Screech, go with a 1-9 twist for the 105's and 107 VLD Bullets. You could go with a 1-10 twist, and you could shoot the 75grn and 87grn V-max's as well as the 105 and 107 type bullets. But if you just plan on shooting the 105 and 107 bullets, then go with the 1-9 twist.
I have an 8 twist Rock/ABS 6-284. It will stabilize the 87 gr. V-Max but blew up the 105's at 3300 fps. 107 SMK shoot very well and don't blow up. Don't know what this means to you but a little less velocity would sure help the A-Max as it shot extremely well in my rifle when it didn't turn to smoke.