I am really struggling with my long range hunting/target gun and I would love some help. I am shooting a Rem 700 (Long Range Model) chambered in 7mm rem mag. My hand loads are 77.2 g of RL33, once fired and not resized Nosler brass, Winchester Large Rifle magnum primers, pushing a 180 grain Berger Hunting VLD. I have weighed and measured size and volume of every piece of brass. H20 weight 88.1g with a .5g ES, LTS of 2.141" with a .005" ES, OAL if 2.515" with .001" ES, and almost no differences in diameter at neck, shoulder and just above the belt. During load development I landed on 77.2 g with an average MV of 2975 at 75 degree air temp with groups about .5 to .75 MOA. All the brass, primers, powder and bullets are from the same lot. I use a RCBS digital scale, that I warm up for about a half hour before use, and Redding Competition Neck and Seating Dies. I have uniformed all the primer pockets with a K&M Pocket Correction Tool and seat the primers with the RCBS Universal Hand Priming Tool. My length to ogive is 2.804" which is .003" off the lands. I use a Magneto Sporter to measure MV. The stock barrel has 803 rounds through it, and 607 rounds since I last removed any copper. With all the care and detail I have put into these hand loads, I am still getting a pretty high extreme spread in MV of 46 FPS. I have also started to get lover and lower average MV. Last time out the average MV was 2937 at 91 degree air temperature, 14 degrees hotter than my testing at 75 degrees. So I have two questions: 1. what could be causing the lower MV and 2. What can I do to reduce my ES? Cheers!