338-378 no freebore load

Discussion in 'Reloading' started by wheatmiester, Jan 30, 2013.

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  1. wheatmiester

    wheatmiester Member

    Jun 12, 2010
    I just got my latest project back from my smith! I used a mark v action and a bartlien 5R 1 in 9.3 barrel carbon wrapped by abs, it finished out at 27.5 inches and wears a painkiller style titanium brake. The reamer he used had no leade built in so he had to get a seperate throat reamer to finish the chamber. He called and we decided to throat it with no freebore. I can touch the lands with a 250 or 300 grain berger-or others i am sure- So my question is how much should I reduce my starting loads and what should I expect for top velocities? Will that extra 1.5 inch barrel make up in velocity what I lost in bullet jump?Also would it be safe to fire factory ammo in this rifle? Not that I ever plan on it just curious. Thanks for your help