Chasing tight groups has cost me a lot in ammo. At the end of the day, I've come to the conclusion that any deviation from a good group is largely down to "variable factors", by which I mean my ability (or lack of it) to shoot straight. It's the first shot from a cold barrel that does the business, so provided that is somewhere near the mark then I'm happy. Never yet had a deer walk out in front of me when I'm about to take my 10th shot off a bench and beanbag.