Who used it in what loads, and what is it similar to?

Works great in my 338-06. I have also used it in the 300SAUM with good results. Also worked well in a 7-08 with 140's. Seems close to R-15 in my guns.

I've used it in 30-06, 300WM, 22-250, and several short mags. It's a pretty decent powder, sort of in between 4895 and the 4350s. Doesn't seem to give top velocity in some carts, but it does quite well in others.

I prob will not buy any more as it seems the 4350s works just as well.

Does very well in my 708 with 120`s and 140s. Burn is just a touch slower then varget

Gave fastest ever recorded velocity with 55 Gr. bullets in my 220 Swift. Accuracy was only mediocre though.