I haven't yet. The furthest I've shot is 500 with my 700 in .06. I can keep sub MOA but the recipe I thought I would never forget seems to have slipped my mind. I haven't been at the bench for a few years until a few months ago. I should have written it down.
I've since picked up a couple .308s, an M1A and PA10, and am working up a load. I've got a membership over at Elbert County Gun Club in Elberton GA that goes out to 400, but they hold monthly members-only 600 & 1,000 matches off site. I've got sets of several seating depths loaded and ready to go. Once I see which is best and figure the dope, I'll be hitting those matches for certain.
What about yourself? Where do you stretch the legs of your rifles?