Looked in my Hornady manual and it doesn't advise how much one should crimp. I'm loading 44mag 240gr Xtp with imr 4227. I just loaded 10 at minimum charge to get the gun on paper and the case is just a little rounded into the canelure. I posted a pic in my crushing 44 case thread and someone said it's too much but it looks comparable to my 45-70 factory rounds crimp.