Decided to try some extended round groups at 100 yards just to see what effect heat buildup would have on my rifle. Shot a 10 round group with around 20-30 seconds between shots that measured .947" and the following day shot a 20 round string the same way that came out to be 1.4 inches. I noticed after about 15 rounds the shots started to walk down and to the right. Anyone ever shot these kind of strings before and noticed similar results? Just trying to get something to compare to...My shot accuracy remained consistent but at the end the POI had moved about 3/4 MOA low right.