I purchased the Savage Mk. 1 single shot rifle 3 years ago, and it was accurate and reliable. I sold it as it was a pain to keep putting the cartridges in single shot, and the bolt kept getting these nasty deep scratches. Have read this is common with the Savage rim fire rifles, it is like the receiver was not machined properly, but I could not find any burrs. Also, the bottom part of the bolt was wearing fast, this must be an issue as the factory had used a pin punch to check the hardness of the bolt.
Fun shooter otherwise, ended up putting a scope on it, but the open sights were ok.
