Speedloaders
I've tried everything for my wheelgun (3" M-66) in terms of reloading devices over the years from cartridge loops to dump pouches, speed strips, and a gaggle of different speedloaders. What I say below is just one guy's comments...
The Maxfire were not especially useful or effective. You sort of twist the ring like knob at the end to load the bullets. It felt awkward to me. Then again, I am not fond of the HKS variety of knob twisters once seated species of speedloader either.
The old Dade speedloaders are nice enough -- but they will spill rounds if you drop them. The Safariland Comp I is ideal for CCW use. The Comp II is also a winner -- it has a bigger knob for easier push release and loading. They engage on the cylinder star for release. I've never had a Comp I or II drop rounds. Safariland only makes speedloaders in the 5 or 6-shot flavor.
You might consider speed strips if you are really concerned with a slight bulge in a pocket from a speedloader. My expereince has been that nobody notices the Comp I in my left front pocket with my keys. Nobody has noticed the 2 loaders that are in my sports coat pocket opposing my cell phone either. I also have used some nice speedloader pouches that position the loaders either split astride the belt (DeSantis A35, Hume Second Six, or Del Fatti SLC) or horizontally over the belt (Cunningham Leather), where it melts into my paunch. I am unimpressed with the simply pouches that place the entire bulk of the loader in front of the belt.
Hope this was helpful.