We have a custom 30–338 Winchester Magnum it is a wild cat and there is not much information for it I know that the 308 Norma magnum is Very similar but it is a pretty picky gun when it comes to what it shoots the gun has the original military Barrel hi shot 64 grains of 4350 Nosler Accu bond 200 grain and it shot a decent group but it was Only at 35 yards and it shot a inch group It should shoot a quarter inch group at that yardage I don’t know if it’s the military barrel that is messing us up because originally it was chambered in a 30-06 but it may be the bullet and powder What is a good bullets and powder that you would recommend
