Just for grins....
Last evening I took my `86 Miroku out to see just how fast I could push pure lead (PC'd) through it:
https://i.postimg.cc/gc3x1b4K/1886-Gould-Fast.jpg
https://i.postimg.cc/L5f0VQBD/Lyman-...-Pure-Lead.jpg
post-1: Mirror bore on dry patch
post-2: Being "Extra Light," also fast/heavy enough to be headache material off a bench.