RE: .300 WM Or .300WSM
After shooting a 4.5 pound single shot 12 gauge with 3 inch nitros....gimme the heavier gun. If it gets heavy I will take a break and set it down for a while. The memories of getting smacked upside the head by that thing are NOT pleasant.
The moral to this story is unless you are impervious to recoil...weight is our friend when it comes to big guns. Easier to hold steady, less felt recoil, and remember anything heavier is almost always more durable.