I pick Varget. It covers about every cartidge from 30-30 to 7mm Rem Mag. The limitations are that it doesn't work with all different bullet weights in every caliber but it has data for more cartridges than any other powder. Hodgdon lists data for 90 different cartridges from .17 Rem to .50-140 Sharps.
Just wish I could find it more often. Usually out of stock. Always buy some when available.
Edit: Hybrid 100V is almost always available and appears to be a good performer in all three of the OP's chosen cartridges in bullet weights that are typical. Supposed to be in between 4350 and 4831. I have been thinking about this one as an alternative to all the more popular powders that can't be found when you need them.
Last edited by UncleAlps; 07/25/20.
