Good deal. I would have bought it no matter what twist.

You just cant shoot bullets heavier than 140 gr.

If you want to shoot the 162 gr amax you can always sell your barrel and buy a 1:9 twist factory barrel.

Midwayusa has 7mm-08 A+B 24" barrels on sale for $118.
They are 9.5 twist and will stabilize the 162 gr amax.