Ok, I am no expert, but have a 22 I plan on firing for the first time this week-end. I cleaned the barrel and will pick up ammo tomorrow. I looked at the stock and only noticed a circled P until this morning when I saw with a magnifying glass a star stamped behind the rear swivel. I couldn't find any history on this cartouche for a Springfield. The stock is a straight finger groove stock. The rifle is drilled and tapped but does not have a Lyman rear sight. Would anyone know what this cartouche was for or and if this would be considered a military training rifle, possible DCM sale or something else?

Thank you, especially for the guy here that told me what all types of ammo to try out. I think using a ladder sight will make for a fun sort of day.