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Rifles, Reloading, Optics, Equipment
Reloading
CCI BR2 Primers
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<blockquote data-quote="308stillbrass" data-source="post: 1717297" data-attributes="member: 109919"><p>Keep in mind that primer cup hardness isn't the only possible problem. If there is too much slop around the firing pin in the bolt face you can very easily get primer cratering that is a false positive for pressure signs. When in essense all you have is an improperly supported primer with pressure against it on one side and no steel supporting it on the back side.</p><p>This could be because of a different issue also. Do you use a flashhole deburring tool and open up the flash hole too much allowing more pressure back into the primer cup area? Not a big difference but it does make a difference depending on the case and how big you make the flash hole.</p><p>Just some other things to consider rather than simply switching primers until the cratering goes away.</p><p></p><p>I have several bolt guns that I had a bushing installed into the bolt face to tighten up the slip fit of the firing pin and firing pin hole just for this very reason. It helps cut down on the chances of piercing a primer and getting blow back into your face and eyes.</p></blockquote><p></p>
[QUOTE="308stillbrass, post: 1717297, member: 109919"] Keep in mind that primer cup hardness isn't the only possible problem. If there is too much slop around the firing pin in the bolt face you can very easily get primer cratering that is a false positive for pressure signs. When in essense all you have is an improperly supported primer with pressure against it on one side and no steel supporting it on the back side. This could be because of a different issue also. Do you use a flashhole deburring tool and open up the flash hole too much allowing more pressure back into the primer cup area? Not a big difference but it does make a difference depending on the case and how big you make the flash hole. Just some other things to consider rather than simply switching primers until the cratering goes away. I have several bolt guns that I had a bushing installed into the bolt face to tighten up the slip fit of the firing pin and firing pin hole just for this very reason. It helps cut down on the chances of piercing a primer and getting blow back into your face and eyes. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
CCI BR2 Primers
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