I use my 284 for stalking/hunting and I use it for 1000yds snapshooting.i used it once for f class when my f open rifle was away with Neil Mckillop getting another barrel fitted.. it was 300 and 600yds.. it shot very well..
I used the 1000yds snapshooing load that I use with a muzzle brake but I put my mod on as its quite kicky with a naked barrel..
The 26 inch barrel wouldn't be competitive at 1000yds against race guns.. ok for 600yds it seems.