CDN 2013 mk8 in a T?

[Sunray]

"...Mk. 8 machinegun ammunition..." Nope. It's just the designation of the standard ball ammo used from 1938 and beyond. Smokeless powder load. Boxer or Berdan primed(originally). 175 grain, pointed, boat tailed, bullet. Muzzle velocity of 2440 fps.
DA made ammo was far better than any of the stuff made by IVI. Best .303 Ball I ever fired was made by DA in 1944. Shot the stuff in the early 80's.