In my relatively brief experience with shooting .45 ACP/AR ammunition in a revolver I have found that at least with my Brazilian jacketed bullets shoot better, the rifling is very shallow. I suppose you could size bullets to better match the barrel but for my purposes I have found it to be much easier to simply purchase plated bullets by Rainier. I have found the 185 and 200 gr. bullets shoot best in mine and I load plated bullets to speeds just under what I would use with full on jacketed Hornady XTPs. My Model of 1955 revolvers will shoot cast bullets much better than plated due to their deeper rifling, same is true with Model 25's. I much prefer shooting Auto Rim cartridges in any of my revolvers chambered for .45ACP, once I made the switch I never looked back. I am sitting on a stockpile of .45ACP ammunition for the few .45 pistols I own and do not reload for that caliber, only Auto Rim.