Here's what I've been doing:
I'm using saboted bullets, mind you.
At the end of the day I remove the charge and bullet from my inline. The bullets, powder pellets and the cap I've been carryign around get stored separate from my "go to" components.
I use the last day's cap, or caps, to clear my nipple in the morning before loading up that days charge. So far they have all fired, even the ones I toted around on last Saturday's and Sunday's monsoon.
If the pellets look ok, I put them in a 777 pellet box labeled used. I discarded one because it got a little chipped when I knocked the charge out, and another because it got a bunch of breech plug grease on it. I'll use those pellets next year for practice. I keep my pellets in a sealed ammo can with a desiccant cartridge in it.
Not sure what to do with bullets. I may try to get new sabots, or a may just reload bullet + sabot next year during practice and see what kind of accuracy I get.
I think this is a nice compromise that lets me always hunt with a fresh charge, but also doesn't waste anything.