I have a 24.5" Tikka T3x Tac A1. Shoots factory Prime into 0.55-0.6 groups, and Hornady 140 ELD-M a little wider. Have to test more loads. I also have a custom 6.5 Creedmoor on a Tikka action, and it shoots better, but not by much - factory Prime is usually around 0.5 for e.g. Velocity out of...