I have been wanting to try a speed loader on my .54 Pedersoli Tryon but due to the outrageous cost of the commercial model here in Australia I have opted to make my own "po boy" model.
here is why I am not buying in Australia.
http://zoxoro.com.au/Products/Tools-...alm-Saver.html
I found some 12.7mm (1/2") ID PEX water pipe at the local Bunnings ( similar to your own Lowes)
I cut it into 60mm (2 3/8") lengths which I placed in a collet chuck on my lathe.
A small section of the OD was skimmed to fit 16mm (5/8") push on chair leg tips.Care must be used to make the OD fit snug enough to stop the caps dropping off too easily and yet not too tight.
The bore was enlarged to 14mm with a twist drill and the internal feather removed with a hobby blade.
I have only capped one end of each tube for powder. My cheapy speed loaders work like a charm.
the next challenge is to make a string or fine tie wire to avoid losing the caps.I will experiment with hot and cold glues on the plastics.
It should work on .50cal as well. No idea on other calibers.
I apologise for the poor photos but its the best I can do with an iPod.