The 200 AB is a little bit on the long side for the wsm. You didn't ask, but may I suggest the 180 AB. I think this is where the wsm shines. After extensive efforts to get a Browning a-bolt to shoot, I finally found a load.
65.2 gr imr 4831
180 accubond
.012" off the lands
LR primer (federal 210m)
Norma brass
lands start at 2.2895". This load shoots 1" or less at 220 yards.