Birdshot vs Buckshot vs Slug

Three completely different projectiles sold in identical-looking boxes at wildly different prices. Here is what each one is for, and why cost per shell is the only honest way to compare them.

AmmoSpotter Research Desk By AmmoSpotter Research Desk
Published Reviewed October 2026 8 min read
Birdshot vs Buckshot vs Slug

A shotgun is the most versatile firearm most people own, and that versatility comes entirely from the ammunition. The gun does not change. What comes out of it changes completely.

Three families, three jobs, and a price spread between them that almost nobody looks at correctly — because shotgun ammunition is packaged in a way that makes the comparison nearly impossible on a shelf.

Birdshot: many small pellets, and the cheapest thing you can shoot

Dozens to hundreds of small pellets, sized by number — larger numbers mean smaller pellets. #8 and #9 for clays, #6 and #7.5 for upland birds, #4 through BB and T for waterfowl and larger birds.

What it does: delivers a wide, dense pattern of small projectiles that lose energy fast. That is exactly right for a clay target or a bird, and exactly wrong for anything requiring penetration.

What it costs: less than anything else you can put through a shotgun, because it is produced in enormous volume for the shooting sports. It is also the segment where bulk buying actually pays — target loads are the only shotgun ammunition regularly sold in 250-shell flats.

Cheapest 12 Gauge Shells Tracked Today

Prices updated Oct 10, 2026
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The home defense question. Birdshot is a recurring recommendation among people who have not thought it through, usually on over-penetration grounds. The problem is that shallow penetration is not a safety feature when the projectile needs to reach something. Most serious instruction points at buckshot for defensive use.

Buckshot: a few large pellets, and the worst price illusion in the market

A small number of large pellets. Sizing runs backwards from birdshot: 000 is the largest, then 00, 0, 1, 2, 4.

00 buckshot is the default defensive load — roughly nine pellets of about .33 inch in a standard 2.75-inch 12 gauge shell. Each pellet carries meaningful energy on its own.

What matters when buying it:

  • Pattern, not marketing. Buckshot patterns differently out of every barrel and choke combination. Pattern your specific gun at the distance you would actually use it.
  • Reduced-recoil loads are worth considering. Less recoil means faster follow-up shots.
  • Buffered and plated loads are designed to hold tighter patterns at distance, at a price premium.

What it costs: several times birdshot per shell — and here is the trap. Buckshot is usually sold in 5- or 10-shell boxes while target loads come in 25-shell boxes. A $9 box of buckshot and a $9 box of target loads sit on the same shelf at the same price and differ by a factor of five per trigger pull. The full breakdown, including which loads are worth the premium, is in best 12 gauge buckshot for home defense.

12 Gauge Price Index

Live · Oct 10, 2026
Market floor / round
$0.360
Market average
$1.009
Lowest box price
$6.09
30-day trend
▲ 3.4%
Compare all 12 Gauge deals by cost per round →

That market average sits well above the floor precisely because defensive and specialty loads pull it upward while bulk target loads anchor the bottom. A single average price is far less useful than knowing which segment you are shopping in.

Slugs: one projectile, and a category that is not what the name suggests

One solid projectile. This is a shotgun behaving like a low-velocity, very large-bore rifle.

Foster (rifled) slugs are designed for smoothbore barrels. Common, inexpensive, effective inside about 75 yards.

Sabot slugs are designed for rifled shotgun barrels. Substantially more accurate at range, substantially more expensive per shell. Only worth buying if you have a rifled barrel.

Slugs are the smallest of the three segments in our catalog by a wide margin — we track fewer than fifty distinct 12 gauge slug listings against many hundreds of birdshot loads. Worth knowing before you plan around finding them locally.

Something else the data shows that a spec sheet will not: the expensive end of the slug segment is not premium hunting ammunition. It is breaching rounds, rubber baton less-lethal loads and frangible law-enforcement training slugs. If you sort slugs by price and buy from the top expecting a better deer load, you will get something built for an entirely different job.

