2" out of a 7mm rem mag barrel will get you about -80 fps. That's enough loss for me especially when you don't have to load hot to gain fps. If your going to cut off 2" of your barrel and try to retain that 3100 fps your going to up your pressures a lot more. I could understand it if your hunting in situations where you had to shoot through heavy timber and the swing of the gun was slowing you down. But if your just packing it on your back and setting up to shoot why ruin a good thing.