I'd bed it first. I've had one M7 in 7-08 and it was very accurate even tho it had the 18.5" barrel and was very light.
I bedded mine but left the pressure point in. I can't remember (rifle has gone down the road) but I may have added a pop can shim to the pressure point to make sure I had good contact. That might be something for you to try after you bed it.

Aim for the exit hole.