Repeated mention is made of heavier bullets creating more recoil and I don't dispute that, but in actually test firing bullets I bought as 255 grain and actually weighing 265, the Lyman minimum load is fine and way less push back and muzzle rise than a full spec load rated at 860 fps. I also had occasion to need to borrow 5 rounds to finish a match and was offered 160 gr loads that were tame enough but not dramatically so. I prefer a bit of recoil which also helps in recocking a full length hammer. I don't know if the shorter COL of 160 gr would run okay in the rifle. I am inclined to use that weight bullet in any 45 CS I might try. The 160 in a 45 Colt case could be pushed well over the velocity limit for pistols (1000 fps), so there is that to keep in mind.
I am going over all these ideas because I recently acquired a like new JM Marlin Cowboy Competition in 45 Colt and now have a set of guns in 45 Colt to shoot as an alternative. I used them in one match so far. I like a certain amount of recoil, often preferring to shoot my magnums when at the range. I am in Cattle Baron and don't need to be the fastest shooter on the street. My guns are 5 1/2" barrels, so are a bit less susceptible to recoil and muzzle flip.