08 October 2004, 11:05
<eldeguello>Re: .270 Gibbs-fireform and loads
The .270 Gibbs - Rocky Gibbs' favorite cartridge! With the 150 grain bullets and a 26" barrel, you should be able to reach velocities of 3,000 FPS or so with loads from 53 to 55 grains of IMR 4350, 58 to 60 grains of H4831, or 59 to 61 grains of IMR 7828. Naturally, starting loads should be 5% below the lowest charge in this range, and worked up to. Sounds like your fireforming load is already at the bottom of this range, if you used 150 grain bullets with that 59-grain charge of H4831. If it is not causing problems, then you already have a starting point!! Good luck! Let us know how it shoots!!
