I have a Lipsey's 45 lc/acp convertible, medium frame,SS, 4.63 barrel. I am loading .452 Missouri Bullet Co., 255 gr SWC over 7.5 Unique. Shot about 24 rds other day with minor leading in cylinder throats with barrel looking clean and shiny. Cleaned fasirly easy with hoppy #9 and lewis lead remover. This situation sound about the norm for a 45 colt? No throat work done, is all stock. triker