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Posted: 9/22/2008 2:58:54 PM EDT
[#1]
Well you could try the CCI 41s, which are CCI magnum primers with slightly thicker cup, and the anvil is further from the primer. Note, they are magnum primers, adjust accordingly!!! But, before you do that, find an AR-15/M16 firing pin protrusion gauge. That'll tell you if your firing pin is coming out too far. If it is, you might be in for a whole new BCG.
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Posted: 9/22/2008 9:10:59 PM EDT
[#2]
where do you get that tool?
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Posted: 9/22/2008 10:14:01 PM EDT
[#3]
pgiinc.com/mitutoyodiagram.html
#4, Hence using the back end, check the depth of the lug to bolt face, Now insert the FP and bottom it out against the back end and take another reading. The difference will be the protrusion of the FP when it fully seated. In 223/556, you want between .032 to .037. In 7.62 X 39, you want between .037 to .039 Also take a look at the face of the FP. if needed just dress the end when you are bring the length back to spec. Simply, as long as the front/tip of the FP is still in good working condition, it's adjustable, either by shorting the tip, or if length is needed, then setting back the seat bearing edge. Note: it ain't fancy, but just chucking the back end of the FP in a drill will allow you to spin file to make the needed adjustments on it. |
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Posted: 10/9/2008 11:19:01 AM EDT
[#4]
had my gun smith check the and it was .032
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Posted: 10/9/2008 1:55:11 PM EDT
[#5]
Is the hammer spring stock? Weak springs and light hammers can cause this as the residual force helps hold the firing pin against the primer, reinforcing the primer.
Also, check the bore,especially the throat. Worn or excessively dirty throats can raise pressure. Run a new bore brush through the bore from the chamber, if it gets easier as you get down the bore, you need to clean the throat. |
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Posted: 10/17/2008 8:55:35 PM EDT
[#6]
I ll try it but I have a feeling it was the primers, I fired M855 and did not have any problems,
I am making another load using Military primers and another bolt. |
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