4320 and 260

[6.5BR]

Anybody using? If so, what bullets work best? Guessing 123-130s more than 139-142s.

Any info on accuracy and speed w/bbl length appreciated.

FWIW, I do have 4350, etc. but alot of 4320 to burn up and got out of 7/08 and 338/06 for now. Looking for a good application.

Thanks.