Check your Snub. I have a 642 and most speed loaders don't work. I carry 2 Bianchi speed strips and practice the Ayoob method with just 5 rounds in the strip. Good luck. 5 Star firearm has a speed loader that works great on a 642 type snub. Going to but a couple and try 'em out.
While Speed Strips are certainly a handy, organized, and compact way to carry spare ammo, they are most certainly not very speedy for a complete reload. When I still carried a sixgun as a duty handgun, I practiced reloading with speedloaders, with Speed Strips, with cartridge loops on the belt, and when that innovation arrived, with a 2x2x2 carrier. The Speed Strip is the SLOWEST of these for a complete reload, but its handiness is worth it, in my opinion.
One reason I love the Speed Strip is that it is a VERY fast and sure way to get TWO rounds into one's weapon. I believe that if one's revolver is totally empty, two very fast rounds may well trump a complete reload that takes longer.
Of course, my preferred emergency reload is made of stainless steel, and is made by Ruger; an SP101!
My reload is my Keds. I'm bringing more than my handgun to take on Zombies.
I've carried a 5 shot J frame 38 Special since May 1971. In all that time I've carried at 4-4:30 o'clock, either IWB or OWB. I carry two Bianchi® Speed Strips™ rubber banded together in my right year pocket. Additionally I carry a HKS® #36 Speed Loader in each front pants pocket. In colder weather I carry the gun in my inside left breast jacket pocket with speed loaders and speed strips in the outer jacket pocket(s).
In over 41 years of carrying, drawing, shooting, and reloading my J frames I am very confident in my abilities with same.
I just carry 1 extra magazine ... 15 + 1, + 15 = 31
I think that reloading with those strips uses fine motor skills. Even with enough practice to develope so-called "muscle memory" your fine motor skills break down once you get into the survival mode. If your life is threatened, your body will automatically devote more juice to essential survival motor skills, and the fine motor skills, (fine details accomplished with finger movements and manipulations) are degraded. S
...realistically, I think that if ammo supply is a concern, then the threat you anticipate facing may involve a protracted gunfight. If that's the case, then a high capacity semi has to be your tool of choice. If it jams, clear the jam... That's a task that uses gross motor skills vs fine motor skills. And anyone using any type of gun other than a single shot shotgun, a double barrel shotgun, or a revolver has to learn to clear a jam...
Carrying an extra mag is at least as much about reliability as it is about more ammo. To each his own, but I would not want to be out an about with an auto-loader and a single mag.
ETA - looks like Matthew03 had the same thought I did. I was answering g as I read the thread and noticed his response above mine. I guess great minds think alike. :)