Veral,
I am getting double groups with my 458-400-M. Before I go changing or tweaking my load I figured I'd get your opinion. What I'm getting at 100 yards is two very tight groups about 2.5" apart from each other. Today I put my first shot low, my next three into an outside to outside group not over .5"!!!!. Then the next shot went beside the low one. I didn't clean the gun so I could see if what was happening last week was still happening. I don't think it's my bench technique...I'm fairly experienced at this and the scope is fine, I checked it with some other loads and they do as they always did. These bullets are air cooled straight WW metal. I'm willing to try the water quenching if that may be part of the problem. I'm getting no leading at all, I'm using 50/50 Beeswax/Staylube Moly-Graph grease which has always worked well. I did bump my load up 1 grain of RL-7 from 45 to 46 since your bullet doesn't seat as deep in the case. I'm tempted to go more but I want your opinion first. Thanks,
rob