Originally Posted by
USSR
IMHO, 4227 is one of the best powders for heavy bullet revolver loads. One thing you will notice is it leaves behind bits of unburned powder in your bore. The other thing you will notice is exceptional accuracy. Most of the guys who complain about it not being clean burning make no mention of what accuracy they obtained, so I can only surmise that cleanliness trumps accuracy for them. My personal load in .45 Colt consists of a 265gr SWC HP powered by 22 grains of 4227 and a magnum primer.
Don