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Old February 1, 2022, 07:06 PM   #8
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Join Date: January 24, 2011
Posts: 1,427
scorch wrote Back a couple of decades, Barnes X-Bullets were famous for extremely heavy copper fouling. I thought they had gotten it a little better, maybe I was wrong.
No you didn't get it wrong, that's why the X-Bullet became the TSX. The three relief grooves helped ameliorate those rifle bullets tendancies to over foul.

Too many people forget or don't know that pureish copper has a much higher coefficient of friction with steel than gilding metal (aka brass alloy). There is a reason that ~95-5 to 90-10 has been used since circa 1895.

There is a way to lessen the issue with or without lapping the barrel using Moly but it is done in a way that most do not use Moly. Moly being MoS2
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