I have an old sporterized Mauser. I hadn't shot it in years and decided to shoot a deer with it. When I checked it on a target, it shot all over the place. 20 some odd years ago, I thought it was pretty accurate. I used to shoot targets with it, and I remember shooting a squirrel off a tree limb with it. I took it apart to clean it, and saw that the action screw can not be tightened fully due to the set screw that fits into a notch on the action screw. Seems like a loose action screw would not be conducive to good accuracy. Any suggestions would be greatly appreciated. Thanks.