The US model 1898 Krag Jorgenson rifle was chambered for the 30-40 krag cartridge.These are still loaded by remington arms company.
Have a gunsmith check it out. Should be 30/40 Krag
The correct ammunition is 30-06 Springfield.
As long as the +p is SAAMI approved ammunition
yes. the 5.56 is the 223 caliber ammo.
No. You will have to have a Model 1895
Depends on markings on upper.
Yes but I would only shoot those loads with a 55gr.bullet or lighter.I believe the smith and Wesson model 1500 has a twist rate that is not made for the heavier bullets found in todays .223 ammo.
Yes.
38 Special. Stay away from +P
NO
These were made for Gamble's Stores by Savage, and are caliber .22 LR.
It must be marked on the box "FOR USE IN ALL RIFLES"