I have 4895, Varget, H-414, CCI, Win large rifles and Rem large magnums, and a decent count of both 50 and 60 VMaxes. Have some 50 TNTs, some 52s, I think even some 55 VMs. Have some TAC, too.
So, can any of you suggest a Swift load out of my stuff that worked for you?
I would not bother with the 60 grain VMAX. That needs a 1-12" twist, never seen a 1-14" (which is what the Swift has) that would stabilize them.
For powder I'd start with Varget since it is pretty temperature stable. I've had really good luck with it with middle weight bullets in the .22-250. Try it with the 50 TNT first, then the 50 VMAX.