As long as it's the correct caliber, yes.
UMC refers to Union Metallic Cartridge company. They are owned by Remington and only make ammunition not firearms.
Have about 250 rounds of this UMC REM 30 ,,,,, 30 remington
Yes, but I wouldn't fire more than 100 rounds before at least cleaning the pipe - UMC's ammo has proven (to me) to leave excess residue. The aluminum casings were not a problem.
UMC is the company that made the ammo- Union Metallic Cartridge Company. But we do not know who made your rifle- Marlin, Ruger, Winchester, etc. Please repost with the Make and Model, and we'll try to get you an answer. Sorry-
Yes. Loading in too much ammo can actually jam your gun.
Tales of the Gun - 1998 Bullets and Ammo was released on: USA: 1999
No, and you can't drive a car with no fuel. A gun is a device to launch ammunition. You can "dry fire" a gun with no ammo, but that is not good for SOME guns.
Gun shops, gun shows
A UMC CAN'T be circa 1903, it didn't become Remington UMC until 1912. I believe by the time UMC took over the model was on the receiver, it's probably a model 12 or possibly a later 121 if it's not quite as old. The value is GREATLY dependent on the condition, condition, and the condition, and of course which model and variation.
Buy it
It can.