Tom I really don't know if the other powders make much difference at all. I gave up on 17's for a while because of the inconsistency of the the available bullets. Hornady 25 grain HP's performance on PD"S and jacks. And the fact that I got tired of the cleaning routine I had to do.
The accuracy and consistent performance of the V-MAX and finding real nice Cooper model 21 for a price I could afford brought me back into the game.
I don't keep track of round count on barrels and simply replace them when they won't shoot as well as I'd like them to.
TAC and 748 are cleaner burning than 4064 in my experience in 17 Remington's and allow longer between cleaning.
Long drawn out way of saying I don't know. Sorry
Thanks for the input...I couldn't see where there would be a big difference.
Gotta agree with you on the Hornady Vmax...they will definitely shoot better that the Hornady 25 HP, not by much, but definitely a difference. Bergers shoot well too. Im not a fan of the cleaning routine either, but I use mine primarily on predators so theres very few extended sessions with it. ( Though I cant resist on gophers once in awhile...)
