A few years ago, I found myself with a pair of S&W Mountain Guns chambered in 45 Colt. Shipped the cylinder of one of them to TK Custom and requested they mill it to accept moon-clipped .45 ACP rounds, chamfer chamber mouths, etc. It is the easiest loading 45 ACP revolver I've ever owned and is reasonably accurate with 200 grain ACPs. It's still a tack-driver with "Long" Colts loaded with Venturino's old W-231 load, as is the 45 Colt that remains unaltered. I have since traded for a Mountain Gun chambered in .45 ACP. It is extremely accurate with cast 200 grainers in front of middle-of-the-road loads of Trail Boss, near manual-minimum loads of WST, and near-max loads of Titegroup. Together, they are my favorite revolvers,