If you could make a wildcat cartridge ;)

[TallPine]

How about a 9mm necked up to .45 ???

Of course you could only shoot it in double action revolvers - loading from the front of the cylinder

 

[mljdeckard]

I have a friend back home who specializes in .22 Cheetahs built on Mauser actions. it's a .243/.308 necked down to a .22. He's getting 41-4300 feet per second out of them. Turns pot-guts and prairie dogs into a fine pink mist.

 

[Nolo]

A rimless 20 gauge, then a Saiga shotgun to fit!

 

[mljdeckard]

Also, I did once inquire in here, if one can neck a .308 down to a .22, why not an -06 casing? I was informed that this has also been done. But I'm trying to get my head around the idea, if a Cheetah gets up to 4300 fps, and the gas leaves the barrel at about 5400 fps, how much further can you push it?

Of course, as an armor crewman in the armor, I fired 120mm smoothbore sabot armor piercing rounds that went 5000 fps, out of what is proportionally a very short barrel. It uses a shell with combustible cardboard case. All that comes out is the end piece, like the brass piece of a shotshell, and they cost $2500 a round.

 

[Anteater1717]

.45acp necked down to 9mm the best of both worlds, though it's probably been done.
Or, a rimless centerfire .22lr.

 

[Bartkowski]

All been done huh?

How about this, a .50 bmg trimmed to 2.00" and then necked down to .308".

 

[myrockfight]

I'm thinking taking the 30mm Brass from an A-10 Warthog necked down to .17 caliber.

I would think the main problem with something like that would be that you would only burn 1/25th of the powder before the bullet left the barrel. I would think you would need a REALLY long barrel to accomodate the slow burn of the powder out of a very small diameter barrel.

Use a faster burning powder to compensate for how fast the bullet leaves a normal length barrel and you would create a bomb.

However, I just started reloading. I don't know a whole lot about the chemistry and physics behind a great round.

 

[JesseL]

All been done huh?

How about this, a .50 bmg trimmed to 2.00" and then necked down to .308".

I saw that is an article about short magnums by Bob Forker a few years ago. He called it .3 US.

Ah, here it is:

http://www.gunsandammomag.com/techside/myth_0903/index.html

 

[macadore]

Sorry fellas, they've all been done before, each and every one of them. Even the 50BMG necked down to .22 caliber, it was called the eargesplittenloudenboomer. See P.O. Ackleys books and learn all about it.

It was a necked down 378 Weatherby. http://www.gswagner.com/bigreloading/refmaterial/ackley.html

There is a company that is working on a 7.62x25 necked down to a .22. So you can buy a CZ52, install the new barrel, and have a poor man's FN 5.7.I didn't say I would do it, but a .22 bullet in a solid copper projectile would probably be very much so armor piercing considering that the 7.62x25 already will punch through a lot.

It’s the .22 Reed Express from Reed's Ammunition & Research. I think it would be an excellent round in a 10 inch Contender. http://shop.reedsammo.com/category.sc?categoryId=50

.45acp necked down to 9mm the best of both worlds, though it's probably been done.

The 38-45 is pretty close. http://www.reloadbench.com/cartridges/w3845auto.html

 

[roscoe]

A .260 based on the 30-30, with the new Hornady tip, for lever guns. With the 30-30 case capacity, you could have bolt-gun performance in a handy lever gun (unlike the new Marlin .308).

 

[JesseL]

A .260 based on the .307 Winchester[STRIKE]30-30[/STRIKE], with the new Hornady tip, for lever guns. It would give you bolt-gun performance in a handy lever gun (unlike the new Marlin .308).

Fixed that for you.

 

[Anteater1717]

.22lr necked down to .20cal.
A higher presure 30-30, kinda like the 450 marlin.
7.62x45 necked up to 8mm or down to 6.5mm.
7.62x39 necked down to 6mm with a straightened case.
Rimless centerfire 5mm Rem.

 

[MD_Willington]

"7.62x39 necked to 6mm"

How about .220 Russian, Izhmash chambers the Saiga in 5.6x39 for Europe.

 

[zxcvbob]

.30-06 trimmed to 2" (just long enough to prevent chambering in a .30-06 or a 8mm) and then blown back out to .43 or .44 caliber. Like a much longer version of a .44AMP. Load it to about 50000 psi.

I know it would be similar to a .444 or .450 Marlin, but this would be for a Mauser action rifle.

