[jester]

Some things like mortar rounds can not be reloaded, as the entire round is consumed much like that of a rocket launcher.

As for auto cannon rounds some are electronicaly fired which would pose a problem in the T2K world.

Large caliber gun round, much like the mortar the round or projectile is loaded then a bag of powder or charge and the entire thing is consumed.

As for large caliber gun fixed shells like tank rounds, such rounds are more complex, especialy the projectile. Where the round is made up of several internal components, these I can see being made, at least simplier rounds such as standard HE or HEAT rounds and probably some form of beehive or flachette round which would be like a giant buckshot round, these I can see being more common as reloads since the threat from armor is dwindling as more are lost on the battlefield and the threat of personel is the last main threat, of course tank crews would hoarde their last few anti tank rounds just in case and only use them grudgingly.