My Cart ()
Back Close
Filters
Now Shopping by
  1. Caliber
    12 Gauge
  2. Shot Size
    00 (Buck)
  3. Material
    Brass
Brand
  1. Estate Cartridge Company 1 item
  2. Federal Ammunition 5 items
  3. Fiocchi Ammunition 1 item
  4. Hornady 4 items
  5. Panzer Arms 1 item
  6. Sellier & Bellot 1 item
  7. Winchester 1 item
Caliber
  1. 12 Gauge 14 items
  2. 410 Gauge 1 item
Shot Size
  1. 00 (Buck) 14 items
  2. 000 (Buck) 1 item
  3. 4 (Buck) 2 items
  4. 4 (Lead) 1 item
  5. 5 (Lead) 1 item
  6. 6 (Lead) 3 items
  7. 7 (Steel) 2 items
  8. 7.5 (Lead) 20 items
  9. 8 (Lead) 12 items
  10. 8/9 (Steel) 1 item
  11. 9 (Lead) 1 item
  12. 9 (Steel) 2 items
  13. BB & 7 (Steel) 1 item
  14. BB (Lead) 1 item
  15. Rifled Slug 8 items
  16. Sabot Slug 3 items
Material
  1. Brass 14 items
Bullet Weight
  1. 1 1/2 Oz. 2 items
  2. 1 1/8 Oz. 1 item
  3. 1 3/16 Oz 1 item
Muzzle Velocity
  1. 1140 FPS 1 item
  2. 1145 FPS 1 item
  3. 1210 FPS 1 item
  4. 1214 FPS 1 item
  5. 1250 FPS 1 item
  6. 1290 FPS 1 item
  7. 1300 FPS 1 item
  8. 1325 FPS 3 items
  9. 1350 FPS 1 item
  10. 1600 FPS 3 items
Applications
  1. Defensive 7 items
  2. Hunting 7 items
Round Count
  1. 5 4 items
  2. 10 7 items
  3. 25 3 items
Inventory
  1. In Stock 7 items
  2. Out of Stock 7 items
Customer Rating
  1. 5
    8 items
  2. 4
    & up     12 items
  3. 3
    & up     13 items

Shotgun Ammo for Sale

Shop Shotgun Ammo Online — 12 Gauge, 20 Gauge, .410 & More

Looking for the best shotgun ammo for hunting, sport shooting, or home defense? GunMag Warehouse makes it easy to buy shotgun ammo online at unbeatable prices, with a huge selection of gauges and brands in stock and ready to ship. From 12 gauge and 20 gauge ammo to hard-to-find .410 shotgun shells, we’ve got you covered.

Quickly narrow down our selection by gauge, brand, load type, or application — whether you’re stocking up for a hunting trip, searching for bulk shotgun ammo, or need the best home defense shotgun ammunition.

We carry a full lineup of trusted names like Rio Shotshells, Panzer Arms, Federal Ammunition, and Hornady with options for buckshot, birdshot, and slugs in a variety of gauges. Popular choices include:

  9. Winchester Defender 2.75" 12 Gauge Ammo Copper Plated 00 Buckshot 10 Shells
    Winchester Defender 2.75" 12 Gauge Ammo Copper Plated 00 Buckshot 10 Shells
    Out of stock
    (3)
    $24.99 $18.99 Save $6.00 ($1.90 per round)
  10. Fiocchi Defense Dynamics 2.75" 12 Gauge Ammo 00 Buckshot 10 Shells
    Fiocchi Defense Dynamics 2.75" 12 Gauge Ammo 00 Buckshot 10 Shells
    Out of stock
    (1)
    $12.99 $9.99 Save $3.00 ($1.00 per round)
  11. Estate Cartridge Company 2.75" 12 Gauge Ammo 00 Buckshot 25 Shells
    Estate Cartridge Company 2.75" 12 Gauge Ammo 00 Buckshot 25 Shells
    Out of stock
    (7)
    $39.99 $24.99 Save $15.00 ($1.00 per round)
  13. Federal Power-Shok Low-Recoil 2.75" 12 Gauge Ammo 00 Buckshot 5 Shells
    Federal Power-Shok Low-Recoil 2.75" 12 Gauge Ammo 00 Buckshot 5 Shells
    Out of stock
    (2)
    $9.99 $8.99 Save $1.00 ($1.80 per round)
  14. Federal Power-Shok Maximum 2.75" 12 Gauge Ammo 00 Buckshot 5 Shells
    Federal Power-Shok Maximum 2.75" 12 Gauge Ammo 00 Buckshot 5 Shells
    Out of stock
    $9.99 $7.99 Save $2.00 ($1.60 per round)
Filter

Frequently Asked Questions

What Does Gauge Mean in Shotguns?

Like caliber, gauge refers to the size of the firearm’s chamber and ammunition, but it works slightly differently. Whereas caliber measures the bore’s size in inches, shotgun gauge shows how many lead balls with the same diameter as the bore it would take to equal one pound of lead.

A higher gauge means a smaller bore, as a pound of lead divided into 20 would result in smaller pieces than dividing a pound into 12. As such, 12 gauge shotguns have a larger barrel than 20 gauge shotguns, and by the same token, 12 gauge shells are bigger in diameter.

The one notable exception is .410 bore, which follows the same conventions as caliber. Shotguns chambered in .410 bore have a .41-inch barrel diameter, and this is the only shotgun ammo size designated this way.

What’s the Best Shotgun Ammo for Home Defense?

Most shooters would agree that the 12 gauge is the best shotgun ammo for home defense. In addition to being widely available, it offers a good balance between stopping power and controllability.

Larger options will send more lead toward your target, which may increase their effectiveness, but it can also mean more collateral damage. Some argue that the smaller 20 gauge works well for self-defense because it produces less recoil, but keep in mind that it will deliver a smaller payload.

When shopping for defensive ammo, you should also keep shot size in mind. Regardless of your gauge, 00 buckshot is a solid option that balances stopping power with a manageable spread.

What Is the Best Shotgun Ammo for Hunting?

The best shotgun ammo for hunting depends on what kind of game you’re after. As you might expect, the ever-popular 12 gauge is a good all-around pick, ideal for medium-sized game like deer. Bird hunters often prefer smaller 28 gauge or 20 gauge shotshells, as they’ll kick less but are still enough to take down smaller prey.

If you’re hunting squirrels or other small game, .410 bore may be the way to go. These are also a favorite for taking care of pests like snakes and moles without causing much damage to the surrounding area.