If all of you read my original post. My loading manual shows them to be using a barrel with a 1 in 14 inch twist. The starting load of 4895 is one of the loads I used and it key holed. This is also noted in my reloading book as the accuracy load. It does not key hole in the universal receiver, why would it key hole in my 1 in 14 inch barrel. I may try to up the powder just a little, faster may make it spin more and stop the key hole. In the reloading book, with the starting loads I've got it going about 3,000 fps, and the max is about 3,500 fps. Please understand that with lighter bullets this barrel is as nice a shooting rifle as I have seen in a while, Its no big deal that it won't shoot the heavy bullets. I just do not understand why this is going on.