 

[yenchisks]

i've got one but hard to explain , A 223 rem thats incased, or swallowed and neck up to 6mm and 3/16 longer.You could go from 60 gr to 100gr in this .243.plus more powder something like a 223 rem mag.

 

[PercyShelley]

I don't know if it's been done but I'd like to see a 10mm Auto necked to .17.

Been done!

http://en.wikipedia.org/wiki/17-357_RG

 

[yenchisks]

??????????

 

[Bartkowski]

Fine then, neck it down to 6.5mm. I always like 6.5mm anyway.

 

[waverace]

Something that Ive thought of and apparently has been done is a .303 british on a 308 barrel so that you get the better choice of bullets not much of a wildcat but enough to make a difference .
would give me something to do with the 4 spare DP p14 actions that I have , although one is already earmarked for 45/70 , cause I already have the right bolt for it

 

[akodo]

243 necked down to .22

been done a half-dozen times, 22-08 is a prime example (remember, 243 is a necked down 308)

30-30 necked down to .243 (probably wouldn't be too good, but for curiousity's sake I'd like to see how well it performed.

6mm/30-30 and 6mm/30-30 improved with a sharper shoulder

308 necked up to 8mm (may have been done?)

it probably has, but if so it isn't nearly as common as the other two. Thee was an 8mm-06 due to people having bring-home 8mm mausers, but no 8mm mauser ammo, so they switched to 8mm-06. The 338 federal is a 308 necked up to 338, I can't see the 8mm being different enough than the 30 or the 338 to be noteworthy, but sometimes wildcatters seem to make sometning just to have somethign different

You know, a .30-30 necked down to 6mm or 7mm could be kind of interesting

6mm/30-30 mentioned above, and I believe the 7-30 waters is a commercial 30-30 necked down

Conversely, I wonder if a .35 caliber .30-30 would work

35-30/30, old wildcat originally invented to be used in worn out 32-40 and 32 specials that were recut, but needed short cartridges (remember this is pre 308) at relatively low pressures. Matches the 35 remington ballistically

i would neck down a .45-70 to .30 say like a 150 gr

I've never heard of that, but it is following a common tradition of taking a very large parent case (be it a 404 jefferies like the 300 dakota or 300 Rem ultra mag, or the 416 rigby like the 30-378 weatherby ) so sure, why not.

So how about oddball pistol wildcats. I want .32acp necked down to .25 cal

25 NAA

I don't know if it's been done but I'd like to see a 10mm Auto necked to .17.

been done as well

Seems to me that what is left it the world of wildcatting is doing crazy stuff just to do crazy stuff, with the exception of possibly expanding the offerings of bullet diameters that are just recently being discovered/rediscovered, like the 20 and the 17...or bullet diameters that fall right between two existing calibers. I suppose there is plenty of unique wildcats you can churn out if you decide that 30 caliber is too small and 32 caliber is too big, so 31 caliber is the answer, or decide that there is a gap between 416 and 458, and that everyone who goes to africa needs a 437!

 

[tuck2]

The Handloaders Manual Of Cartridge Conversions is a 608 page book in which 11 pages list various standard and wild cat cartridges. One that is not in the book is the 25-6.8 Rem. I started reloading in 1952 and whenever a new or different size case come out it wasent long before some one made a wild cat out of it . The 222 Remington started a whole family of new cases, 221 Fireball, 223 Rem, 222 Rem Mag, 17 Rem, 17 Fireball. All have the same diameter base and small flash hole . Good luck with comming out with a wild cat that is an improvment over what has tried .

 

[bogie]

"7.62x39 necked to 6mm"

Sigh... I probably own a dozen 6PPC barrels...

Idea... A double-neck-down? A neck, and then a neck?

Of course, given that the primer's gonna start to flow about 65K...

 

[macadore]

There seems to be a lot of interest in the 30-30. What about a 30-30 with the bullet seated entirely in the case like the Nagant pistol round? This would allow the use of Spitzer bullets.

 

[redneckdan]

I would like to see some type of captive piston cartridge. Where the cartridge contains all of the expanding gasses from the propellant and allows the gun to be completely silent without using a suppressor

Already been done by the russians.




I'm working on a belt less version of the .458 2"

 

[230RN]

Has anyone screwed around with wildcats based on the 7.62 X 39 cartridge? With that short little neck, seems to me it would be good to neck it down and set the shoulder back 0.10 or 0.15 inches. Just curious about that one.

I still like my idea of a .243 or .22 based on the rimmed .30-30 case in an accurate bolt rifle for varminting and long-range medium game.