A mate had one for a while, before he got an offer on it too good to refuse!
It was handloaded with 600gn Woodleighs that came with the rifle, we didn't get to chronograph the loads, but they would drill clean thru 18" gum trees (hard wood) & keep going!
It shot exactly to point of aim 40-50 yards & was very accurate off hand.
Those loads certainly had a lot more zing than my 500NE 3" which clocks 570gn just over 2150fps, it had a good stock & was weighted well; recoil was controllable & manageable - still wouldn't like to have a big session at the range with one of these though, give you a recoil headache!