Sometimes handgun-to-rifle chamber adapters are not available for a desired cartridge. I prefer all of my adapters to take the .32 H&R. [text continues below] When necessary I use a .32 H&R finish reamer to lengthen the adapter's inner chamber. In this video I am reaming a 7.92x57 adapter that originally took .32 ACP. I usually have a depth-stop ring fitted to the reamer, but I removed it here for clarity. The reamed adapter still accepts the semi-rimmed .32 ACP cartridge, and will now also take .32 S&W Long.