My t3x 300wsm 200gr is the limit it will stabilize the eldx200gr shoots great sub moa out to 200 and the Terminal Ascent 200gr is right around 1moa but longer distances I guess they could get wonkey but in Alabama I don't really have any shots longer than that unless it's on power lines but my fav bullet is the 185 berger hybrid it'll touch holes for 3 shots n does damage on white tailsThat might be the case. They updated the 300 win mag to the 10 twist and I assume the 300wsm is on the list to update too. Hopefully it's been done. The 300win I had from Tikka wouldn't even shoot 220 grain with the 11 twist.