My Hornady 9th edition lists IMR-4350, but some manuals actually list data for both IMR and H.  The difference between IMR-4350 and H4350 are really negligible - 40 grains either way.  There are slight differences in formula, and if one wants to get down to brass tacks, the burn rates are ever so slightly different... but not to the degree that you or I would see at the range doing basic shooting/plinking.  You would have to get out a chrono and get all OCD to really discover one's superiority over the other.

My load is with the IMR-4350.  I'm loading a Hornady 220 gr RN Interlock bullet over 40.0 grains of IMR-4350.  Historically, I've been using a CCI-250 Magnum primer, but I'm going to switch to either the CCI-200 Standard, or a CCI #34 Mil-Spec primer.  The 250 gives me great consistency, but this last match, I had a couple slightly flattened primers, so I'm concerned about possible excess pressure. 

Another helpful hint I can give you towards preserving your brass would be to anneal your case necks!