AndyC wrote:The cases themselves might have swelled a little, but it's more likely that it's the Winchester brass rims that are sticking in the chamber - they're becoming (in)famous for that.
You could cut the shells open, dump the lead pellets into a tray for later melting, dump the powder onto your roses or whatever as fertilizer - and pop the primers before throwing them in the trash.
Andy suggestion is the best way to dispose of them. If you reload you can save the shot or melt for bullet casting. I found a bunch of my dad's paper hull Peters shells made before WWII in the cellar of his parent's house in NYC about 1958 and used them right up to the late 1960's to duck hunt. I guess I was just lucky.