Both NULA rifles that I own shoot 1/2" 5 shot groups at 100yds with ease. The 257wby has a #2 contour and the 270wby has a #3 contour. I will tell you that the 270wby is likely the most accurate hunting rifle I will ever own, having built over 20 custom hunting rifles this is saying something. Buy a NULA, sell the rest!
