I realize that the two powders are not identical. As best I can tell from my research, IMR4350 is a bit faster than H4350. That said, if you have a load expressed in H4350 that you want to convert to an equivalent IMR4350 load or vice versa, how would one do that?

Specifically, I am trying to find out what an equivalent load would be in H4350 for 95 grains of IMR4350. Thoughts?

I have found that you can use IMR 4350 load data to load H4350, but not the opposite. And even Accurate Arms 4350 is different. One of their ballisticians told me a few years ago that their powder was a grain slower than IMR 4350... I found that to be absolutely correct.
And different lots of the same powder can vary a bit.

I would start at about 92 grains of H4350 and work up slowly. Good luck!

contact Hodgdens and ask them....they are distributor of both of these powders.

I have also found H4350 to be just a bit slower. There is no conversion factor because each cartridge responds diff. to each powder. What cart. are you loading for w/ 95gr???

.500/.416 NE.

African Hunting Info lists a load for the .500/.416 NE with a 400 grain bullet of 91 grains of H4350. Someone else gave me a .500/.416 load for a 400 grain bullet of 95 grains of IMR4350. I am trying to see how the two compare.

I figured as much, only thing holding that much med. powder must be a .416rigby or sim. I would drop 2gr & work back up. They are very close in burn rate. You might want to give RL19 a try. I have been using it in my .404jeffery w/ great results under 380-400gr bullets. It's a bit slower than IMR4831.

They actually say that RL22 works well with the .500/.416. I just wish there was more available loading data for the cartridge, it is like trying to find a needle in a haystack.