Fire one round and adjust sites to that impact
Have you tried their web site?
No known web site.
CMP, they have a web site that explains how to go about it.
No way to answer without the serail number.
Compare to others at a gun show, auction site, etc..
Go to Remington's web site and request a manaual
Go to Remington's web site. They have a list of repair centers.
Ruger has sn information on their web site.
Contact Bushnell
Go to this site for informationhome.comcast.net/~jimringbauer/HamiltonRiflesindex.html
Many estate and auction sites are out there. You have to check them periodically
Ruger's web site has sn data.