I crimped my 450NE and 500/450NE for a while then discovered that no crimp was alot more consistant. Try a few of each and IMO you'll stay away from crimping. Even with the recoil you'll see that they won't change length. Remember this isn't a box magazine rifle. Not all the rules apply.


"When you see that in order to produce, you need to obtain permission from men who produce nothing; when you see that money is flowing to those who deal not in goods, but in favors; you may know that your society is doomed." Ayn Rand