1873 colt single action army revolver
Follow the instructions in the owner's manual.
Try e-gunparts.com
see the link below for the owners manual. The Marksman Repeater is a 4.5 .177 caliber pistol not a 5.5 .22 caliber pistol.
I have a model '66 and the round type is .25.
If you don't have a manual, find a good gunsmith.
go to the link below.
If you don't have a manual, get help from a gunsmith
If you don't have an owner's manual, find a gunsmith and ask for help
Steve's pages might have one.
see the link below for the Owners manual.
Nope. Frame not designed for that energy.
Follow the recommendations in the owner's manual.