Glad to hear you ran it out past 400 in testing. How big a deal is the crimping stuff on these? I really have no idea how the case capacity will work out for pressure on the 22 Creed with this projo. What Powder would you recommend starting with, and seating depth? This is a short action Terminus Apollo with AI Magyes the 73 Ah is my favorite, i have seen the 73 HH and 75AH tumble when pushed to hard in 7t up 3700 plus, the Ah was designed to fix this problem! iv shot it out to 700 yds with good results!