Ruger has a sn function on their web site.
You will have to contact Ruger or look it up on their website since you don't provide the full sn.
580 is the newer version of the Mini 14 Ranch, minor engineering changes, improved accuracy, etc.
Ruger will send you a manual if you request one.
Semi automatic rifle made by Ruger.
Your series 197 Mini 14 was built in 2004 (or later) by Ruger according to their own website. Look up when your rifle was built there. I purchased a series 197 Ranch rifle in 2005 for around $550.00.
100-435 USD
You must contact Ruger to avoid voiding the warranty for a correct answer.
Good
Best left to a trained factory representative.
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.
This gun is made by Ruger and is available in the ranch rifle of standard version. Also a target version with a barrel stabilizer.