Assume you have (in inventory), 2 snaploaders, at least 2 shells, and a shotgun
Outcome 1: Can't reload the weapon.
1) Pick up empty shotgun
2) MC (won't do anything, need to relaod manually)
Outcome 2: can't load shells, but can load snaploader
1) pick up empty shotgun
2) load snaploader
3) MC (even if you have 2 snaploaders, nothing will happen)
Outcome 3 (ideal): be able to reload shotgun with one snaploader
1) pick up empty shotgun
2) load with shells
3) MC (you will be able to load ONE snaploader)
4) reload snaploader
5) MC (you will be able to load shells)
6) load shells
7) Repeat from step 3