6mm Super LR it's a basically a 6mm straight walled with a 30° shoulder it has a bit of a short neck for the heavies. It really shines with the 90 grain range of bullets which your twist should stabilize.
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243 take off Barrel. Rechamber to?????
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Only cost I will have is the reamer rental. My buddy will do the work. He just turned his 223 into a 22-250 AI. Just trying to put two barrels to use rather than gather dust. I already have a 243 built for the heavies and a standard twist 243 just looking for a project. Guess I am just bored. If I like the cartridge I will build what I really want for it.
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