http://www.sportsmansguide.com/net/cb/cb.aspx?a=458584

Saw this in a Sportsman's Guide sale ad that arrived yesterday. It's a steel sleeve shaped like a .45LC shell case that lets you fire .22LR out of your pistol. It would be like firing a 3/4 inch barrel through a pipe.

Is this dangerous or just weird?

They also sell the sleeves to convert .308, .303 or 30.06 to .32ACP.

Probley accuarte as I can spit!

I think it's a pretty cool idea. Obviously, we're not talking target accuracy or hitting a squirres's head at 50 feet. But for CAS practice or just plinking at cans from around 15 feet, I bet it would be cheap fun!

The rifle to 32 ACP conversiopn units used to be common accessories prior to WWII per an article in one of my older Gun Digests if I recall the source correctly.

Apparently reasonable plinking accuracy out to 50 yards or so was available, depending on the rifle. In a rifle I would expect the muzzle blast would be minimal which could be an advantage for suburban or semi rural varmint removal.

Opens a lot of possibilities, doesn't it?

On the rimfire in the .45 Colt, I take it the bullet in no way touches the rifling?

Well, why don't they make a .32 or even a 9mm conversion for a .45 Colt/.44 Magnum then?

Numrich Gun Parts Corp. sells them too:

NUMRICH

A lot of these were made to use pistol cal. in break-open shotguns. I've got them up to 357 (32-38sp-357-45acp) and in lengths of 2-6 inches. The bullet doesn't touch the shotgun bore. I have a set for a 30-06 that allows 30cal carbine and 32acp use in 30-06 made as "Alex adapters" - they made them for numerous rifle cal. and they all use the rifle barrel by adapting the chamber to smaller cart.

Dang ole hot dog down a hallway.