A few years ago, I picked up a great deal on a MEC 650 progressive shotshell reloader. Now I've been reloading metallic cartridges for decades, but shotshell reloading is a whole nother animal.
That MEC 650 will flat crank out the shells, but the downside to it is that it doesn't size them. Not a big problem for me since A) I only own and shoot pump-action shotguns and B) the MEC Supersizer will make fast work of sizing the hulls. Yeah, it's another step, but time spent in my reloading shop is like Calgon time.
So, back to a very useful tip on shotgun shells. It's called "cut shells" and what it does is effectively turns the standard number eight shot dove load into a devastating 70mm Glaser type slug.
Barry explains it on the video and the demonstration--and after effects--are hard to argue with.