50-225 usd
Depends on the store.
Yes, Ruger made them
50-200
Ruger.
Ruger's web site has extensive sn data.
75-300
Depends on what caused the jam.
Check the receiver and barrel
The Winchester Magnum Rimfire is a larger round, and is capable of producing twice as much energy as the .22lr. I do believe that Ruger is making a rifle capable of handling the .22WMR, but a standard .22lr rifle is incapable of safely firing the .22WMR.
Not recommended.
50-200