The Main Thought is a 22LR cartridge, Centerfire, THE SAME SIZE, Not Bottle-Necked, can reload to suit your purposes, should be a lot of choices on the bullet sizes, and a Bonus, A Centerfire will have a lot nicer lighter trigger pull than a Rimfire for a Revolver, not my ball game, to old, but will be a light fast competition 22LR Revolver..

How about wonnerful 5.7 x 228 MM that is the hot rage in handguns? You just can't reload the brass.

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S&WHF 366

Tried that by reaming a K22 cylinder with a 22TCM reamer, cut the cylinder for full moons and modified TKC K frame 9mm clips to hold them. Hard ejection and kind of scary as pressure is so high. My 22 Harvey Kay Chuck works well as does my 22 Jet both with clean dry chambers.

The 22CM is actually a 22 hornet case with the body turned down a bit.

But contrary to the belief of many bottle necked cartridges work fine in revolvers if kept to a more reasonable level than the old factory Remington loads. But I believe the super jet with a straight body and sharper neck would be better

How about this idea. Take 32 S&W long (or 32 H&R) brass and put a liner in them that had a .224 ID and a .312 OD, then press cast a 55 gr 224 bullet into it and ream a 22 cylinder so a 32S&W long would fit but leave the cylinder's throats at .224. Basically just really thick brass. If need be you could easily solder the liners in the parent cases. I do not think you would get bullet jump with such a light bullet at say 1200 fps. Even at a 900-1000fps they would have more umpf than a 40 gr from a revolver

you would need to find 5/16 (.3125) OD tubing with .044 walls

You could modify a 32 S&W long reamer by having it ground so it had a long .224 pilot. You could actually do that using a mill

22 center firef would make sense IF primers were still cheap

22 LR WAS RELIABLE when I was growing up........I shot Winchester/Fderal/Remington.........I can't remember as single misfire........RF ammo like everything else is made CHEAP today with little to no QC.

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S&W Accumulator

Would it be like the wormy 5.7?

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S&W Accumulator

I have both the Jet and Kay chuck that work fine, just clean cylinders. No problemo.

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"I'm feeling MUCH better now"

The 5.7 is its own critter and the 22tcm uses 223 for parent brass

I chose to mess around with the TCM because you can get it in a 1911 clone which I have. I do not think one is better or worse, they are interesting as is the Jet and the Harvey

Having handloaded .25 ACP, I darned sure don't want to mess around loading anything smaller...

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Pisgah

That is not based on the LR and is a custom one shot cartridge. He made those from Hornet cases then changed to .25 acp . Not the cartridge in question.

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Grumpy Old Man With a Gun

Since this a wish list cartridge/gun thread I will add mine. I would buy in a minute a quality, very lightweight, long and graceful, walnut and steel. rifle chambered in 32ACP. Having cronographed factory 32 ACP ammo from rifle barrels the velocities approximate 1,200 fps. I could not think of a better small game/ small varmint rifle. For me anyhow.

I've thought similarly.
Only that the cartridge should be a bit longer to get up into the 1500 fps range and ease reloading.
The economy of such a cartridge to the reloader would be great.
But the problem remains that it has to survive the market.
In a recent haul of range brass, the lions share was 9mm, followed by 223.
40 and 45 had near equal representation with 38 special taking 4 th place.
Such things as the 32 or 30 super carry didn't show at all.
9mm even beat out 22 LR by a very wide margin.
It just has to place to get in the race

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it just needs more voltage

Here's Chas. Askin's cal .22CF Colt Woodsman.
Cartridge made from shortened 5.5mmVelo-Dog brass.

Askins Center Fire Woodsman

It's certainly do-able. Several ways have been used to make a reloadable
.22(RF) CF cartridge.

Tinkerers delight.

I like the general idea.
But, I think the cartridge should essentially be a 25 ACP caliber based magnum. Perhaps rimmed and rimless versions.

Yeah, I'd love to see some development of the 25ACP into something more potent. Longer case, more powder, as some have suggested something akin to the 22 magnum in 25 caliber.
Of course it would require a complete redesign of the 25ACP "mouse guns" we're all familiar with - with a grip frame big enough to accommodate the longer cartridge and magazine.
I'm envisioning something like a Baby Browning or even a Colt Vest Pocket with a grip frame about 1/8" wider (backstrap to front) to handle the longer cartridge and a barrel proofed to 35kPSI like a 9mm.
I would think that would get a 50gr pill zipping along at 1400 or 1500 FPS and make it into a mouse gun that roars!

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Send lawyers, guns & money...

See post #6 above. A small pistol primer barely fits in a .25 ACP, so a straight walled .22 centerfire round would have to use a smaller primer than currently available.

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Alan
SWCA LM 2023, SWHF 220

It looks like to make a big advancement, and another choice of 22LR Ammo, We need a Tech at like CCI to make a smaller primer, and like the CCI Stinger with 1640 FPS has a better nickel plated case, I think it will be a little higher price than some of the 22LR Rimfire, I see that some of the good stuff is running around .20-.30 Cents a round, S&W should have no problem making something like a Model 617 22LR Revolver, just call it a 617-CF, CenterFire.. Just something to think about in these cold winter months..

It would sure take a “little bitty” primer for a centerfire cartridge the size of 22LR, it would be tough to reload.

Okay, I don't know anything about reloading..

Just jesting about the “little bitty”primer

Learned a lot in this thread. Big thank you's to the experts. Love to see if any real wildcats appear, and become popular. Myself, glad I have a convertible Single-Six, and wishing I had spare cylinders for my 617 and Single-Ten to shoot 22 WMR. It's what we have that is proven and works.

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Heavily armed old man.

The lady bug is dead. The cost of setting up for production is far to much for the average person. its more expensive then setting up to swage your own copper jackets for bullets.

Though the use of a lathe would make it alot more efficient to convert.