Originally Posted By: SqueezeI crimp all of my AR-15 ammo, except for P-Dog ammo. I have had bullet set back happen, especially on the 6.8s, used for deer hunting. And the 458 SOCOM, scares me at the thought of bullet set back. So I crimp.
The only ARs I don't crimp for are a 223 Wylde chamber, a 6mm WOA, and a 204 Ruger, that are used almost exclusively for P-dog shooting. There I can keep an eye on cartridges, and bucket anything that gets set back.
My accuracy tests of crimped versus not crimped shows no measurable difference. Well actually in the tests groups, for my LR308, the crimped rounds shot measurably tighter groups. That rifle has always been a bit different.
Squeeze
Squeese how do you keep an eye out for bullet set back with the
Ar loads that you don't crimp?
Do you drop the mag each time and look at the next round, or open
the bolt and look at the round that just chambered to see if the
feed ramp pushed the bullet back?
The AR cycles so fast it would be hard to check any other way, wouldn't it?