Not a fan of N350 for this use. I've worked with quite a few powders over the years with 9major including N350, 3N37, 3N38, True Blue, HS6, WAC, AA7 and now SWMP.
I like the feel of 115's best in open, so this limits your powder choices a little more. Less dense powders like N350, 3N37 & 3N38 are compressed quite a bit, and this causes problems with holding OAL (rounds lengthen after being loaded) and getting the PF you want as well. I experimented using a powder ram in the early days and it caused more problems than it solved (reduced case tension on bullet).
True Blue & WAC are the cleanest I've used with 9 major / 115 loads that can easily make 170PF.
My back to back testing with identical PF SWMP & AA7 loads feel identical to me.
I've seen as much variation (charge required to make X PF) between different lots of the same powder.