A lot of people pick a 20 gauge for home defense because it kicks less than a 12. That’s a smart reason. The next question is which shell to load. 20 gauge ballistic gel tests can help, but there are far fewer of them than for 12 gauge, and they’re easy to misread. This guide shows you how to read them and what to look for on the box.
Bulk Ammo Vault has not run its own gel tests, and we don’t quote depth or spread numbers for any shell. What we can share is how shotgun gel testing works, what changes the results, and how the 20 gauge defense and slug loads we carry compare on build and listed velocity.
Is 20 Gauge Good for Home Defense?
For many people, yes. A 20 gauge throws a lighter payload than a 12 gauge, so recoil is lower. Lighter guns are easier for smaller shooters to handle. Faster follow-up shots and more practice often matter more than a bigger shell.
The trade-off is payload. A 20 gauge buckshot shell holds fewer or smaller pellets than a 12 gauge 00 Buck load. That’s why shell choice matters so much.
Laws on self-defense vary. Check your state and local rules.
How Gel Tests Judge Shotgun Shells
Testers use calibrated 10% ordnance gelatin, chilled and checked with a steel BB. For buckshot, they count pellets in the block and measure how deep each one went. For slugs, they measure depth, expanded width and recovered weight.
The FBI protocol sets a window of 12 to 18 inches of penetration for handgun duty ammo. Shotgun testers often use it as a benchmark for each pellet or slug. It gives you a shared yardstick when comparing loads.
20 Gauge Buckshot: What to Look For
Pellet size
Common 20 gauge buckshot sizes are #3 and #2 Buck. #2 pellets are a bit larger than #3. Larger pellets carry more mass each and tend to go deeper. Smaller pellets give you more of them per shell. In gel results, watch how many pellets reach a useful depth, not just how many hit the block.
Birdshot is a different story
Birdshot pellets are much smaller and lose speed fast. That’s why most trainers favor buckshot or slugs for defense.
Wads and patterns
Some shells use wads that keep pellets together longer. The Federal Personal Defense 20 Gauge #2 Buck FliteControl uses Federal’s FliteControl wad. Tighter patterns help keep every pellet on target at room distances.
20 Gauge Buckshot We Carry
| Load | Bullet | Payload | Shell | Velocity |
|---|---|---|---|---|
| 20 Gauge #2 Buckshot | Copper-plated lead buckshot | #2 Buck (10 pellets) | 2-3/4 in. | 1,325 fps |
| Sellier and Bellot 20 Gauge Buckshot #2 Buck, 2-5/8″ | Lead buckshot | #2 Buck | 2-5/8 in. | 1,181 fps |
| Winchester Defender 20 Gauge #3 Buckshot, 20 Pellets | Copper-plated lead buckshot | #3 Buck (20 pellets) | 2-3/4 in. | 1,145 fps |
| Winchester Defender 20 Gauge Buckshot #3 Buck | Copper-plated lead buckshot | #3 Buck (20 pellets) | 2-3/4 in. | 1,145 fps |
| Remington Express Buckshot 20 Gauge #3 Buck, 20 Pellets | Lead buckshot | #3 Buck (20 pellets) | 2-3/4 in. | 1,200 fps |
| Winchester Super X Buckshot 20 Gauge #3 Buck, 20 Pellets | Lead buckshot | #3 Buck (20 pellets) | 2-3/4 in. | 1,200 fps |
| 20 Gauge #3 Buckshot | Copper-plated lead buckshot | #3 Buck (20 pellets) | 2-3/4 in. | 1,175 fps |
| Federal Power Shok Buckshot 20 Gauge 2-3/4″ #3 Buck, 20 Pellets | Lead buckshot | #3 Buck (20 pellets) | 2-3/4 in. | 1,200 fps |
| 20 Gauge 3 Inch Buckshot | Copper-plated lead buckshot | #2 Buck (18 pellets) | 3 in. | 1,100 fps |
| Federal 20 Gauge Buckshot | Copper-plated lead buckshot | #2 Buck (18 pellets) | 3 in. | 1,100 fps |
The Federal FliteControl #2 Buck lists 1,325 fps with 10 pellets. The Winchester Defender #3 Buck lists 1,145 fps with 20 copper-plated pellets. Plated pellets hold their shape better, which can help them fly true and push deeper.
