I shot a benchrest one. Had 30" barrel 1" OD barrel Shilen, with 700 action. Not much to say, made one hole at 200 yards. Whats expected out of a benchrest gun.

Seems to be the hot cartridge in 1000 yard shooting. I was going to have one built myself. But kept hanging around the 1000yardshoots and saw that it would take much more time and stuff than I was wanting to invest.