R.P. cleans it up alot! With a West coast 180gr bullet, five grains of AA#two improved, and a WW S.R.P. I'm averaging 937fps out of my 6" barrel and NO stress symptoms. I'm tring this powder as it was recomened by a really top rated notch gun builder. KURT https://accurate2520powder25790.blog2news.com/20682105/the-pistol-primers-diaries