Solution: The Hornady Die set 546349: I emailed Hornady, their solution was to give them a call. So this morning I called their technical line and this is what the conversation went like: Dyjital: Having an issue with die set 546349 and crimp. Hornady Rep: .300 Blackout, this die set has a 90" roll crimp ring, so unless you are using a cannelure bullet you will start to damage the shoulder. Dyjital: That explains it, I was making sure I wasn't crazy, thanks for your time. Hornady Rep: Even in these dies there will be more than enough neck tension to hold without a crimp in an AR. Dyjital: Thank you sir and that answers that question. Problem solved. So that's the solution to these die sets. No cannelure = no crimp. Even then with cannelure you can only add a little because of the 90* crimp ring. If more crimp is needed one must use a taper or a Lee FCD/Lyman etc made for this in that capacity. Total call time (including prompts and the 15 seconds I waited for somebody to answer - I was 1 in the queue) was 3 minutes.