This is where I think you’re over thinking on this subject, when I first loaded copper many many many moons ago I never worried about rifle twist, I picked a grain bullet. I picked a powder and I shot it until it worked.
I’m now going into loading 150 grain barnes in my 7 x 57, do I have any inch of doubt that they will work?
No is a simple answer!
They will work sometimes they may take a little bit of figuring out ,but what you need to do is stop thinking about what the rulebook says, just get on with it don’t worry about it crack on!