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Competition, Tactics & Training
Gun Club/Range Talk
The "No Steel Ammo" Rule at Indoor Ranges...
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<blockquote data-quote="Nightops" data-source="post: 1462211" data-attributes="member: 11373"><p>You need the lead, or something else compressible, to let the bullet compress or swage into the barrel, that makes it seal against the rifling and not let all your gasses blow past. Lead just happens to work well, because it is cheap, and dense. Steel cores have a thin steel penetrator in the center, and are then surrounded by lead. If the entire core was steel, you would end up with a much lighter projectile than a lead one of the same dimensions. The jacket is there to prevent the lead from fouling up the barrel. Un-jacketed lead bullets would gum up a high velocity barrel really quick. Copper makes a good jacket as it has natural lubricity (a.k.a. self lubricating). If copper is too expensive at the time, or in too short of a supply, manufacturers will use a mild soft steel jacket and plate it in a thin layer of copper to get a mostly acceptable result. Thus the copper washed steel jackets, and cupro-nickel jackets.</p></blockquote><p></p>
[QUOTE="Nightops, post: 1462211, member: 11373"] You need the lead, or something else compressible, to let the bullet compress or swage into the barrel, that makes it seal against the rifling and not let all your gasses blow past. Lead just happens to work well, because it is cheap, and dense. Steel cores have a thin steel penetrator in the center, and are then surrounded by lead. If the entire core was steel, you would end up with a much lighter projectile than a lead one of the same dimensions. The jacket is there to prevent the lead from fouling up the barrel. Un-jacketed lead bullets would gum up a high velocity barrel really quick. Copper makes a good jacket as it has natural lubricity (a.k.a. self lubricating). If copper is too expensive at the time, or in too short of a supply, manufacturers will use a mild soft steel jacket and plate it in a thin layer of copper to get a mostly acceptable result. Thus the copper washed steel jackets, and cupro-nickel jackets. [/QUOTE]
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The "No Steel Ammo" Rule at Indoor Ranges...
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