Help making an "experimental" style cartridge -odd looking

[rayraywolf]

I know PO Ackley created the .22 Eargesplitten Loudenboomer in the 1960s just to see how fast he could push a bullet. If I remember correctly, the parent case was a 375 H&H necked down to 224. I think these types of "cartridges" are really neat. Not really to shoot, but just to have an inert cartridge of something that looks really odd.

Does anyone know of a way to make this (or similarly odd) cartridge with typical reloading dies? My father-in-law is looking into purchasing a 50 BMG and I would love to neck down a 50 BMG to 224 to give him. Like a gag gift or a curiosity piece.

[Hickory]

It is said you need to clean it every 2.4 round for top accuracy and barrel life is less than 30 rounds.
It didn't catch on for some reason.

[rayraywolf]

I'm sure these cartridges were about the most efficient way to burn out a barrel. But I would still like to make an inert cartridge or two just to put on my shelf.

[rockrat]

I remember decades ago, someone had a pic of a 50 bmg necked down to 17 cal. Right off hand I cannot think of a quick and easy way to neck one down to 22 cal. You would have to probably have made a series of bushings made to progressively neck it down, and a die to hold the bushings, like competition dies. Would be easy once you have the bushings/die made, but wouldn't be cheap.

[Skipper]

Just for info, it was the .378 Weatherby necked down. Looks like a ton of work to even make a sample.

189464

[country gent]

I rolled a 20mm case neck down to 22 cal once in the lathe. Just for grins and giggles. Used a knurling tool with smooth rollers and a pin in the tail stock to help support it. Was a lot of work as I had to roll the neck down then set up and blend in the shoulder. Making the bushings would have been easier

[jbutts6785]

You could always try the .2240 Triple Necked Terror

https://www.ingunowners.com/forums/ammunition-reloading/412503-2240-tnt-triple-neck-terror.html

[Teddy (punchie)]

Does anyone know of a way to make this (or similarly odd) cartridge with typical reloading dies? My father-in-law is looking into purchasing a 50 BMG and I would love to neck down a 50 BMG to 224 to give him. Like a gag gift or a curiosity piece.

I going to dig out the other Ackley book I have one found but not the other. I see if he explains the neck sizing down. LOL love it !!