.22 Eargesplitten Loudenboomer.

10 Bears · 08-27-2009, 04:45 PM

From the P.O. Ackley Vol.II
Wildcat Cartridges Portion of the book!
3rd printing, 1971.

.22 Eargesplitten Loudenboomer

This is a purely experimental cartridge made especially for Bob Hutton of the Technical Department of "Guns and Ammo" Magazine, in an effort to set a world's record velocity for the .22 caliber cartridge.
The cartridge is made by necking dfown the .378 Weatherbywith a sharp-cornered, 40 degree shoulder.

The following velocities were otained in a brief test before shipping the rifle to Mr. Hutton.
It is very likely that he will be able to develop loads which will produce velocities considerably in excess of this list.

It used a 50 gr. bullet.
(I will not list the powder weights, per our rules.)
Two types of powder were used, in four different charges.
Machine gun powder, one charge achieved 4160 fps.
Three charges of H570 were used and achieved, 4170, 4390 and 4600 fps.

-----------------------------------

That's all there is on the particular cartridge.
Reckon there could be more on the 'Net?

Some people have more guts than brains, developing some wildcats!
Don't imagine that barrel lasted very long either.

Pogo · 08-27-2009, 05:44 PM

Quote:

Originally Posted by 10 Bears

Don't imagine that barrel lasted very long either.

That is exactly what I was thinking as I was reading that article. When you start exceeding about 3,200 - 3,300 FPS, the barrel life starts decreasing exponentially faster.

Over 4,000 FPS, and the barrel life would be very short.

10 Bears · 08-27-2009, 08:11 PM

Quote:

Originally Posted by Pogo

That is exactly what I was thinking as I was reading that article. When you start exceeding about 3,200 - 3,300 FPS, the barrel life starts decreasing exponentially faster.

Over 4,000 FPS, and the barrel life would be very short.

Yep, that's exactly what happened to my .17 Remington.

Couple thousand rounds and the grouping was 6" or worse!
And that was at 100 yards, with a 12X scope.

Most of those rounds were in the 4000 fps neighborhood.

Pogo · 08-27-2009, 08:38 PM

In my 25-06, I don't load it to near it's maximum velocity. I typically load it at about 2,900 FPS in order to increase barrel life.

10 Bears · 08-27-2009, 08:43 PM

Good fps range, for barrel life.
My favorite .22-250 was usually around 3,000 fps.
That was the Sako.
Had the 24X Unertil target scope, real small field.
But, if you could find it, in the scope, it was hit.
Didn't use it much further than 300 yds though.
Enjoyed those 100 (and closer) shots, where you could see the "explosive" affect of the rounds on those little varmints!

Desert Rat · 01-25-2010, 08:59 AM

Years ago I read an article about necking a 20 mm cannon shell down to 22 caliber. Velocity was only marginally improved over what a 220 Swift would do. Barrel life was 2 shots.

P.O. Ackley preached all his life about cartridge efficiency. Depending on the caliber, once you pass a certain case capacity, efficiency falls off and barrel life takes a nose dive.

Somehow American shooters keep falling for the old BS that "bigger is better."

Gus · 01-25-2010, 12:44 PM

I know a 22 250 can be loaded for 4000 FPS plus however no one I know loads that hot to maintain accuracy.

10 Bears · 01-25-2010, 02:25 PM

Used to load a bunch of .22-250s.
Right at 3,000 fps, unless they were SX projos.
Over 3,000 the SX would would disentragate out the muzzle.
Anything else, 31 or 32 hundred fps.
.17 Rem. shot out the barrel after a few thousand rounds.
Most all those 25 grain bullets left at 4,000 fps.
Shock on a coyote was instantaneous, dropped dead immediatly.

.375 H&H Mag, w/270 gr. bullet @ 3,000 fps shot forever, very accurately.

I really don't know of ANY kind of barrel that will last with 4,000+fps loads.

Maybe tungston, or some other exotic metal that is just not affordable.

