375 HH Mag Conversion

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I have a hand-me-down Remington 700 chambered in 375 HH Magnum that I'm looking to convert to a 7 mm PRC as a dedicated elk and long range plinking gun. I've heard/read there may be issues with feeding from magazines but wanted to confirm here. The plan is to use a chassis system, probably the KRG Bravo and Preferred Barrel Remage barrel system. Any advice would be appreciated.