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An open single-cavity bullet mold and a closed two-cavity mold. A cast bullet is made by allowing molten metal to solidify in a mold.Most cast bullets are made of lead alloyed with tin and antimony; but zinc alloys have been used when lead is scarce, and may be used again in response to concerns about lead toxicity.
Hard cast lead alloys have been utilized which are resistant to expansion and deformation of any kind. These hard cast varieties may be more brittle than softer alloys, but within their limitations are capable of exhibiting greater weight retention at velocities up to around 2500 feet per second.
Cast bullets as cast (left), with gas check (center) and lubricated (right). A gas check is a gasket type component of firearms ammunition. Gas checks are used when non-jacketed bullets are used in high pressure cartridges. The use of a gas check inhibits the buildup of lead in the barrel and improves accuracy. [1]
A full metal jacket (FMJ) bullet is a small-arms projectile consisting of a soft core (often lead) encased in an outer shell ("jacket") of harder metal, such as gilding metal, cupronickel, or, less commonly, a steel alloy. A bullet jacket usually allows higher muzzle velocities than bare lead without depositing significant amounts of metal in ...
Hard cast: a hard lead alloy intended to reduce fouling of rifling grooves (especially of the polygonal rifling used in some popular pistols). Benefits include simpler manufacture than jacketed bullets and good performance against hard targets; limitations are an inability to mushroom and subsequent over-penetration of soft targets.
Recoil from the cast lead bullet load shown below is almost nonexistent. For plinking or light game hunting, 400-grain (26 g) pistol bullets are a candidate, but they generate almost as much recoil as 500-grain (32 g) bullets. The advantage of 400-grain (26 g) bullets is that they are inexpensive and will open up quickly on light game.
In August, the US Food and Drug Administration greenlit a new maker of an old drug used for the most severe cases of lead poisoning, ending a shortage and stopping the need for importation of the ...
Hard cast may refer to: a hard lead alloy intended to reduce fouling of rifling grooves, used as bullet material; Orthopedic cast, a shell that encases a limb; Metal casting, a process in which a liquid metal is delivered into a mold of the intended shape