations.
"20 gauge is a beginner's gauge that shooters outgrow quickly."	Many seasoned hunters and competitive shooters choose 20 gauge permanently for its balance and handling; it is not a stepping-stone gauge.

Conclusion

Difference Between 12 Gauge and 20 Gauge comes down to power versus handling. The 12 gauge delivers heavier payloads and more recoil, ideal for waterfowl and large game. The 20 gauge offers lighter weight and less kick, perfect for upland birds and new shooters. Choose 12 gauge for maximum stopping power; choose 20 gauge for all-day comfort.

FAQs on Difference Between 12 Gauge and 20 Gauge

What is the main difference between 12 gauge and 20 gauge shotguns?: The main difference between 12 gauge and 20 gauge shotguns is the bore diameter, with 12 gauge measuring 18.5mm and 20 gauge measuring 15.6mm, which directly affects payload capacity and recoil.
Which is better for beginners, a 12 gauge or a 20 gauge shotgun?: A 20 gauge shotgun is better for beginners because it produces roughly 30-40% less recoil than a 12 gauge, allowing new shooters to develop proper form and confidence without developing a flinch.
Does a 12 gauge shotgun cost more than a 20 gauge shotgun?: No, a 12 gauge shotgun typically costs the same or slightly less than a 20 gauge shotgun because 12 gauge models are produced in higher volumes, though 20 gauge ammunition often costs 10-20% more per shell.
Is a 20 gauge shotgun safer to shoot than a 12 gauge shotgun?: Yes, a 20 gauge shotgun is safer to shoot than a 12 gauge for most individuals because its lower recoil reduces the risk of shoulder injury, muzzle control loss, and developing bad shooting habits.
Can a 20 gauge shotgun use 12 gauge ammunition?: No, a 20 gauge shotgun cannot use 12 gauge ammunition because the 20 gauge shell is smaller in diameter and will slide past the chamber, potentially causing a catastrophic barrel obstruction if fired.
What is the most common beginner mistake when choosing between 12 gauge and 20 gauge?: The most common beginner mistake when choosing between 12 gauge and 20 gauge is selecting a 12 gauge based on power and availability, then developing a flinch from recoil that ruins accuracy and shooting enjoyment.
Are 12 gauge and 20 gauge shotgun shells interchangeable in any situation?: No, 12 gauge and 20 gauge shotgun shells are never interchangeable because the shell diameters differ significantly, and forcing the wrong gauge into a chamber creates a dangerous obstruction that can cause the barrel to explode.
Which gauge is better for hunting small game like rabbits and squirrels?: A 20 gauge shotgun is better for hunting small game like rabbits and squirrels because its lighter payload and tighter pattern at close range preserve more meat while providing sufficient stopping power.
Can I switch from a 12 gauge to a 20 gauge shotgun without changing my shooting style?: Yes, you can switch from a 12 gauge to a 20 gauge shotgun without changing your shooting style, but you must adjust your lead and swing because the 20 gauge shoots lighter loads with slightly different trajectory and velocity.
What is the effective range difference between 12 gauge and 20 gauge shotguns?: The effective range difference between 12 gauge and 20 gauge shotguns is minimal, with 12 gauge reaching 40-50 yards for birdshot and 20 gauge reaching 35-45 yards, though 12 gauge maintains more energy at longer distances.