Hey guys! 
In my journey to learn all about police revolvers I know this board has so many knowledgeable people, including lots of retired (and active) LEOs, many who have used revolvers on duty. I am wondering today about cartridge loops or cartridge slides:
Of course, these have been around since the 1800s, ever since cartridge revolvers have been invented. But from my reading, it seems that even well up into the 20th century, departments were still using these? I know the dump pouches and later on speedloaders became popular, but did cartridge loops continue in use by some agencies and if so, for how long?
Just curious about the history of these items. I know holster history is a massive topic on this board but curiously, it seems accouterments like these aren’t discussed all that often.
Thanks all, and especially thanks to those brave lawmen out there! Your service is GREATLY APPRECIATED.
-Jay

In my journey to learn all about police revolvers I know this board has so many knowledgeable people, including lots of retired (and active) LEOs, many who have used revolvers on duty. I am wondering today about cartridge loops or cartridge slides:

Of course, these have been around since the 1800s, ever since cartridge revolvers have been invented. But from my reading, it seems that even well up into the 20th century, departments were still using these? I know the dump pouches and later on speedloaders became popular, but did cartridge loops continue in use by some agencies and if so, for how long?
Just curious about the history of these items. I know holster history is a massive topic on this board but curiously, it seems accouterments like these aren’t discussed all that often.
Thanks all, and especially thanks to those brave lawmen out there! Your service is GREATLY APPRECIATED.
-Jay