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The 45 long Colt is an easy cartridge for which to reload. I have two recipes and that is all I need. Both use a 260 grain cast bullet (Lyman 454424, 454190) or similar. The first recipe is the original, fill the case with black powder and seat the lubed bullet. I have a revolver similar to yours with a 5 1/2" barrel. I get 900 fps with black powder. The next load is the same bullet but I use Unique to get the same velocity.
Either load will anchor the Ohio white tailed deer, with plenty left over so be careful.
I have other loads but those two get 99% of my attention.
Good luck and enjoy your revolver.
Kevin