I recently had a new Lilja barrel installed on a Winchester Model 70 action chambered for the 375 Ruger cartridge. The barrel is finished at 22". I started with the 260 grain AccuBond bullet because I was hoping to shoot somewhere around MOA out to 300 yards. I figured if any 375 bullet could do it it would be the AccuBond. Regardless of powder and charge used I haven't achieved a group under 3 inches at 200 yards from a bench, most powders shoot between 4 to 8 inch groups at 200 yards. Not impressive. The 3 inch group was achieved using a Winchester LRM primer, 79.0 grains of Win 760 powder, and a COAL of 3.325". Temperature was 70 degrees, give or take 3 degrees. Elevation was 4,950 ft. Is this to be expected with this cartridge All muzzle velocities average close to 2,750 fps. Any suggestions on improving groups, or is this what to expect with with cartridge?
The rifle is glass bedded in a Bell and Carlson stock with the Aluminum bedding block. The Timney trigger is set to 2.5 lbs.
The rifle is glass bedded in a Bell and Carlson stock with the Aluminum bedding block. The Timney trigger is set to 2.5 lbs.