The magazine well (mag box) CAN be easily removed and changed. Most of us here use a screwdriver and hammer. DO a little research to get the details. If you go to a 6.5x55 you may have to change it, if there is a baffle in the factory one, for the smaller 243 cartridge. Going to one for a 270/30-06 cartridge will give you a LOT of flexibility in bullet seating for the Swede. But, if yours does not have the baffle, there's no need to swap it out.