I don't use a group size requirement but rather a distance limitation. That distance is the longest range I can count on getting a 1st round hit on on my 8" steel plates. My current rig will routinely put 5 shots in .3 to .5" at 100. I have put 3 shots in 2" at 500 yards several times with the same rig. But for whatever reason, getting that 1st round on an 8" plate past 600 is really hard. Once I get on that plate, I can stay on it, but I'm not a fan of spotting shots on any animal I have any respect for. Coyotes and pigs always have a round launched at them no matter what the odds of a clean kill shot are.

John

If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then I will hear from heaven, and I will forgive their sin and will heal their land. 2 Chronicles 7:14