I had a chance to test fire the Rossi .410 revolver shotgun last weekend. Not much kick, easy manual of arms. Brenneke 3″ slugs cloverleafed at 15 yards, which was expected. Tried S&B five-pellet 00 (actually .31″) buckshot…mostly horizontal dispersion right of the point of aim, and the casings wouldn’t come out of the cylinder. Tried that ammo in a .410 Saiga, had to use tools to get the casing out after the first shot. So thumbs down on S&B. Brenneke 3″ through the Saiga also cycled fine and also cloverleafed (at 25 yards with a 4x scope).
The bag is just a nice, well-padded way to carry a 16″ AR with spare mags, or something like the Circuit Judge. It’s generic enough to attract little scrutiny.