I had a stainless 4-5/8" barreled .45 colt Blackhawk back in the days before Ruger offered the Super Blackhawk in that barrel length. My standard load was a 270 grain SWC from an RCBS mold backed by 25 grains of Win 296. Recoil was .. peppy. Accuracy was very good. After Ruger added the short barrel to the .44 magnum line I traded the .45 Colt. Later on I had a couple of short barreled Blackhawks that were blued. Those had shorter front sights than the stainless gun did and I was unable to get them sighted in with anything beyond Cowboy loads so they got sold.
Anyway, as to the original question, the Redhawk is stronger than any other .45 Colt I know of other than one built for .454 use that has a .45 Colt extra cylinder fitted ala Freedom Arms. There are no .45 Colt factory loads I would have any hesitation to shoot in a Redhawk.
Tom
