I have heard of the 22-243 doing 4200fps and the 22-284 doing 4500fps.
Do you know of any other wildcats that are faster.

Thanks
TRG.

The .22-.460 Eargasplittinloudnboomer (sp???) was shooting 50 grain bullets at close to 5,000 fps.

Lee Martin
www.singleactions.com

depend what bullet weight
if you stay in very light bullet as 30 or 35 gr and IF your bullets is strong enought to dont burst you can reach 5000 fps in 22/243 or in 22/284 with very slow pitch barrel ( 1 in 15 )

problem is if you want need to reach very hight velocity with bulley heavier than 55 gr
you get very hight pressure and a lot of carbon fouling because you need to use very slow powder

usual capacity is 22/243 , 22/243 Midd , 22/244 REM , 22/244 REM AI , 224 Clark , 22/284 over 22/284 you are over bore and you just burn more powder for fun

good shooting

DAN TEC

The fastest commercially loaded or factory produced cartridge ever is I believe the old german 5.6x57 (a 7x57 necked down to .22).

Regards

How are the cases formed ?

22 - 460 Eargasplittinloudnboomer
could you tell me the dimention

quote:

Originally posted by tera:
How are the cases formed ?

22 - 460 Eargasplittinloudnboomer
could you tell me the dimention

The case was formed from the .378 Weatherby, necked down to 22cal, 40 degree shoulder.

I was thinking a fella could take apart a 50 BMG SLAP round and replace the .308 tungsten penetrator with a Remington Accelerator sabot carrying a .224 45 grain X bullet. Might be fast...

quote:

Originally posted by tera:
How are the cases formed ?

22 - 460 Eargasplittinloudnboomer
could you tell me the dimention

I think there was a 50 bmg necked down to 22..
70gr at 6500fps with LIQUID propellant...
just over 5200 with h1000

probably 3100 with ground kingsford charcoal

jeffe

quote:

Originally posted by dantec:
depend what bullet weight if you stay in very light bullet as 30 or 35 gr and IF your bullets is strong enought to dont burst you can reach 5000 fps in 22/243 or in 22/284 with very slow pitch barrel ( 1 in 15 )

I know that jacketed lead bullets can/will come apart and sometimes "vaporize" (although never witnessed it) at extreme velocities. What about solids in either copper or bronze?

I thought I read in one of the magazines that modern smokeless powder can only expand at around 5000fps. so no matter how much powder and how light of bullet it can still only go 5000fps (or somewhere around that speed).

quote:

Originally posted by trg:
I have heard of the 22-243 doing 4200fps and the 22-284 doing 4500fps.<br />Do you know of any other wildcats that are faster.<br /><br />Thanks<br />TRG.

TRG,

How fast depends on lots of factors, bullet weight, gun powder expansion ratio, temp, etc. The military did some experimenting with EMP guns and were able to get 30-35,000fps but thats high tech stuff and off the radar.

Corbin

quote:

Originally posted by corbin shell:

quote:

Originally posted by trg:
I have heard of the 22-243 doing 4200fps and the 22-284 doing 4500fps.<br />Do you know of any other wildcats that are faster.<br /><br />Thanks<br />TRG.

TRG,

How fast depends on lots of factors, bullet weight, gun powder expansion ratio, temp, etc. The military did some experimenting with EMP guns and were able to get 30-35,000fps but thats high tech stuff and off the radar.

Corbin

WOW... that would catch Einstien's attention!!! Damn near time travel!!!

For the record: I built a couple of 22-378 Ackley Improved-style rifle several years ago. 60gr Nosler solidbase bullets took the torque and velocity and made nice 3/8" 5-shot groups at 100yds. About 60 per barrel. 5000+fps. 26" barrel. 80gr JLK's (sierra makes a blatant copy) nearly 4600fps.
Still have the reamers and dies if anyone wants to put a real barnburner together.

regards,

Rich

What do you mean 60 per barrel? Hope it doesn't mean shots.

At those speeds, I'm sure it's only ~60 shots before the barrel is done for, even if you kept the bbl iced down while shooting.

In another life I shot a .220 Swift and a .22/.243 Middlestet. I could vaporize light Speer hollow points, and even those that held together showed melted lead cores spraying on the target paper.

