Not (obviously) JB, but I've seen articles by Brian Pearce and Ross Seyfried that stated that modern .45 Colt brass like Federal and Starline is as strong as .44 Mag brass. Pearce has written a good bit about the strength of various .45 revolvers and includes suitable loads with his articles. IIRC, he has said that in weaker guns like the N frames, the .45 Colt can be loaded safely to the same pressure levels as the .45 ACP. I suggest you look up his stuff for the specifics and data. Strong brass ain't going to help if the gun isn't strong enough to begin with. If you need a magnum, get one.
