Primer Question

[firemanjoe]

I normally use CC450 primers for my .223 loads for my AR, but everywhere i have looked is out of stock. I am considering trying Remington primers. Would you recommend 6 1/2 or 7 1/2 as a substitute?

[Spanky8601]

The 6 1/2 would be best for a AR used for plinking and such. If you are into precision then the 7 1/2 are Bench Rest rated. I think that means the 7 1/2 are a little softer cup.

[firemanjoe]

Thanks, im looking for a slightly harder cup, something that would compare to the CCI450

[bryant]

here more substitute for ar cc1#400 br4 remington 7 1/2 and winchester srm never try wolf yet. currently using winchester srm on my ar. remington 6 1/2 is not re-comment on 223 remington

[RoundEye]

I hand load for High Power matches and use CCI 400s without issue. I've also used Winchester primers in the past. I don't really think it makes that much of a difference, but then again I may just not be good enough where it makes a difference.

[Southpaw45]

6 1/2 Remington primers "ARE NOT" recommended for use with .223 ammo. It even says so right on the box of primers. The 7 1/2 primers "ARE" safe to use with .223 loads.

[Southpaw45]

The 6 1/2 would be best for a AR used for plinking and such. If you are into precision then the 7 1/2 are Bench Rest rated. I think that means the 7 1/2 are a little softer cup.

Just the opposite. The 6 1/2 primer cup thickness is .020 and the 7 1/2 primer is .025.

[rudynix]

The 6 1/2 would be best for a AR used for plinking and such. If you are into precision then the 7 1/2 are Bench Rest rated. I think that means the 7 1/2 are a little softer cup.

I believe you have this reversed, the Remington 7 1/2 have a thicker cup and are more compatible to the CCI450...

http://www.jamescalhoon.com/primers_and_pressure.php

[ar15robert]

I use the 7.5s for my .223 loads for the good stuff.Win SR for my plinker stuff.