The OP said they were .32 S&W Long; that is obviously not so. Goforth says they were made for .32 H&R (aka .32 M&H).
I have always been confused about the .32 H&R. Goforth mentions it in connection with the very first top breaks, but does not show a catalog mentioning that caliber. Later catalogs show either just ".32 CF" or clearly state "S&W" cartridge.
I know of no H&R revolver that is marked for .32 H&R, though I would like to see one.
The older H&R .32 revolvers I have seen have seen have either no chamber shoulder or have a shallow one that is farther out than needed for the .32 S&W. My guess, FWIW, is that the cartridge was made for M&H in a special length. (Due to the way the M&H works, case length is critical and .32 S&W is too short to function properly.)
Then, H&R discovered that the more powerful M&H round would fit in its revolvers and got the ammunition makers to list it for the H&R as well. But (again, MHO) there were no H&R revolvers specifically made, stamped or advertised as being for the ".32 H&R." Goforth does show one box label for the American Double Action reading "C.F., H.&R. Long 32 or S.& W. Short Cartridges", with the "32" larger, but box labels are cheaper than steel stamps.
Thoughts?
Jim