Thread: Grouping problem 338LM

Just saw the groups , vertical can be caused by the butt slipping against your shoulder , you could try some one else shoot your rifle to see IF you or the rifle has the issue .

Are you using Moly coated bullets ? , as they show a split group like that until fouled , they also require different technique in sizing after shooting.

You are no doubt aware that in the 338LM calibre , brass is critical , as the pressures are very high , most shooters get 8-10 reloads out of Lapua made brass in this cal , BUT only 1-2 reloads out of Norma made brass , as such that would suggest to me that the norma brass is not as tough , ie cannot handle the pressure as well , this may show up as losse primer pockets & inconsistant neck tension ?

Later Chris