I just finished a 358 Ultra (UMT) build and the 416 Ultra will be the next one. I'm a sucker for big bore recoil. So far my Norma brass is on my 3rd loading and is going strong. Using 225gr TSX with 98gr of 7828, I'm right in the 3100 fps range.
It's a simple task taking the 300 RUM brass...
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