This was also the first time I experienced heavy mirage. It was so thick at times the whole target moved. (the grass on the range and berms had just been cut this morning after a week of rain). In the second detail I just wound the Nightforce BR scope down to minimum magnification. I also tried my 'anal' loads in Winchester and Lapua - they performed equally though the Lapua seemed to hit 1/2 MOA higher on the target.
So the rifle was bedded around the 2 front action screws and the muzzle crown recut to remove the nick. I am a happy camper once more

Cheers
David