I never got a chance to try the 270s, I sold the .444 to a fellow who was extremely interested in it, and I kinda regret it, now.
If I keep missing it enough, it will be replaced, and I will keep that bullet in mind. I know the 265 was/is a damn good bullet for the .444, so for the 270 Speer to exceed it, well, it only works out better for the shooter.
The Unicor is a bullet I have experience with in the .45-70, and it has served well in that cartridge. The same bullet design/weight would offer better SD in the .444.
I am well aware of the velocity/twist thing, and as long as you like higher velocity, then a slightly slow twist won't be an issue. And, I also like to use powders that exploit the space of a case without undue pressure.
It sounds like you have been around loading for big bores at least a day or two....(grin)
