I am using Ramshot TAC powder and loading to starting spec load in the Ramshot book for a 75 grn HPBT because that is the closest I could come to in load spec for the A-Max bullet. The printed COL is 2.260 which allows it to be loaded in a standard AR15 mag. The Hornady manual states a COL of 2.390 for the 75 A-Max bullet and 2.260 for the 75 HPBT. The A-max is a longer bullet and would require it to be seated very deep and crimped very high up the Ogive of the bullet in order to achieve a COL of 2.26. Question: Won't this cause the pressure to spike? Is it safe to crimp that far up the Ogive? The Ramshot response was that it is fine to load that deep in order to obtain a COL of 2.260. I have some years of reloading experience that consists of success's and some "Boo Boo's". I have also learned to follow my gut on some things and to double and triple check my work and information. So I am throwing this out to the forum while waiting for a more precise response from Ramshot.