Any advice on a long range pistol scope? To give you idea of what I am looking for. On my Tompson Contender chambered in 300 blackout today I was shooting at 2080 yards. I currently have a 2x7 BSA on it. At this distance I am finding as I get setup with the proper eye relief as I move my eye around the cross hairs move a couple MOA on the target. I have seen this once before on a rifle scope to say the least that scope is long gone. Louplod has a 2.5x8 I am leaning in that direction. Any advice?