I have a 6mmPPC that was built for me by RW Hart. I do not bench rest shoot competitively, just for fun. With Norma cases, Berger 68gr bullets, BL-C(2) powder and CCI 400 primers I got a 4-shot, 100-yard group of .257". I've used H322 and Varget and no group with Bergers, Hornady VMax or Sierra...