wildcat cartridge idea

[colt.45]

I think I have a pretty good wildcat cartridge idea that could be fun to do. Ok, it starts out as a .223 remington case. Then i cut it off at the shoulder and resise it to .357. I call it ".357 thompson" or something like that. Im thinking the velocity would be around 2300 with 110 grain pills out of an 18" barrel. it could be a fun little project for a mini-14.

what do you think? i dont really know what im talking about and it could be nearly impossible to legally do this, but i think it could be a plausible cartridge.

 

[R.W.Dale]

Sorry but you've already been beaten to the punch

http://64.70.221.101/cartridges/w338223s.html

 

[Cosmoline]

I've always wanted to neck a .223 up to .45 and load it with 300 grainers.

 

[colt.45]

sorry cosmoline. the maximum you could neck up a .223 would be 9mm.

 

[Car Knocker]

I've always wanted to neck a .223 up to .45 and load it with 300 grainers.

sorry cosmoline. the maximum you could neck up a .223 would be 9mm.

In a standard chamber configuration, no. But, technically, it could be done - most easily through the use of a chamber insert to support the base of the case - headspace on the case mouth. A chambered breechblock could probably be made to work as well. Hmmm.

 

[asknight]

Colt.45, what would that cartridge provide or do that the .30 carbine won't?

 

[Gewehr98]

Well I'll be darned.

I think Colt.45 just discovered the .357 Remington Maximum cartridge, sans rim.

 

[Cosmoline]

I was actually joking, but apparently it IS possible so it just shows what I know

 

[Tony Williams]

I've thought before that necking the 5.56x45 out to 9mm would make an interesting alternative military cartridge. With a pointed, steel-cored bullet it would have good penetration and stopping power out to medium range, and for longer ranges (or for use against top-class body armour) use saboted tungsten-cored ammo. And for SF use it would be suitable for heavy-bullet subsonic loadings.

Tony Williams: Military gun and ammunition website and discussion forum

 

[jerkface11]

Catridges of the world says that if you make .223 straight walled you get a .338. Besides even if you could make it .357 IT'S BEEN DONE. It's called .351 WSL. We have reached the point where EVERY wildcat idea has already been done. All you can hope to do is to come up with a wierd way to duplicate an existing cartridge.

 

[Tony Williams]

Catridges of the world says that if you make .223 straight walled you get a .338. Besides even if you could make it .357 IT'S BEEN DONE. It's called .351 WSL. We have reached the point where EVERY wildcat idea has already been done. All you can hope to do is to come up with a wierd way to duplicate an existing cartridge.

There are 9mm pistol rounds based on the 5.56mm case - its outside diameter is 9.5mm. And the calibre of a 9mm isn't .357, it's .355.

I know there have been similar rounds in the past, and I know about the .351 SL - I have a round in my collection - but that was semi-rimmed and made to entirely different standards. Modern ammo can be loaded to much higher pressures than the old SL rifles could take.

Tony Williams: Military gun and ammunition website and discussion forum

 

[Otherguy Overby]

.223 brass has already been shortened and made into a pistol round. Winchester makes it. It's called 9x23. 125 grain bullets at 1450 fps.

I just wish they'd make more of it. I've a pistol in that caliber, it's a great round.

 

[Jim Watson]

And there is/was the 9mm Winchester (Wildey) Magnum, 9x29, same caselength as .357 Magnum.

I would think the best application of a ".223 Straight" would be with relatively heavy bullets, with considerable similarity to .351. All the strong modern action type and high chamber pressure business means is that you can shoot a bit heavier bullet a bit faster, but the concept is the same.

If you want speed, just shoot .223s, not light 9mms.

 

[dfaugh]

Actually

I was thinking of something similar, but on a 7.62x39 case. Wouldn't shorten it at all, just neck it up to 9mm...Not sure there's much advantage here though, as you're now talking about bullets of similar weight to the original.

 

[Jim Watson]

The Rooshins did that a while back.
9x39 with 247 and 260 grain bullets at 920 fps for subsonic sniping, a la Whisper.