4350 and the Bob were made for each other. I use 43.0 grs with 115 NBT's for around 2740 FPS in my 22" barreled Ruger. Any more powder and the groups open up.

4350 is a great all around powder. I usually use H4350, but also use IMR4350 in a couple of guns. Works in virtually all of the 30-06 based cartridges, several of the 308 cartridges and works good in many of the belted magnums. If most of your guns are in the 06 and magnum class, this powder should always be on your shelf. If you only shoot 223 and 308. Varget or TAC would be a good choice.

I have never had an issue with substituting H4350 for IMR4350. The difference is that H4350 is less temperature sensitive and is cut shorter, which makes it flow better and more consistent through a powder measure. H4350 is by far the most popular powder in use by competitors on the PRS, one reason there can be shortages from time to time.

I am only basing it off the fact they're not exact. No doubt that charge weights would likely be pretty dang close, and results fairly similar. I would have thought Varget would have dominated that rank with all the 6.5s and 308s.