The 87 series is an interesting rifle. Savage tried for YEARS to make it function with S, L and LR, but could never get it to work right. That's why there's 87 through 87 T series shown on the Numrich site. With anything but LR, it's a single shot. Also, the slots on the sides of the action are from back when .22 ammo was wax lubed. The slots are there to allow the wax to be blown free. Also, it doesn't operate quite like other semi-autos. When you fire it, the bolt moves back and stays there until you release the trigger, and that's by design. Has to do with giving things enough time to allow the next round to move up into place to be picked up by the bolt.