CF issue "battle packs". DA(Dominion Arsenals. Also seen as DAC.) ammo was very good stuff. Reliable and accurate. Far better accuracy than the crap IVI made. Not exactly collector grade stuff, but it might have been. Not ever after you opened it though. The NATO cross means NATO standard, not accept. None of that matters at all. It's great ammo that used to be maybe collector stuff before you opened it. Very heavy on the 'maybe'.
The plastic packs were not re-used(the idea was to pull down on the wee tab to open the pouches and fill the mag via the stripper clip guide on a C1A1 or C2). Nor were the clips meant to be reused(Class C stores. That's stuff that was not expected to be returned after use), but they can be. Any .30-06/.308 based cartridges(.243, .270, etc.) will fit with no fuss. Handy way to carry hunting ammo in your pocket.
No hunting with military FMJ's in most Provinces. Lot of clubs don't allow 'em either thanks to the twits who just empty mags.
If you can't re-sized it, you're doing something wrong. Likely not enough lube. DA and IVI brass is highly sought after, well it used to be anyway, by reloaders. Has crimped primers though.