.338Fed subsonic -help?

[Ranger01]

I recently imported a supressed Tikka T3 .338 Federal 1:8 twist and 16 "barrel length. I have been trying to research load data to get this gun shooting accurately I am currently experimenting with 250grn round nose bullets with 14gms trailboss powder and just cant get any consistent accuracy- any advise would be greatly appreciated?

[Alleycat]

Are you using magnum primers?

[HUNTER2]

375-06 imp. - started using magnum primers, crimping, even made the flash hole slightly larger. Also have been using 12 gr. of unique. Of course you would have to decrease. good luck...