I was out shooting my FAL today, seeing what it liked ammo wise as I haven't put much through it. Fortunately it seems to really like Monarch 147gr from the local sporting good stores, which is about $8 a box. It groups quite nicely, with only minor windage and elevation differences compared to other brands I had on hand at 100 yds. When I backed up to 200 yds, it still grouped great. However it had a MASSIVE (about 8"-12") windage shift to the right. It was kind of surreal actually. I even tried loading up multiple brands of rounds in a magazine, just in case it was me, nope, still the big shift. I'm just curious why there'd be a 4-6 MOA shift at only 200 yds, and only with this brand of ammo. Any thoughts?