It was more fun to go up in bullet weight, down in velocity and shoot at long range.

I have waited for the sabot technology to mature. It works OK in smoothbore tank guns at very high velocity, with fin stabilization. Remington's Accelerator loads used special powders.

You can buy the sabots, and I had hoped that a flexible usage would develop: for example shooting 6 mm bullets from my .308 or things like that.

jim

I'm working on a 22/106 recoiless, that should have velocities near lightspeed, but right at the moment the backblast is giving trouble

I shoot 55 gr hornadys 4500 fps with a 22/308 sabot and 65 grs of AA 2230. Pressure is 42K psi and bbl life is conservatively estimated to exceed 10,000 rounds.

Sabot, what 30 caliber are you using? Who is making the sabots? I have wanted to try some in my .308 for some time now. Thanks.

quote:

Originally posted by KennethI:
Sabot, what 30 caliber are you using? Who is making the sabots? I have wanted to try some in my .308 for some time now. Thanks.

Go to:

http://www.jdcomponents.com/

and you will find the folks in Orem Utah. Get the special seater for sabots, as seating with your own die will give inconsistent results.

quote:

probably 3100 with ground kingsford charcoal

nyuk-nyuk-nyuk!

Not to correct people,but in ackley book the 22-284 with a 15gr bullet was cronograped at 6585fps. I would call that the fastest,wouldn,t you. van

van,
Do you know what kind of propellant was used? I don't think smokeless powder could reach that kind of velocity.

quote:

Originally posted by KennethI:
van,
Do you know what kind of propellant was used? I don't think smokeless powder could reach that kind of velocity.

50grs 4227. 30" bbl. Avtron Chrongraph

Thanks craigster. I'll have to look into this, very interesting.

It's not a .22...really not even a bullet, but for velocity NASA has really got a leg up.

There used to be some hot-stick jet-jockey Air Force test pilots at Edwards that wore patches on their sleeves saying things like "Mach 2", and a few with "Mach 3" patches. They ate in the same mess hall some of the NASA flight guys also frequented on their occasional way back to Florida. So one day, with a big bunch of smiles, up show the NASA guys with patches they'd had made, reading something like "Mach 18" (or was it "Mach 22"?). I don't remember what "escape" velocity from the earth's atmosphere is, but I know it makes our fastest bullets look like disabled turtles. And people ride on those things!!!

quote:

Originally posted by GBF:
The fastest commercially loaded or factory produced cartridge ever is I believe the old german 5.6x57 (a 7x57 necked down to .22).<br /><br />Regards

there was also a Fast twist version of this for shooting heavy for caliber .224 bullets called the 224Clark.

AllanD

Allen: the 224 Vais is faster then the 224 Clark.


80 grain VLD at 3800fps

I've made 5150fps using 50gr BT and 108grns AR2208 in the 300RUM. Obviously using accelerators. A bit disappointed I haven't made 1 mile per sec yet. But I should be able to with AR2206H. Just need the time.

Tera,

I made mine from 378Wby brass, and the use of a set of Neil Jones (CPS) dies. He makes a necksizing die with interchangeable bushings. You just run all of them thru the .400" bushing, then the .375" bushing then the rest, till you get to the end. Load the case with a fireforming load, like 100gr of AA3100 and blow out the neck/shoulder area.
I am slowly working my wqay up to building another one. It would be easier since 30-378Wby brass is now available.

Rich

Chas Newton had a .22 Newton cartridge...same as the German 5.6x57, a 7x57 case necked to .228".
It was not designed for ultimate velocity, but as a medium size (deer, antelope) big game rifle shooting .228 bullets of 90 gr. in a 1 in 8 inch twist barrel at 3100 fps. It overtakes the .22-250 at long range due to its great sectional density, & bullet weight. I think with lighter bullets, like the 50 gr. ones it would surpass the .220 Swift.
It was a factory loaded cartridge at one time, but Newton gave it up, and went to the .256 Newton as a hunting cartridge. I have a .22 Newton, but can't find the heavy 85-90 gr. bullets of .228". The bore is .228" with a 1 in 8 inch twist. Its an interesting cartridge & if I could find some .228" heavy bullets, I could find its potential. I think the German 5.6x57 may have been a copy of the .22 Newton as I think Newton came out with it first.
Best Regards, Tom