What they are for: deer in shotgun-only jurisdictions, large or dangerous game at short range, and any situation demanding penetration a pellet cannot deliver. How slugs stack up against the rifle cartridges people use for the same animal is covered in best deer hunting ammo by caliber.

The comparison

BirdshotBuckshotSlug
ProjectilesDozens to hundreds8–27 typicallyOne
Effective range~40 yds~40 yds (patterned)75–150 yds
PenetrationShallowDeepDeepest
Primary useClays, birdsDefense, large gameDeer, bear, range
Typical pack size25–2505–255–25
Cost per shellLowestHighHigh

Why cost per shell matters more here than anywhere else

Shotgun ammunition is the worst-labelled category in the market.

Of the 12 gauge listings we track, roughly five in six are 25-shell boxes. The rest are scattered across 5-, 10-, 15-, 100-, 200- and 250-shell packs, and only about thirty of them are full 250-shell flats. So the shelf gives you one dominant format that looks like a standard unit and is not one, plus a long tail of packages that cannot be compared to it by eye.

Four different quantities, four price points, no way to compare them by looking. Convert everything to cost per shell and the picture inverts constantly — the cheap-looking 25-round box is frequently worse value than the flat.

Cost Per Round Calculator

The only number that matters when comparing ammo. Shipping included.

Your true cost per round
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This is the same discipline we apply to every cartridge on the site, and it is the whole reason our rankings look different from everyone else's. See cost per round explained for the method, and how AmmoSpotter ranks ammunition for what we will and will not claim.

Does 20 gauge actually cost more than 12 gauge?

This is repeated everywhere as settled fact. Our data says it is mostly wrong.

20 Gauge Price Index

Live · Oct 10, 2026
Market floor / round
$0.368
Market average
$0.922
Lowest box price
$7.92
30-day trend
▲ 2.2%
Compare all 20 Gauge deals by cost per round →

Compare that index against the 12 gauge one above. The target-load floors sit within a fraction of a cent of each other, and the 20 gauge market average is currently the lower of the two — not because 20 gauge is cheap, but because the 12 gauge catalog carries far more premium waterfowl and specialty ammunition dragging its average upward.

The real 20 gauge penalty is selection, not price. We track more than three times as many 12 gauge listings as 20 gauge ones, and the gap is worst exactly where it hurts: defensive buckshot and slugs are both thin in 20 gauge, while target loads are plentiful. For a recoil-sensitive shooter that is still a trade worth making — recoil that makes you flinch costs more accuracy than payload buys — but plan on ordering rather than finding what you want on a shelf.

Non-toxic shot is where the money actually goes

The single largest price driver in shotgun ammunition is not brand, shell length or pellet count. It is whether the payload is lead.

Waterfowl regulations require non-toxic shot in many areas, and steel, bismuth and tungsten-blend loads cost far more to produce than lead. We track several hundred non-toxic 12 gauge listings, and they own the entire top of the price range: the most expensive 12 gauge shells in our catalog are ten-shell boxes of tungsten predator loads running over $170 — more than $17 per trigger pull, roughly fifty times the market floor.

Steel sits far below tungsten and bismuth in the middle. If you hunt waterfowl, this is the line item worth watching over a season, and the forces that move it — component costs, import policy, demand spikes — are laid out in why ammo prices move.

What to actually buy

For clays: whatever #8 or #7.5 target load is cheapest per shell in a flat. There is no meaningful performance difference between the major brands at clay distances, and this is the one shotgun purchase where buying purely on price is correct. It is also the ammunition you should be shooting the most of — the case for volume over gear is in how many rounds does it take to get good.

For home defense: 00 buckshot, patterned in your gun, ideally reduced recoil. Buy two boxes — one to pattern, one to keep.

