See my post on C238 metal ammunition box.
When I first went down to the scrappie I was only interested in getting some modern boxes to transform into WWII equivalents with some paint. When I opened the boxes that were there I discovered ALL the packaging was still present and that gave me the idea of buying one of each of the best examples I could find. I bought 4 different ones in total and I'll do a write up on each of them. I even found some security tags on one box. I didn't do ammo in my time in the RAOC, its a whole different accounting procedure, and i don't profess to any expertise or authority on the subject.
As a whole I think having an ammunition container accompanying the ammunition just fills out and enhances it more. Prior to joining BOCN I had no idea that people collected it. But with everyone renovating and refurbishing their items to such a high standard, have the associated packaging can only enhance the effect.