i just had a 257 Roberts barrelled on a Remington 30 Express with a 7 1/2 twist Brux barrel this rifle shoots 115 Bergers,Nosler B.T. OR Partitions 1 /2 inch groups at 100 yards but my groups with the 131 gr. Black Jack bullets are not consistent at all. i have been shooting 1-10 twist 257 Weatherby mags for 15- 20 years now and my rifles are yes all customs they shoot great with 100 gr.Nosler partitions or Swift A-Frames and kill deer just fine and these 2 brand bullets don`t blow up at 3800 fps.
Last edited by pete53; 07/13/20.
