AR15 450 bushmaster follower 30rdGImag

AR15 30 round GI mag follower for 450 bushmaster.
The magazine is a 30 round so it is curved. The 450 bushmaster rounds don't like the curve. I had to sand down the rear edge a little to get it to finally somewhat work and be able to load 7 rounds. Then it hits the curve and doesn't want to take any more.
* cycling the action in an AR15 I found no problem. I have not test fired with it yet.