[Drdogface]

The fact that it's a "flat bolt" means that it's an original Model 93 which was made in a few calibers up until the early 1900's. Many were 30-30. Certainly a more valuable gun than modern Marlin 30-30 with the designation of Marlin 336. Keep it and shoot if you like. IF it says "Black Powder Barrell" on the bbl near the receiver then don't use modern ammo. Back then, steel was not properly hardened to accept modern ammo. Actually not until WW-I was it really hard and safe.

Other more qualified gun gurus will comment...