I've found that soft lead works better, but then I use cast 225 grn RN bullets for my Gold Cup. The 45 ACP dosn't need velocity so soft cast bullets dont lead that much.
As a side note: For those who enjoy pin shooting, you should try "post shootes" where a 4X4 post is set up, and you have a two man team. The time stops when you cut the post in two.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071