I did everything you could in an attempt to get my Pre 64 model 70 to quit two-grouping. It was bedded 3x, full length, floated, etc. Re tighten every screw, new scope mounts, relieve magazine box, relieve action screws, bolt lug engagement checked. New scope. Tried every load known to mankind. Consulted several of the Campfire Illuminati. Nothing worked. My rifle still shot two half inch groups an inch and a half apart. It was more than accurate for “normal” shots on deer, say, 300 yards and in, but it drove me mad.
Finally my rifle revealed to me that she just plain hated Nosler bullets....despised them. I never suspected that and failed to ever consider that little point. That was it. Sierra Gamechangers? Berger VLD’s? Quarter inch groups.
