Iwould think H4350 would be in the top 5 for each of those calibres.
Basically...you're correct. In fact, I expect to see a lot of people answer 4350. For many years it was the "standard" powder of most all that shoot guns chambered for '06 case rounds and belted magnums. Whenever my father gets a new gun in the .243-.338 range...invariably he'll begin his loading with H4350. I took some of his loads from when I was a kid and started playing with R-19 and R-22...and whatever he could do with 4350, I could better with R-19 or R-22 velocity wise, and almost always find an accurate load as well.
In fact I think Id put H4350 as #3 on my list.
