Ran my SR25 today with some brand new (very recent manufacture) BH 175gr. .308 Win. MATCH. Checked out some ejected brass and saw some signs of high pressure - severely cratered primers and even some material being pushed into the ejector hole on the bolt face. Anybody else seeing this????
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Black Hills Ammo in a SR25
- Thread starter fiveoshooter
- Start date
Re: Black Hills Ammo in a SR25
I suspect the problem you experience is not with the ammo, but instead, with careless regard in firearm design; the firing pin hole in the bolt face is too large -- considering the powder burn rate in that ammo, and the primer cup hardness.
Measure the firing pin tip. If its Mil-spec, its likely .077". A size that works is .065". Due to either carelessness or ignorance, manufacturers aren't making a better firing pin of the smaller size that endures fatigue - I suspect - so they continue with the larger sloppy size because it resists breaking at the tip. And the tip needs to be profiled like the sharp end of the lead of a pencil, rather than shaped like a nipple. Are designers really that stupid? Evidently!
John Paul, and JP Enterprises, and I talked about this last week. His company will reduce the hole of his Enhance Bolt with an accompanying pin. I hope he also makes an accompanying barrel extension and firing pin of the same Rockwell hardness as the bolt, and polishes the extractor and bolt face.
That would a truly, "enhance" bolt done right.
Remember: I'm not saying I'm right - just suspicious.
I suspect the problem you experience is not with the ammo, but instead, with careless regard in firearm design; the firing pin hole in the bolt face is too large -- considering the powder burn rate in that ammo, and the primer cup hardness.
Measure the firing pin tip. If its Mil-spec, its likely .077". A size that works is .065". Due to either carelessness or ignorance, manufacturers aren't making a better firing pin of the smaller size that endures fatigue - I suspect - so they continue with the larger sloppy size because it resists breaking at the tip. And the tip needs to be profiled like the sharp end of the lead of a pencil, rather than shaped like a nipple. Are designers really that stupid? Evidently!
John Paul, and JP Enterprises, and I talked about this last week. His company will reduce the hole of his Enhance Bolt with an accompanying pin. I hope he also makes an accompanying barrel extension and firing pin of the same Rockwell hardness as the bolt, and polishes the extractor and bolt face.
That would a truly, "enhance" bolt done right.
Remember: I'm not saying I'm right - just suspicious.
Re: Black Hills Ammo in a SR25
Got the ammo directly from Black Hills. Thanks for the input guys, I'll follow up with this soon.........
Got the ammo directly from Black Hills. Thanks for the input guys, I'll follow up with this soon.........
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