Steel vs Bismuth vs Tungsten Shot for Waterfowl

Density is the whole argument

Every difference between these three materials follows from one number: how much a pellet weighs for its size. A denser pellet of the same diameter is heavier, so it carries more energy further and penetrates better; equivalently, a denser pellet can be smaller and still hit as hard, which means you fit more of them into the same payload. Density buys you either energy or pattern density, and in practice a bit of both.

Published figures put HEVI-Shot's tungsten pellets at 12 g/cc, which is denser than lead ever was. Bismuth sits between steel and lead. Steel is the lightest of the three, which is exactly why the 1991 lead ban pushed every shot-size recommendation up two sizes: a steel pellet needed to be bigger to do what a lead pellet did.

The clearest industry illustration of the conversion is in the design of HEVI-Metal Xtreme, which stacks 30 percent tungsten pellets over steel in one shell and deliberately loads the tungsten three shot sizes smaller than the steel, specifically so both layers hit with matching effect downrange. The published pairings are No. 6 tungsten over No. 3 steel and No. 4 tungsten over No. 1 steel. That is a manufacturer stating the density conversion in its own product.

So the honest frame for this whole decision is: density is a range purchase. If your shots are inside decoying distance, you are paying for something you will not use. If they are not, it is the only thing that fixes the problem. Our what size shot for ducks and geese guide covers the pellet-size half of the same question.

Steel: the default, and usually correct

Steel is the cheapest approved non-toxic shot and the one nearly everyone should be shooting. It is also the one that has had thirty years of engineering thrown at its weaknesses, which is why modern steel loads do not shoot like 1992 steel loads.

Velocity is where steel makers compete, because speed partly offsets low density. Kent publishes 1,550 to 1,560 fps for Fasteel 2.0; Federal publishes 1,450 fps for standard 3-inch 1 1/4 ounce Black Cloud and 1,635 fps for the 1 1/8 ounce BB High Velocity loading; Speed-Shok publishes 1,450 fps in 1 1/4 ounce and 1,550 fps in 1 1/8 ounce. More speed means more energy at the target and a shorter lead, at the cost of recoil — and that cost is real: the fastest steel in a class is also the sharpest-kicking for a given payload.

Pellet shape is the other steel lever. Federal publishes Black Cloud as 40 percent FLITESTOPPER pellets with a raised cutting ring mixed with 60 percent round steel; Winchester publishes Blind Side 2 as six-sided Hex Steel, which the maker claims gives tighter patterns and harder hits. Kent publishes precision-ground, zinc-plated round shot with corrosion-resistant nickel-plated case heads. Whether a cut or faceted pellet outperforms a round one in your gun is exactly the kind of claim to test on paper rather than accept.

Steel's limits are two. Downrange energy: no steel load matches bismuth or tungsten for energy per pellet, whatever shape the pellets are. And barrel compatibility: steel is hard, and older barrels and some fixed chokes are not rated for it.

Bismuth: for older guns and fixed chokes

Bismuth exists for a specific and real problem. Steel shot is hard enough that firing it through a barrel not rated for it risks damage, and that rules out a lot of older guns, some fixed-choke barrels and most vintage doubles. Bismuth is softer than steel and denser, so it is both barrel-friendly and better-performing than steel per pellet.

Boss publishes 1,350 fps for its standard 12-gauge bismuth loads in payloads of 1 1/4, 1 3/8 and 1 1/2 ounce. Note the velocity: slower than any steel load above, because bismuth does not need speed to carry energy. Boss also copper-plates its bismuth, and publishes the reason — bismuth's tendency to fragment on impact, which the plating process is designed to address. That is a genuine and well-documented weakness of the material and it is worth knowing which bismuth loads do something about it.

Boss also publishes a blended option, Wicked Blend, in 3-inch and 3 1/2-inch 12 gauge at 1 1/4 and 1 1/2 ounce: No. 1 bismuth over BB steel, or No. 4 bismuth over No. 2 steel, both at 1,450 fps. The blend logic is the same as the tungsten blends — put the dense material where it earns something and fill the payload with steel.

Before you shoot steel through an old gun, confirm the barrel's rating with the manufacturer. Do not take advice from a forum, this page included, as clearance to do it. The cost of being wrong is a barrel.

Tungsten and TSS: for range you actually use

Tungsten-based shot is the densest material available and the most expensive. HEVI-Shot publishes its pellets at 12 g/cc, and the whole product proposition is energy at distance. TSS — tungsten super shot — is the extreme version of the same idea, and it is the reason very small pellets can kill very large birds.

Pure tungsten shells cost enough that the market has largely settled on blends. HEVI-Metal Xtreme is the pattern: 30 percent tungsten over 70 percent steel, so the dense pellets lead the pattern and the steel fills it, published at 1,450 fps with 1 1/4 ounce in 12 gauge and 1,350 fps with 1 1/16 ounce in 20 gauge, in 3-inch shells, behind a Federal rear-breaking FliteControl Flex wad. That is a load built for geese at the edge of range, and HEVI-Shot's own positioning says as much.

The case against tungsten is simple and worth stating plainly: if your geese decoy inside 35 yards, plain steel does that job, and the tungsten premium is money spent on range you are not using. The case for it is equally simple: if you hunt late-season birds that will not come inside 45 yards, nothing else closes that gap. Our best goose hunting loads page ranks the specific shells across all three materials.

All three are legal; lead is not

Lead shot has been prohibited for hunting waterfowl and coots nationwide in the United States since 1991. Only shot types approved by the U.S. Fish & Wildlife Service may be used, and the approved list — which covers steel, bismuth-tin, various tungsten alloys and others, along with rules on shot coatings — is codified at 50 CFR 20.134. The Service publishes a plain-language summary here.

Read the current regulation rather than a remembered version of it: the approved-types list has been amended over the years, and a specific alloy being sold is not by itself proof it is approved for waterfowl. Separately, states and individual wildlife management areas frequently impose rules stricter than the federal floor, including narrower approved-shot lists and shot-size caps. Check your state agency and the area regulations for the specific property you hunt, every season. See waterfowl hunting season guide for how the federal frameworks and state rules fit together.

Which to buy

Buy steel if you have a modern steel-rated gun and your birds decoy. That is most hunters, most of the time, and the money saved on shells buys decoys, which will do more for your season than shot material will. Choose on velocity and payload rather than on pellet-shape marketing, and pattern what you buy.

Buy bismuth if your gun is not rated for steel, or if you want more per-pellet energy without a tungsten price. Prefer a plated bismuth and know why: fragmentation is the material's documented weakness, and Boss publishes copper plating as its answer to it.

Buy a tungsten blend if your shots are genuinely long — late-season honkers that will not finish, big open water, pass shooting. Blends are the sane form of the purchase because the dense material goes where it matters and steel fills the rest of the payload.

Do not buy density to fix a pattern problem. If birds are getting hit and not falling inside normal range, the likely causes are choke and pattern rather than shot material, and the fix is a morning at paper with the choke you actually hunt. Shot material cannot repair a pattern that is not centered. For the rest of the shooting system, see best duck hunting shotguns, 12 gauge vs 20 gauge and 3-inch vs 3.5-inch shells for goose hunting, and best choke for duck hunting with steel shot for the tube end of that same pattern problem.