Hypnogator
Member
Last night I reloaded some twice-fired LC-13 cases with CCI-41 and CCI-400 primers to test different loads. I found, to my surprise, that the CCI-41s slipped easily into the primer pocket, with almost no resistance. Now, an enlarged primer pocket is usually a sign of very high pressure, but all of this brass had been loaded with fairly mild loads. Some of the cases were so loose that I was able to deprime them by hand!
I finally found 25 cases that retained the primers adequately, then, just for gits and shiggles, I tried priming the "too loose" cases with CCI-400 primers, and they all primed with what I consider "normal" resistance. So I miked the primers, and found that the CCI-400s uniformly measured 0.175" in diameter, while the CCI-41s uniformly measured 0.174".
I don't know whether the batch of 41s that I bought are slightly out-of-spec, or whether they are manufactured smaller, perhaps to facilitate crimping.
Just wondering if anyone else has experienced this phenomenon?
I finally found 25 cases that retained the primers adequately, then, just for gits and shiggles, I tried priming the "too loose" cases with CCI-400 primers, and they all primed with what I consider "normal" resistance. So I miked the primers, and found that the CCI-400s uniformly measured 0.175" in diameter, while the CCI-41s uniformly measured 0.174".
I don't know whether the batch of 41s that I bought are slightly out-of-spec, or whether they are manufactured smaller, perhaps to facilitate crimping.
Just wondering if anyone else has experienced this phenomenon?