.410 hulls can be cut to cylinder length and loaded with half length overpowder wads, small shot and a glued in overshot wad. They are too thick for any type of "crimp". They function just fine. They are a pain to make. They are more than useless with .410 slugs (if you ever found any), what with them striking the barrel wall only on occasion during their trip and all of the gas pressure blowing past them. A good Whammo Wrist Rocket would serve better. .45 bullets will not fit in the .410s due to the very thick walls of the cut-off hulls. Brass hulls may work better, but usually coming from either Australia or Brazil, they are somewhat more rare and expensive than Colt brass and usually use a rifle or pistol primer rather than a shotshell primer, defeating your purpose. You can load shot loads in Colt brass more easily, that will perform as well, or better, with far less work and time invested. Actually, don't tell anyone, but you can buy CCI shotshells ready to drop in, with no work involved other than paying the clerk. This is a big "Been there, done that". BOL
