This may or maynot help...I just came in from the range, working up a load for my 308, its a model 7 with a 2x7 leopold. I was shooting 165 nosler ballistic tips, and decided to try 150's with the same powder load to make a milder, midrange load. I also just got a new BLR in 308 so i figured i could also site it in at the same trip. Bottom line, The model 7 shot a .80 group of 6 rounds..3 of each load ... no change in point of impact at all and a nice group for different bullet weights and a "thrown" charge (not weighed individually). The blr on the other hand would not group worth a damn with the 165 gr rounds and shot a nice 1 inch group with the 150's and with iron sights no less!! so maybe try a different bullet weight for your rifle, some times it makes all the differnce in the world.