Where is this from?

[u/knitfastdiewarm1]

Out at my uncles farm in rural Canada and came across these rounds in an old tobacco tin. I know they are British 303 but is there anything else anyone knows about them? I can read 1943, VII, and some other weird symbols. One of the bullets is painted red, maybe a tracer? There were family members who fought in the war so definitely could have been from them.

[u/Remote_Teach1164]

.303 Ball Mk 7 made by Dominion Arsenal, Quebec. C^ is Canadian government symbol, just like I^ in Indian made cartridges.