If so, please post your results. Inquiring minds want to know.

Nope. Used RE-15 on Woodleigh 350 gr. PRP with good results, though. My go-to on the .375 is IMR 4350.

Don't have my data with me but RE17 turned out to be a fantastic powder for the H&H especially 300 and 350s of mono or semi-mono deisgn (that take up more powder space). IIRC, a 350 at 2450 (26" barrel @ < 58KSI). It also kicked butt in 338 Win Mag and 348 Win. Basically anything that starts with a 33 thorugh 37 and 4350 is an appropriate burn speed but just won't fit, RE17 is going to be the first powder I look at.

As of this moment Alliant Powder does not have any recipes listed for any .375" cartridge on their web page (see link below).

http://www.alliantpowder.com/r...der.aspx?powderid=25

Too bad I would like to try it. I would think Alliant would get on this right away after all they want to sell powder.

Alliants comments on Reloder17 say it's designed for the short magnums
I allways thought my 375H&H was short enought , they also mention it has a burn speed similar to IMR4350 I was hoping for a powder burn rate faster than that but slower than R15. I guess I'll have to wait till R16.5 comes out or one of those magic powders that Hornady uses in their Superformance line of ammo is available in retail canisters.