Re: Help 1/2 groups at 100 and 5'' at 200
Uh, you might try moving another hundred yards away from the black hole...event horizon and all, you know.
Seriously, some more specifics might help with the diagnosis (type of ammo, does this happen with more than one ammo, MV of ammo, wind conditions, etc.). That amount of change in shot dispersion between 100 and 200 yd is enormous, but assuming you're not <span style="font-style: italic">really</span> right at the edge of a black hole, there must be a reason. The key is to identify as many variables as possible to try and get a handle on what it could be. More often than not, it comes down to 1) shooter (no offense intended), 2) ammo, 3) scope, 4) conditions... and so forth. Having someone else try it can possibly answer #1. The others you can check yourself by making sure scope mounting is solid, trying other ammo, shooting at variuos ranges in between 100 and 200 yd.