I'm building a 260 AI for 500-1000 yard varmint but ricochets might be an issue. As a sidenote look at the 22-53gr VMAX in 5.56 AR15. My HBAR gets 3200 fps. Run that in JBM and it should expand out to 575 yards in Montana's elevation. I'm going to look into another 22-250 with a 1-9 twist. I'll be concentrating on 53gr VMAX to 75gr ELDM.