For deer: slugs matched to your barrel. Rifled barrel means sabots; smoothbore means Fosters. Skip the top of the price list unless you have read the box.

For birds: shot size matched to the bird and the regulations. Many waterfowl areas require non-toxic shot, which changes both the product and the price by a large multiple.

Bulk Shotgun Shells - 100 Rounds and Up

Prices updated Oct 10, 2026
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The one habit that fixes all of this

Stop reading box prices. A shotgun shelf is four incompatible package sizes pretending to be a price comparison, and the only way through it is to divide by the number of shells every single time.

Do that consistently and the decisions get simple: buy target loads by the flat, buy buckshot two boxes at a time and pattern it, buy slugs that match your barrel, and treat non-toxic shot as its own budget line.

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Frequently Asked Questions

What is the difference between birdshot, buckshot and slugs?+
Payload. Birdshot is dozens to hundreds of very small pellets that spread quickly and lose energy fast, which is what you want for clay targets and birds. Buckshot is a small number of large pellets - typically eight to twenty-seven - each carrying meaningful energy on its own. A slug is a single solid projectile, which turns the shotgun into a short-range, very large-bore rifle. Same gun, three completely different things coming out of it.
Is birdshot good for home defense?+
It is a recurring recommendation and a poor one. The argument is that small pellets are less likely to pass through walls, but shallow penetration stops being a safety feature the moment the projectile needs to reach something that matters. Nearly all serious defensive shotgun instruction points at buckshot instead. Birdshot's job is clays and birds, and it does that job better than anything else at a fraction of the cost.
What do shot size numbers actually mean?+
For birdshot, higher numbers mean smaller pellets: #9 and #8 for clays, #7.5 and #6 for upland birds, #4 down through BB and T for waterfowl and larger game. Buckshot runs on its own scale that goes the other direction at the top - 000 is the largest, then 00, 0, 1, 2 and 4. The two scales are unrelated, which is why '#4 birdshot' and '#4 buckshot' are wildly different products.
Do I need a rifled barrel to shoot slugs?+
Not for the common ones. Foster or rifled slugs are designed to be fired from smoothbore barrels and are the inexpensive, widely available option. Sabot slugs are designed for rifled shotgun barrels and are substantially more accurate at distance and substantially more expensive per shell. Buying sabots for a smoothbore, or Fosters for a rifled barrel, wastes most of what you paid for.
Is 20 gauge more expensive than 12 gauge?+
Not at the cheap end, which surprises people. Our live index shows the 12 and 20 gauge target-load floors within a fraction of a cent of each other, and the 20 gauge market average currently sits below 12 gauge because the 12 gauge catalog carries far more premium waterfowl and specialty loads. The real 20 gauge penalty is selection, not price - we track more than three times as many 12 gauge listings.
Why are some shotgun shells over ten dollars each?+
Non-toxic shot. Waterfowl regulations require non-lead payloads in many areas, and tungsten, bismuth and tungsten-blend loads cost many times what lead costs to produce. The most expensive 12 gauge shells we track are ten-shell boxes of tungsten predator and waterfowl loads running over $170 a box. That is the same gauge, the same gun, and roughly fifty times the cost per trigger pull of a target load.
Topics 12 Gauge 20 Gauge Shotguns Cost Per Round Home Defense Hunting

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AmmoSpotter Research Desk

About the author

AmmoSpotter Research Desk

Price & Ballistics Research

The AmmoSpotter Research Desk analyzes live retail pricing across every ammunition, firearm and accessory listing we track. Recommendations here are ranked against real cost-per-round data pulled daily from the retailers we monitor - not against manufacturer marketing copy.

  • ✓Tracks 180,000+ live product listings across 6 retailer feeds
  • ✓Records price history on every listing, every day
  • ✓Cost-per-round methodology applied to all ammunition rankings
  • ✓No product is ranked without a verifiable in-stock retail price
  • ✓Affiliate relationships never influence rankings

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