Like JE, I'm a Mark V lover so yes I am biased that way.
I live in Weatherby Town (Paso Robles, CA) so parts and service are non-issue. I have a local smith who will thread and chamber barrels but is teaching me to do my own.
But
For your application, a Mark V might be overkill Price and strength wise.
I visit Weatherby often enough to know that they are concerned with the +MOA accuracy question in the Mark V line. We, who use and work on Mark Vs, know the issue is the barrel and forend barrel pad. Changing out the factory barrel, bedding and floating usually do wonders for the rifle. The only place this seems to not work is with #1 profile barrels. They seem to benefit from the dampening of the whip when touching a pad. Go figure.
The Accumark is bedded and floated by the factory and uses a #3 profile fluted barrel. I believe at this time they are Criterion button rifled, fluted.
A Mark V should shoot. Mud had problems and as with anything there variations from item to item. Happens with all manufacturer, not just firearms though it is more obvious with a firearm.
So yes, I would go with a Weatherby Mark V but as a recommendation, look at the Tikka and Browning as well. I've been behind the trigger on a Tikka T3 (lite) in 308 and it shot the cheapest non-surplus ammo into a small cloverleaf at 100 yards.
Share if you dare, what your choose for your fare.