I know this thread hasn't been active for a few months but I just found it and wanted to weigh in. I've got a GAP built 308 and a StraightShot 300wsm build and had the exact same experience with both rifles. Best I could do with either rig and the HSM loaded 168 and 185 Bergers was 1.5 inches at 100. But I knew it wasn't the rifles cause I've done a lot better with the Sierra MKs. I switched to Nosler Custom Factory Ammo in 165 and 180 AB the same day and averaged 1/2 inch at 100 with both rifles. One group was .27 inches and several in the .35 to .5 inches. Massive difference! I think it's all in the seating depth on those Bergers. I haven't given up on them but I'm not going to shoot the HSM Berger factory stuff any more. I've had great success with the HSM MatchKing and AMax but not the Bergers. So, I bought a reloading kit and I'm about to load up some Bergers that are tweaked to my rifles. IMO it's a good excuse to start reloading