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Re: A few comments on primers for BPC rifles

Posted by George Schmitz on Wednesday, 20 May 2009, at 9:35 p.m., in response to Re: A few comments on primers for BPC rifles, posted by Wayne McLerran on Tuesday, 19 May 2009, at 1:28 p.m.

Maybe a better way to use large pistol primers in cartridges for the 45-70 is to use the under the primer method. I made a paper punch that cuts wads to .214" diameter. These go in the primer pocket before the primer is seated. Since large pistol primers are about 5-6 thousands inch shorter than std large rifle primers the problem of "peening the breech block" is negated as the primer is now seated flush to the end of the case. My best results is using construction type paper that is 6-7 thousands thick. Others seem to do OK using strips of paper along with a hand priming tool that cuts the paper and seats the primer in one stroke.

The method of using paper over the flash hole, inside the case, works also but you can experience loading problems as those wad are NOT consumed during firing. I have had them stick in the chamber and prevent loading the next round.

Which ever method you choose to lower primer brusiance will certainly help to lower the amount of verticle stringing our beloved trapdoors are known to exhibit.


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