In 55 years of handloading, I've used all the IMRs mentioned and now stick with the H versions of 4895, 4350, and 4831. I see no need to go back unless there is a shortage and the Hodgdon powders were not obtainable. The IMRs have a very long history except for IMR4831. I don't think it was available to handloaders until around '73 or thereabouts.
