CCI 400 vs CCI 450 in .223

[rcinit]

The #14 Speer manual list both CCI 400 & 450 on their .223 loads.

The Sierra 5th edition manul list Winchester small rifle primers .223 loads.

The Hornady Seventh edition listed Remington 7 1/2 primers for their .223.

My question is which primer would be best for my situation? Small rifle or Small rifle magnum? I'm curremtly using Varget powder which normally gives a pretty full case. I had been using CCI 400 with good results but thought I might try CCI 450's. Whats your thoughts on using Small rifle magnum vs small rifle primers?

[A_Gamehog]

Me personally I like the 450's with Varget. If you shoot for accuracy it does matter. Full case of varget+450"s is a good load to start with. The 450's have a thicker cup so if you fire an AR-15 it's even better. Less chance of a slam fire.

[kkeene]

I get better accuracy with the CCI 400 or CCI BR4 primer over the CCI 450 magnum.

[rcinit]

I'm shooting thru a mod 12 VLP DBM. Very accurate rifle. I'll just reduce my current load 2 grains and work my way up. I thought maybe their was a reason to use a Magnum primer in a .223 case.

[scope eye]

I'm shooting thru a mod 12 VLP DBM. Very accurate rifle. I'll just reduce my current load 2 grains and work my way up. I thought maybe their was a reason to use a Magnum primer in a .223 case.

Hi yes there is a reason for magnum primers, the reason they were developed was for sub zero temp military use.

[CJ in WY]

I use a 450 primer for AA2200( I concider it a must for this powder) and some BLC-2 loads but otherwise 400s or 7.5s get the nod depending on application.

[1Shot]

..All I use in the 223's is 400's..I save the 450's for my 6br...

[Blue Avenger]

I have most in stock and try them all, but end up with BRs most of the time.