About the only way a bipod will scratch your stock is if it has no pad between the metal and your stock, or far more likely, you either tighten it too much or too little, resulting in it being able to move/rattle around and rub the stock. If you're concerned, get some "moleskin" like bowhunters put on our bow risers on the part of bipod base that meets the stock. Just tighten it snug and I'm sure it'll be fine. You MIGHT want to consider switching to crossed shooting sticks. I switched to them years ago as they offer MUCH wider range of height adjustment, don't add weight to the rifle, fast to use wether from sitting, prone, or standing, and your rifle is still comfortable to carry, without bipod in the way when your rifle is slung. There's all kinds of shooting sticks on the market, surely you can find a set that works for you.