I have NO idea what the V powders look like, other than they are extruded. I suspect they won't flow much better than the 4350s.
Your expectations may be completely different from mine, but the only extruded powders I can name that I know flow well (remember, that's a subjective thing!) through a measure are Benchmark and LT32. I suspect LT30 would, as well.
You haven't mentioned what cartridge you're loading, but I know that John Barsness has decided that he likes Ramshot Hunter in the .30-06 as much as H4350. I used some Hunter several years ago, but I couldn't even tell you what I did with it BUT I can tell you it flows through a measure like water.
God I am hating caliber threads more and more