Don't waste your money and time on a 1-7 twist barrel.

I have gone down this road twice with Sierra and their new and greatest inventions with the 6mm 110gr low drag bullet with no success and now this new 150gr pig. Sierra recommends 7.5 twist or faster now they are saying 1-7 and they really want a 5r barrel and they don't wont the bullet pushed above 2900 fps or it will come apart in a conventional 4 land barrel well so much for that

The barrel will shoot 142 gr bullets pretty well not match grade great and it looks like the Hornady 147gr will also shoot although they maybe on the ragged edge at 3,000 fps it totally defeats the purpose of making these high BC bullets if you can't push them fast enough to get that advantage. And any bullet imperfections will should up much quicker in a fast twist barrel.