The 3-inch shells, like the Federal Vital-Shok 3 Inch #2 Buck, carry 18 pellets. They need a gun with a 3-inch chamber. Never fire a longer shell than your gun is marked for.
For a full rundown, see our 20 gauge buckshot ammo guide.
20 Gauge Slugs: Reading the Results
A slug is one big projectile. In gel, it acts more like a rifle bullet. Expect deep tracks and high retained weight from most designs. Inside a home, that depth also means a slug can go through walls. Think about what’s behind your target.
| Load | Bullet | Payload | Shell | Velocity | Energy |
|---|---|---|---|---|---|
| 20 Gauge Hollow Point Slug | Hollow point rifled slug | 3/4 oz slug | 2-3/4 in. | 1,600 fps | not listed |
| Hornady 20 Gauge Slugs | FTX polymer tip sabot slug | n/a slug | 2-3/4 in. | 1,798 fps | 1,800 ft-lbs |
| Brenneke 20 Gauge Slugs | Rifled slug | 3/4 oz slug | 2-3/4 in. | 1,476 fps | not listed |
| Remington 20 Gauge Slugs | Rifled slug | 5/8 oz slug | 2-3/4 in. | 1,580 fps | not listed |
| Hornady Custom Lite 20 Gauge 250 Grain Polymer Tip Sabot Slug, 2-3/4″ | Polymer tip sabot slug | n/a slug | 2-3/4 in. | 1,600 fps | 1,421 ft-lbs |
The Hornady SST 250 Grain Sabot Slug lists 1,798 fps and 1,800 ft-lbs. Most sabot slugs work best in rifled barrels, though this one’s listing says rifled or smooth bore. The Federal Vital-Shok 3/4 oz Hollow Point Slug lists 1,600 fps and works in rifled or smooth bores. The Brenneke K.O. 3/4 oz Slug lists 1,476 fps.
Hunting with slugs? Our 20 gauge slug ammo guide covers deer loads in detail.
What Throws Off 20 Gauge Gel Tests
- Distance: pellets spread and slow as range grows.
- Choke: a tight choke changes pattern size. Note what choke the tester used.
- Clothing: heavy layers can slow small pellets.
- Barrel length: short defense barrels may give a bit less speed than test barrels.
- Few shots: one test shell proves little. Look for several.
Picking Your Shell
- Start with a defense-focused #2 or #3 Buck load in 2-3/4 inch.
- Pattern it at the distances inside your home.
- Run a full box through your gun to check function.
- If you hunt with the same gun, check your state’s rules on buckshot and slugs for each species.
Shop 20 Gauge Shells
Browse all 20 gauge shotgun shells, or go straight to 20 gauge buckshot and 20 gauge slugs. Let 20 gauge ballistic gel results guide your short list, and let your patterning board make the final call.
Frequently Asked Questions
Is 20 gauge good for home defense?
For many shooters, yes. A 20 gauge has less recoil than a 12 gauge, which helps with control and follow-up shots. Use buckshot or slugs rather than birdshot, and pattern your gun at home distances. Laws vary, so check your state and local rules.
What is the best buckshot size for 20 gauge?
Common 20 gauge defense sizes are #3 and #2 Buck. #2 pellets are larger and carry more mass each. #3 loads usually hold more pellets. Pattern both in your shotgun and pick the one that keeps every pellet on target at your distances.
Can I use 3 inch shells in my 20 gauge?
Only if your shotgun’s chamber is marked for 3-inch shells. A gun marked 2-3/4 inch should fire only 2-3/4 inch shells or shorter. Firing a longer shell than the chamber allows can cause dangerous pressure. Check the barrel stamp.
Do sabot slugs work in a smooth bore?
Sabot slugs are designed for rifled barrels, which spin the sabot for accuracy. In a smooth bore they often group poorly. Some loads list both barrel types, so check the box. Foster-style rifled slugs are usually the pick for smooth bores.
