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when we cryo treated my sons 270 he got 100 ft. persecond faster out of the barrel. the shorter the bullet the faster it will go and the more accurate it will be. commercial barrels never have the perfect twist for longer bullets as a custom barrel would. for my sons 270 i loaded 90 grain 270 bullets for 3100 ft per second and it was very very accurate. same with a neighbors 25/06. a 90 grain bullet. if you want a one hole gun get a custom barrel made for the bullet you want to shoot. cryo your barrel it will go faster for the slickness that comes from it.
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