Hey guys I am in the final stages of my load development for my 7mm Remington mag custom rifle
. My rifle is built on a Remington 700 action that has been rebarreled with a Broughton 5.5 5C 1 in 9" twist 26" barrel. My goal was to push a Berger 180gr VLD at 3000fps. I reached that goal today with my final load. The load consisted of a 180gr Berger VLD, 72gr of H1000 and a CCI 250 primer loaded at a COAL of 3.540" .o15" off the lands. My average velocity for a 5 shot string was 3008fps with an extreme spread of 29.8fps the group measured less than .75" center to center. I would like to get the extreme spread down a little more so my question is If I were to go to a CCI 200 or Fed 210 primer and keep my load at 72gr of H1000 do you think my pressure would increase, decrease, or stay the same. I was hoping not to reduce my load and have to work up again but if you guys have experienced pressure problems by going to a cooler primer then I guess I will have to start over.