Looking for info on 30-378 WBY Imp 50 degree shoulder.

Discussion in 'Long Range Hunting & Shooting' started by osok666, Jan 25, 2011.

  1. osok666

    osok666 Member

    Dec 6, 2009
    Does anyone here fire this round ? I'm considering rebarreling my Accumark. Any info would be helpfull. Forming the case, velocities, is it worth it over the factory round. Help me decide. lightbulb
    Last edited: Jan 25, 2011
  2. budlight

    budlight Well-Known Member

    Sep 30, 2004
    I went through two barrels on my 30-378 and it was ready for a third when i sold it. But anyway I ask this question today to older long time gunsmith and wildcat shooter. He said just what I said: "WHY?" The venturie shoulder might cause more brass flow in the neck and shoulder. I don't think I ever had to trim the case, they had other problems and I just threw them away.

    I only really shot 210 SPBT 220 spbt and 240 match king.

    As for velocity. to begin with you only have a 400 shot barrel at best. I only did enough chrono time to get scope doping and ballistic tables figured out with relatively case friendly near max loads.

    I had a 28 inch barrel + two inch brake. If you wanted more speed try a longer barrel.

    I really considered changing it to a 338-378 optimized for 275 - 300 grain pills and then you would really have a weapon.
    Last edited: Jan 28, 2011
  3. Rosco1

    Rosco1 Active Member

    Feb 14, 2010
    400 shots on your 30-378?

    My accumark was nearing 1000 shots when I worked up this load


    That said, its getting a 33 barrel soon.