Wesley H. Allen said:
7.92 x 57mm Ball, just watch what you buy. 1950's ammo or older is fine as long as its been kept cool and dry. There is heaps here in Australia, mainly Turkish, so if its here, it will be in Canada too. Try MARSTAR or Wolverine. Should be under .25/pop in lots of 1000, plus shipping. Anything under a 1000 or crate as per say, will not get you much of a deal.
Remember this old stuff is most likely Berdan primed and CORROSIVE, so give the good ole 98K (or whatever you have) a good pull thru and clean afterwards.
Regards,
Wes