I sold my Swift as I couldn't find a decent big game bullet than would stabilize in my 14 (or worse) twist and it was too heavy to use for calling coyotes. I have a couple of 22-250s with 14 twist and I have settled on 50 Blitzkings myself. I also use this bullet in my 222 (probably a 14 twist) for calling coyotes.
I agree that 4064 is probably the worst of the rat turd powders for metering through a powder measure. I would sure try some new ball powders first if I went back to it.
For whatever reason, the best powders in the 22-250 were not the best powders in the Swift, even with the same bullets. I mostly use TAC in my 22-250 with the 50s. I liked H380 when I shot 55s.
