RE: Limbsaver items for guns??
I have the limbsaver recoil pad and the barrel deresonator on my 30-06. The recoil pad helped the most, and if I spent more time with the deresonator I imagine it would help more too. From what I understand, you're supposed to find the "sweet spot" on the barrel for it by shooting a group, then sliding the deresonator, and shooting another group until you find the spot where you get the best group.
I never did that, I just put it where I thought it looked best.