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To Denster,
In pressure terms, a force pushing on a 12-28 nipple upon powder ignition, has an area related to 0.38622 sq in. In a 5/16-24 nipple, that area is increased to 0.49063 sq in. which, just guessing without doing the math, is about a 20%+ increase of force on the nipple area and related threading in a standard 50 grain charge. If this rifle was an Enfield or Springfield rifle at .58 cal. plus, I would'nt be worried, but the smaller caliber of this rifle, pressure spikes are more dynamic. That was my worry. I was just wondering if anyone had done this before and had not shot the nipple through the bill of their hat or worse yet.
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