Improvised loading strips
I recently discovered that a .308 or .30'06 stripper clip nicely holds five rounds of .41 magnum ammo. Not a full reload, no, but how often do you shoot a cylinder empty in the field? Two clips, ten rounds, fit in pockets more neatly than one round speedloader.
The exposition by friend
BluesBear notwithstanding, I long ago found that a 1911 magazine makes a decent last effort reload. For over a year while on the street, I carried a S&W 1955 Target revolver (Pre-model 25) cut to four inches. Required to carry a six- or 12-round loop slide on the duty belt, I had one for six .45 Auto Rim rounds, and a custom made belt pouch for two half moon clips. I really figured any festivities would be over by the time I worked through 18 rounds, but I usually had a 1911 mag in a pants or jacket pocket. I DID practice on the range with it, and found I could thumb the cartridges out of the mag more rapidly than I could load the AR from the loops.
True, once the ACP ammo is fired, it takes a little while to extract them, but, hey, if that's the last ammo on your person, a rapid reload is a moot point.
Years later, a gunwriter friend told me that a couple of the participants at the Shootists' Holiday were using a mag for reloads of their ACP chambered single actions. I later saw some photographs of this in one of the publications.
FWIW - - - -
Johnny