I predict anyone shooting a hundred rounds through a derringer would be ready to move on to something else. Not much you can do even plinking with one; you're just pulling the trigger to hear it go off.

Even with "serious practice" on a B27 silhouette, how many times you want to run that drill ?

Not knocking your derringer ( I have a High Standard 22 mag that has its place in the battery) . . . just reinforcing the idea that it's doubtful too many folks ever shoot one enough to wear it out.

Shoot the .32 longs until you can find the more effective mags - just clean the chamber good before you switch so the magnum empties extract easily.

__________________
Qui plantavit curabit