All my cast projectiles are made from pure lead for my black powder shooting, 50cal, 45/70, 38/55, pure lead bumps up into the bore and seals, it is easy to clean, accuracy is fine, I do realise for faster fps the lead should be harder and if using black powder there is no need to harden the lead, I think it just adds to the probs, gas checks on faster loads, I protect my bases with a beer coaster wad.
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