Tam, over at View From The Porch, had a post about how the .327 Federal pistol will shoot several cartridges – .32 S&W, .32 Long, .32 Mag, .327 Federal, and .32 ACP. She opined that for those of us scavenging for cartidges after the apocalypse, this multi-caliber functionality might have an appeal.
That got me thinking about where we’ve been and where we’re going in terms of the ‘one-gun, multi-cartridge’ pistol. (Note there’s a difference between multi-cartridge and multi-caliber.)
The most common would be the .357 Magnum – it can fire .38 Special and .357 Magnum (and .38 Colt if you somehow stumble into a hardware store that hasn’t been open since 1927). Ditto .44 Magnum, but I’ll bet there are plenty of .44 Mag shooters who have never even seen a .44 Special. The .45 ACP revolvers shot .45 ACP and .45 AutoRim. Smith and Wesson’s seemed-like-a-good-idea-at-the-time .460 Smith and Wesson will shoot .45 Colt, .454 Casull, and .460 S&W. The guys at Ruger have a Redhawk that’ll shoot .45 ACP or .45 Colt. The old Ruger single actions in .32-20/.32 Mag, .38-40/10mm, .45 Colt/ACP, 9mm/357 still turn up but you better make sure not to lose that extra cylinder. (And, really, how hard would it be for Ruger to come out with a convertible double action revolver, hm????) The Survivor/Medusa would shoot pretty much anything in the .38/9mm range but it was kind of a sucky gun to begin with. These are all examples (and, yes, I know there are others) of a multi-cartridge gun….but they are all of the same caliber. Once you get into multi-caliber guns things get more interesting.
A multi-caliber revolver is quite a trick to pull off since a ready barrel change would be required and thats a feature found on very few revolvers. (Looking at you, Dan Wesson.) But, when you get to automatics, its a different story. Ruger had a P89 that was a ‘convertible’ that let you swap between 9mm (.35 caliber) and .30 Luger (.30 caliber) with just a barrel change. HK had a switch barrel auto back in the day (HK4) that let you shoot .22, .25, .32, and .380.
The larger Glocks lend themselves to this sort of thing and I have seen setups where people will have a Glock that can toggle between .40, 10mm, and .357 SIG. When it comes to autos, the real bottle neck is the breechface…the cartridges often need to share a similar rim diameter.
The undeniable king of claiber conversions is the Thompson Contender which is a single-shot but has no equal in terms of versatility and potential caliber changes.
Its an interesting things to ponder….what pistol would give you the highest odds of finding ammunition for it in a crisis? There are people who are quick to point out that if a fella had a 10mm, .38 Super, .40 Smith, or .41 Magnum he could probably have found ammo during the last ‘ammo drought’ when 9mm, .45 ACP, and .357 couldn’t be had for love nor money.
There is a little merit to that. Problem is, if the caliber is obscure enough that people leave in on the shelf during a crisis then it is probably obscure enough that most stores won’t have any of it in the first place. Sure, your local Cabela’s will probably carry .38 Super but the local KwikeeMart probably won’t…so you’re back to square one.
What would be the most common calibers to find for your pistol in a world gone mad(der)? For the autos, I’d think a man with a 9mm would have an easier time of it than a .45 ACP devotee or .40 S&W fan. In revolvers, I’d say the man with a .357 would do pretty well for himself.These are, of course, centerfire cartridges. Probably the most ubiquitous ammo will be .22 LR and having a couple pistols and rifles chambered in that cartridge would be a paramount idea. And, yeah, .22 Mag or .17 Whatever is a zippy little mofo but you’ll find a hundred or more rounds of .22 for every round of any other rimfire you come across.
Of course, some folks figure any cartridge will work if you stockpile enough ammo for it. Well, yeah, that’ll work….if you’re never away from your supply, if your supply remains safe and secure, if you’re supply can last you for your anticipated lifetime, if if if…..
This, in a roundabout way, gets us back to one of those classic survivalist discussions about ‘cartridges for the end of the world’ or some similar hot-stove-league topic. I settled that argument, for me, years and years ago. I’m confident that, given the chamberings of my pistols and rifles, I’ll not have the worst time trying to find ammo down the road.
I was about to say that someday someone will come out with a modular pistol frame that will enable a broad spectrum of caliber and cartridge swaps. And then it occurred to me that we are probably 90% of the way there with SIG’s 320 model that uses the fire control group (FCG) as the legally-defined firearm, letting you buy all the barrel/frame/slide/mag combinations you want without the hassle of federal paperwork.
Hmm. I should investigate that a bit. I’m sure the aftermarket will be jumping onto that platform and getting us all sorts of barrels and whatnot. Hmmm.