My shooting partner assembled identical loadings using WLR ( Winchester )primers and CCI-#34 primers.

The loads were mild to moderate with no perceived flattening of either primer ( close to zero back out). They were fired in the same rifle. The WLR primers had large frieing pin craters and the CCI-# 34 had craters almost 1/2 the size of the Winchesters. Which somewhat confirms that either the metal in the CCIs is harder or thicker or both. It is further evidence that weaker striking fireing pins may not be adequate to ignite the CCL # 34 primers all the time.

Although the sample size is small we ran into misfires only in two rifles so far and they were both Ruger varminters, one in .257 Roberts circa 1972 and one 22-250 bought in 2006. I will be loading some of these CCI- # 34 primers for use in my Ruger Varminter in .243 and should have some results in 2 weeks. roger

Roger, so far as the visual comparison of the cup's flattening or cratering, it would be more valid to compare them with CCI 250s.

quote:

Originally posted by Ricochet:
Roger, so far as the visual comparison of the cup's flattening or cratering, it would be more valid to compare them with CCI 250s.

No doubt you are right, John. This was a more of a passing observation and not one for which we planned to design a meaningful test. It just so happens that we use many more of the WLRs and WLRMs than anything elseroger