Actually it is fed by a 7 round magazine, not a clip. Even Marlin nor Remington seem to know the difference either so don' t feel bad. The ones I saw at Wal Mart like you described are 25 MN. I have one and it shoots great. Very accurate. As a matter of fact it is so accurate that I tend to laugh when people try to tell me the 17 HRM is so much more accurate. Just doesn' t make sense. I don' t know of any ballistics tables for a 22 WMR. What are you looking for exactly?