Desert Rat · 01-25-2010, 03:39 PM

10 Bears hits nail on head. Our problem is metallurgy, not propellants. We need actions that can stand more pressure, bullets that can hold together with accuracy and barrels that won't burn up.

And it would be nice if we could build such guns at prices we can all afford.

And while I'm wishing it would be nice if we all had wives who would want us to be the first kid on the block with such rifles.

Oh, did I mention we should all have eyesight that can spot a critter easily at 1,500 yds so we can have some use for such a "wunderrifle."

gunnysmith · 01-25-2010, 05:25 PM

It's been called "over bore".
When the weight of the projectile is exceeded by 1/2 the weight of the powder charge, barrel life decreases exponentially.

ConTender Foot · 01-28-2010, 01:58 PM

I've got a Savage in .204 Ruger that shoots the 32 Hornady V-max into .250-.5 groups and the advertised velocity is 4225.

Luckily, barrel swaps on a Savage are easy.

IRWildman · 02-02-2010, 09:02 AM

Quote:

Originally Posted by 10 Bears

Used to load a bunch of .22-250s.
Right at 3,000 fps, unless they were SX projos.
Over 3,000 the SX would would disentragate out the muzzle.
Anything else, 31 or 32 hundred fps.
.17 Rem. shot out the barrel after a few thousand rounds.
Most all those 25 grain bullets left at 4,000 fps.
Shock on a coyote was instantaneous, dropped dead immediatly.

.375 H&H Mag, w/270 gr. bullet @ 3,000 fps shot forever, very accurately.

I really don't know of ANY kind of barrel that will last with 4,000+fps loads.

Maybe tungston, or some other exotic metal that is just not affordable.

do you recall an experiment that was published many years ago about 50, in one of the monthly gun rags where some guys took a .50BMG case, necked it down to the size of the old steel phonograph needle, about 4mm and fired it in a smooth bore barrel, the velocities were up in the 7-8,000 FPS range, my biggest mistake was donating my collection of gun rags from 1958ad to 1977ad to my former gun range to sell at auction for $$$$$$ to improve the range, most were thrown in the Bar-B-Q pit the next year as no one was interested in them, then again in 1997ad i gave away the 1977ad - 1997ad collection the entire collection sold for $20.00...., never again as i quit saving them, i give them to my in-laws and sons to read when i am finished.

10 Bears · 02-02-2010, 09:23 AM

Necking the .50 BMG down to the Phonograph needle, was considered the "Ultimate Varmint Gun."

Seriously, the article was a spoof, it could not be fired out of a barrel shorter than ten feet long.

I used to neck down the 50s to take a .22 jacketed bullet and sell them as curiosities.
It is best done on a lathe, with a rollerball tool to stretch the brass.
I still have some .172 bullets, that I wanted to use but no more .50 brass.

08-27-2009, 04:45 PM	#1
10 Bears Moderator Join Date: Jul 2006 Location: E-Da-How Posts: 137,846	.22 Eargesplitten Loudenboomer. From the P.O. Ackley Vol.II Wildcat Cartridges Portion of the book! 3rd printing, 1971. .22 Eargesplitten Loudenboomer This is a purely experimental cartridge made especially for Bob Hutton of the Technical Department of "Guns and Ammo" Magazine, in an effort to set a world's record velocity for the .22 caliber cartridge. The cartridge is made by necking dfown the .378 Weatherbywith a sharp-cornered, 40 degree shoulder. The following velocities were otained in a brief test before shipping the rifle to Mr. Hutton. It is very likely that he will be able to develop loads which will produce velocities considerably in excess of this list. It used a 50 gr. bullet. (I will not list the powder weights, per our rules.) Two types of powder were used, in four different charges. Machine gun powder, one charge achieved 4160 fps. Three charges of H570 were used and achieved, 4170, 4390 and 4600 fps. ----------------------------------- That's all there is on the particular cartridge. Reckon there could be more on the 'Net? Some people have more guts than brains, developing some wildcats! Don't imagine that barrel lasted very long either.

