I am not sure the only distance that I have shot the 77 grainers at was 100 yards. It is too far of a drive to get to the ranges that have longer distances. At 100 yards the 77 grain bullets gave accuracy of .3 MOA with a bipod, and sand bag under the rear. The only long range shooting I have done has been on coyotes out to 450 yads using 55 grain VMax. All fell dead from a single shot each. There were 5 of them preying on goats. By the time the 5th one knew what was going on he was hit.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.