None of my rounds have been squib type of rounds all have real recoil to them. I think the gun weighs about a pound and a half.
My first 12 reloads were the minimum recommended load for a 200 grain lead bullet using Trail Boss. The filmed rounds had about the same recoil as a 9 in a plastic gun or 38 in a steel snub. After making the video, I shot factory 255g Winchester rounds just for comparison in the derringer. They are noticeably stronger.
The gun was purchased used at an excellent price and the caliber is what it is.
Last night after work I shot my 8" gong at 40 foot 4/4 times, standing using a two hand technique. I was shooting 230 grain lead bullets using the same load of trail boss. The primers were getting flattened out. I shot my Chrony a few weeks ago and haven't replaced it. I can't tell you the velocity but the recoil was more.
I really like the 45 Colt round. I only shoot it in a revolver and my pocket gun. I bought a box of shells 5 years ago for comparison but all my rounds are hand loads 90% are lead. I too would not have a use for 45/70 in a hand gun, the 45Colt can rock me when I use a Ruger load in my blackhawk. Docand. I like your American Derringer.
In a defensive gun fight , car jacking, assault, rape, all guns are belly guns. No argument there. Mr Layton, I read a couple of weeks ago about your choice in a pocket guns, I don't remember the details, do you have a link to your thoughts.
The derringer is small because it has an extremely compact reloading system. Of course that is it's Achilles heel. Mine has a full 3" barrel and no cylinder gap.