01-25-2010, 05:25 PM	#10
gunnysmith Fear what you cannot see Join Date: Mar 2006 Posts: 6,730	It's been called "over bore". When the weight of the projectile is exceeded by 1/2 the weight of the powder charge, barrel life decreases exponentially. __________________ Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken

01-28-2010, 01:58 PM	#11
ConTender Foot Senior Member Join Date: Jan 2010 Posts: 1,234	I've got a Savage in .204 Ruger that shoots the 32 Hornady V-max into .250-.5 groups and the advertised velocity is 4225. Luckily, barrel swaps on a Savage are easy. __________________

08-27-2009, 08:38 PM	#4
Pogo Mystic Knight of the Sea Join Date: Mar 2006 Location: The Great Swamp Posts: 81,984	In my 25-06, I don't load it to near it's maximum velocity. I typically load it at about 2,900 FPS in order to increase barrel life.

08-27-2009, 08:43 PM	#5
10 Bears Moderator Join Date: Jul 2006 Location: E-Da-How Posts: 137,846	Good fps range, for barrel life. My favorite .22-250 was usually around 3,000 fps. That was the Sako. Had the 24X Unertil target scope, real small field. But, if you could find it, in the scope, it was hit. Didn't use it much further than 300 yds though. Enjoyed those 100 (and closer) shots, where you could see the "explosive" affect of the rounds on those little varmints!

01-25-2010, 08:59 AM	#6
Desert Rat Junior Woodchuck Join Date: Jan 2010 Posts: 4,592	Years ago I read an article about necking a 20 mm cannon shell down to 22 caliber. Velocity was only marginally improved over what a 220 Swift would do. Barrel life was 2 shots. P.O. Ackley preached all his life about cartridge efficiency. Depending on the caliber, once you pass a certain case capacity, efficiency falls off and barrel life takes a nose dive. Somehow American shooters keep falling for the old BS that "bigger is better."

01-25-2010, 12:44 PM	#7
Gus Junior Member Join Date: Mar 2006 Location: Arizona Posts: 66,849	I know a 22 250 can be loaded for 4000 FPS plus however no one I know loads that hot to maintain accuracy.

01-25-2010, 02:25 PM	#8
10 Bears Moderator Join Date: Jul 2006 Location: E-Da-How Posts: 137,846	Used to load a bunch of .22-250s. Right at 3,000 fps, unless they were SX projos. Over 3,000 the SX would would disentragate out the muzzle. Anything else, 31 or 32 hundred fps. .17 Rem. shot out the barrel after a few thousand rounds. Most all those 25 grain bullets left at 4,000 fps. Shock on a coyote was instantaneous, dropped dead immediatly. .375 H&H Mag, w/270 gr. bullet @ 3,000 fps shot forever, very accurately. I really don't know of ANY kind of barrel that will last with 4,000+fps loads. Maybe tungston, or some other exotic metal that is just not affordable.

01-25-2010, 03:39 PM	#9
Desert Rat Junior Woodchuck Join Date: Jan 2010 Posts: 4,592	10 Bears hits nail on head. Our problem is metallurgy, not propellants. We need actions that can stand more pressure, bullets that can hold together with accuracy and barrels that won't burn up. And it would be nice if we could build such guns at prices we can all afford. And while I'm wishing it would be nice if we all had wives who would want us to be the first kid on the block with such rifles. Oh, did I mention we should all have eyesight that can spot a critter easily at 1,500 yds so we can have some use for such a "wunderrifle."

02-02-2010, 09:23 AM	#13
10 Bears Moderator Join Date: Jul 2006 Location: E-Da-How Posts: 137,846	Necking the .50 BMG down to the Phonograph needle, was considered the "Ultimate Varmint Gun." Seriously, the article was a spoof, it could not be fired out of a barrel shorter than ten feet long. I used to neck down the 50s to take a .22 jacketed bullet and sell them as curiosities. It is best done on a lathe, with a rollerball tool to stretch the brass. I still have some .172 bullets, that I wanted to use but no more .50 brass.