Tula / Wolf primers

[hawghunter]

What is the difference between the .223 small rifle,small rifle primers and small rifle magnum i seen it posted some were but can't find it again. thanks Mark

 

[JohnnyJohnson]

The SRM have thicker cups. I've ran both across the chronograph and the difference in velocity was within Standard deviation.

 

[spclark]

Yeah, the numbers don't tell you much and the descriptions are confusing at best.

From what I've been told: for both brands, the KVB223 is their standard small rifle primer, the KVB223M is the same standard primer charge with a magnum-weight cup, the KVB556M is a magnum primer in all respects - stronger charge in the heavier cup.

I've been using original, Murom Plant "Russian" KVB223 primers for several years but they tend to crater in most applications. About six weeks ago I got the info above from a vendor, ordered a case of the 223M primers & have been very happy with the results. Cratering doesn't happen & I'm getting seriously better SD's & groups with them compared to more costly alternatives.

 

[hawghunter]

Thanks for the info. Mark