AR primers.

[Erni]

Have CCI400 primers. Most web searches indicate to use the 450 magnum or 41 hard cup primers for an AR. Anybody run 400s, and did you have issues?

[cstone]

I load CCI 400 in my .223 reloads and run them through my ARs. Haven't had a problem. I also use Tula small rifle primers, KVB223. They have always gone bang and I've not had a slam fire with either.

[Great-Kazoo]

Have CCI400 primers. Most web searches indicate to use the 450 magnum or 41 hard cup primers for an AR. Anybody run 400s, and did you have issues?

Other than seating issues, no. The ones i've loaded (4K) went bang, with same POI results.

[Blowby]

I run them with no problems.

[Slapps74]

I run them as well no issues.

[Erni]

Thsnk you folks.

[SideShow Bob]

Just keep a sharp eye out for protruding primers.... Even marginally high ones. Or you may experience a slam fire........

[Zombie Steve]

Thousands and thousands and thousands without incident. 450 is the same cup, just a hotter / magnum primer. 41's are a harder cup, magnum primer (I'm starting to really like these with CFE-223).

You should always pay attention to seating depth.