At 50 yards for a plinking load, 6gns of Red Dot with a 150gn loverin type cast bullet.......half inch groups. Any fast pistol powder will do, Green Dot, Bullseye..6-7 gns... For 100 yards, 150-190 gn cast bullet, 14 gns of 4198, any other fast rifle powder. For Bisley, 200 yards and FMJ I usually use 3031, 32 gns...a very mild, accurate load. Re 7 also good.... N140 has a very good reputation and Vit reloading data is online.

Dodgy Rog has the 190gn NOE k31 cast bullet mould, made especially to fit the k31 bore. Hard cast and GC, Rog shoots them at 600 yards, I understand.

My home range does not allow FMJ so I have experimented with a number of cast bullet types...problem is getting them to chamber in the very tight bore with practically no lead in to the rifling.
You will have no problems with the PPU FMJ bullets.

Mike95