Single 10 is going take you a while to reload, and you gotta push that plundger a bunch of times too unload.
I actually find the Single Ten (& Six) to be quicker to load than the MKIII. Once you do it a few times you realize it can be done fairly quickly. Loading those little 22 magazines are a PITA to me.
Unloading the single actions do mot take as long as some may think to unload it, but it deffiantely is not quick