michael_d,

My friend shoots a 325 WSM, but in a regular A-bolt, so the gun is a good 3lbs heavier with bi-pod. Pretty good kick on that one so I'd imagine you would want a decent hold on the 5.5 pounder. Sucker does hold a line good though. I'm a wuss when it comes to recoil, so .270 Win in a 7lb rifle is about all I'm good for. After 20 rounds or so I'm starting to think aobut the recoil a little, so I just pack up at that point.