In a 10 MPH wind at 200yds that bullet gets about 1.4 MOA of wind drift, or 2.8”. Add that to a 1 MOA group, and that’s 4.8”. Look at his group, it’s about 5” wide, and 2” tall. His gun is continuing to shoot 1 MOA at 200yds, and he’s experiencing about 1.4 MOA of wind drift variation. He doesn’t need to practice at increased distances, he needs to pay attention to the wind.
I shot 190 VLD’s from a 12” twist from 300yds to 1000yds. There’s absolutely no reason that an 11” twist won’t shoot a decent bullet weighing 165grs. He should be able to run up 180grs using high BC polymer tipped designs and even to 200gr+ from non-tipped or lower BC bullets. There are likely a few extreme bullet designs out there that would be exceptions. Lead free bullets would be exceptions too due to their lower density. Published twist recommendations are based on shoot at sea level and 60* F. Most elk hunting is done at much higher elevations.
If it was “classic left/right movement” from poor technique, it would show up at 100yds as well, unless he’s completely changing his shooting technique between 100yds and 200yds.
Good point @ImBillT wind here in South Texas by the ocean is not forgiving at all. I'll definitely take that into consideration next time at the range, thanks!
