I am messing with a new cooper 92 in a 6.5-284. Two different loads. 143 eldx with 57.5gr retumbo and benchrest primer with lapua brass. 2960 fps best group after ladder test was .740. Second load is berger hunting vld 140 same everything except 58gr retumbo 3030 fps. best group .639. 57 rounds down the tube and the groups are not even close to the test target that came with the rifle. Also Berger says coal of 3.228. I am jamming lands at 3.15 and cant physically chamber one at book length. Not sure what book coal is for the eldx Kinda mad right now as I could have done that with a 700 dollar remington or a 300 dollar salvage. scope is a nightforce shv 5-20-56 moar. Brass has only been fl sized Any ideas?