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    Gunsmithing 5.10 Whisper /12.7X48 build

    I'm looking for advice on building a .510 cal suppressed rifle. my criteria are that it will be able to stabilize up to 950 grain cast bullets (thus I've read that an 8 to 1 twist will not be adequate). What are my barrel options? would I be better off forgetting about the 950gr. rounds...