Looking at prices on Ammoseek and non-availability at WM and other places for shotgun shells, seems like just keeping in practice for muscle memory, pumping, etc. gets to be an expensive endeavor. One thing I've done is buy dog training poppers - primed empty Fiochi half brass training rounds with primer-only. They load and cycle like regular shells and give that bang.... any of you out there done this? I just got 200 more of them for $51.94 shipped from a gun-dog website...