I’ve reloaded for probably 10 - 6.5 prc factory rifles, Bergara and Christenson Arms. I’ve had the best luck with RL26. I’ve tried H1000, Retumbo and RL26. Bullets were mainly 140 vld’s and one with 135 a-tips. I have found the 140’s vld’s shoot best at a COL of 2.975” at 0.025-.030” off lands with powder charges at 56.0-56.5. I’ve been able to shoot 0.5 moa or better with factory rifles. Chronographed speeds ranging from 2940-3050 FPS, depending on the rifle. I saw pressure signs early on with H 1000. Retumbo didn’t seem to group as well. Information I received from Berger technical support after calling them with load data questions and pressure issues was that some of the factory rifles, especially CA, were chambered to tight causing pressure issues even at the lowest charge. I’ve even noticed chambering an empty brand new ADG brass casing, which is the only brass I’ve reloaded, to be very stiff. According to Berger this is some of the problems with pressure signs.