Does it happen only with the first group? How many shots are you firing into the group? It may be you getting settled in behind the rifle. I know nobody wants to consider that possibility but I went through the same thing only to find out it was a shooter problem.
No matter how my ammo is loaded into the chamber, the COAL does not change. I have to chamber the same round 3-5 times from a magazine to get the bullet to budge and it actually moves forward just a few thousandths. Measure your neck tension to be sure but as long as you are getting .002"-.003" you should be fine without a crimp.
Last edited by wareagle700; 08/05/15.
