If you hand load exclusively, I'd leave it, especially being an AI. But that is only my opinion and I do not shoot much factory stuff. I'm sure others will chime in soon enough.
I like tight twist, personally, but 10 twist will stabilize what you want to shoot just fine. I've got an old 70 Varmint Sporter that was my 2nd Sammi 243 purchased many years ago (kind of a hybrid, heavy sporter barrel) in 12 twist that shoots 80 barnes very well when driven hard. Most would say that's nearly impossible, but it shoots them fine. I have other 6mms that I carry , so the Winchester is pretty much a dedicated varminter now. It's a coyote slayin' machine with VMaxs, and will need a new barrel soon...
I would let the rifle decide. But that's just me.
