I have a 7mm 08 sako 75....in the past i have found that the nosler 140 spitzer with 46.0 grains of IMR 4350 to be the most accurate load...i loaded up some 139 SST with 43.5 grains of varget and it was all over the place and i went back to the 140SP. and the IMR and its shooting two touching and the third is 2 inches high....is my barrel getting over heated? for the third shot in the group? im thinking that its a bedding problem. any suggestions?