Many years ago, I received 8 rounds of full metal jacket 250-3000 ammunition from an old lighthouse keeper in British Columbia. They were made by CIL and had the "D C" Headstamp. I will have to dig up the last one remaining and post a picture if I can find it. I recently gave one to "Smellie" for his collection.
I can see the 30-30 and 250-3000 (250 Savage) issued hard ball ammunition for the Western Home Guard and Militia Units such as the Rocky Mountain Rangers and the Pacific Coast Rangers as these were two of the most common rifle calibres at the time when rifles and ammo were scarce and most of these people supplied their own rifles or, before 1942, could order these "civilian" rifles from the USA.
I also recall a conversation with one of these old boys, as he was issued FIVE rounds of ammunition, and told "If the Japanese come, fire your five rounds, then run like hell."