Good luck with that notion! Even if there was a good candidate, it's probably out of stock. Even if available, chances are it's not going to shine in one or more of your rifles, or you won't find enough to go around. Might want to choose the best for each cartridge, a backup choice or two, and then start looking. You never know where something may suddenly pop up (!), so keep looking on a regular basis. A big jug of one of the 4350s or 4451 might do you, if you can find it.
StaBall looks really good in the 7-08 and '06, but there's no data from Hodgdon for the 7RM, either in the book or on their website. I found a pound locally, then a couple more online, as well as my preferred powder for 120s in the Grendel. While you're looking, check for primers if you need some. They can ship both in the same box and save you some money.
