Even though my name was not mentioned in the subject line, I'm still going to chime in! [img]/ubbthreads/images/graemlins/wink.gif[/img]
Kirby built me a XP-100 chambered in 7mm/270WSM. It has a 17" Lilja barrel with a Defensive Edge Brake. I had it built for "knocking deer stiff" at ranges to 600yds. Puff is a super set up but the dies and brass for that baby are expensive. The Norma .270WSM brass for my build is easy to find and Kirby will shorten the 7mm WSM
sizing die as needed.
Anyhooo...I'm getting 2825fps from a 162gr A-Max and have taken three deer at very near 400yds (in MD actually!!) and they simply slump into a pile. I have 100% confidence that this rig will pile drive a deer at 600yds (and possibly more) but I limit my shooting to 500yds until I really get to shoot at ranges over 600+ to polish my skills.