I have a 6mm ackley with a 22.5" barrel and am having pressure problems when reaching the max loads listed for a standard 6mm. I am shooting 95 Berger VLD's and have them .003 off the lands. I was wondering if anyone has any ideas why I am having this problem. I have the just enough headspace so the bolt closes with the slightest resistance. I am having primers flatten and slightly crater. I am using IMR 4831 and H 414. With the 414 I have only gone to 45 grains and have pressure problems. Anyone have any suggestions???