Anyone do this? I read something about slight differences at the base? I ran a 7MM Rem Mag Case through my .257 Weatherby die just to see, worked flawlessly. I wish now that i had measured and noted the differences, i dont own either rifle anymore, but stil curios about this.
While I haven't done that particular conversion, I see no reason it won't work since both cartridges were based on the .300 H&H originally. The Weatherby case may be specced a few thousandths longer.
Robert
I've done it. They work.
Only two "issues"
1. Formed cases have a slightly shorter neck. Not a significant issue.
2. Case capacity internally is lower than the Norma/Weatherby brass. Start 15% below recommend charges. Most loads will be 3-5gr below regular charges.
Not a bad idea to anneal the necks before reforming. I didn't but did collapse a couple.
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