I have a ton of 286 Partitions so I haven't been in a rush to find out.
+1
Much prefer 286gr. NP in my 9.3x62
Yeah, if I wanted to shoot 250's I'd use a Whelen!
I've had such good luck with both the the Prvi 285 and NP 286 that I just never saw the need to try anything else. I've built several 9,3x62's for customers that love the 250 AB or the old BT though.