Is there trick to loading 257 WM

[Canhunter35]

We shot it today with 70gn H-1000 and think I have a distance from the lands to work with. 2 3shot groups came in @ 1.3 and .9. I don't think that's a bad start. The other 4 groups didn't come close. I don't suppose Berger 115 would stabilize in a 1:10 ?

Mine shot them great with a 1:10 twist. I don't remember my coal but I used 67gr of 7828. Try a few different seating depths in .02" intervals, you will find a sweet spot the vlds like. I also recommend annealling that 257 brass, it doesn't take many reloads and the necks split