22 Eargesplitten Loudenboomer

[farmer44]

Anyone familiar with this caliber?

 

[358WCF]

This one? From Ackley's book via Google.

 

[farmer44]

Very interesting no doubt thanks for the reply.

 

[jpjulian]

Saw a .50BMG necked to .22 cal. once in a gun shop. No load data............

 

[Geronimo Jim]

I want one!

 

[JLT]

Saw a .50BMG necked to .22 cal. once in a gun shop. No load data............

Fill the case with Kingsford Match Light. Use a blasting cap for a primer.

 

[Mike TackleBerry]

At that point i'd just run a 22 Creedmoor and be happy lol, Barrel life on that thing is probably 200 rounds.

 

[long40shot]

The thought of the case forming alone gives me anxiety.

 

[Bronsin]

At that point i'd just run a 22 Creedmoor and be happy lol, Barrel life on that thing is probably 200 rounds.

The report I read said it was only 3 rounds

 

[itchyTF]

The report I read said it was only 3 rounds

Hard to do any testing at that rate.

 

[Fuj]

Back in the late 70's I sold off my 350 Rem Mag brass to a fella doing
a .22 cat. Had to use a bullet made by Barnes, since it was the only one
that did not blow up beyond 4000 fps. I wonder where that went to ??
he was in his 60's when he built it.

 

[ShtrRdy]

Saw a .50BMG necked to .22 cal. once in a gun shop. No load data............

I've got one of those. A friend gave it too me. We had been helping clean up the estate of someone.

 

[357Mag]

Anyone familiar with this caliber?

Farmer44 -

Howdy !

I think Hutton was ultimately trying to see at what point significant increases in powder charge did not result in useful velocity gains.

Ballistician Homer Powley said in his “Powley Computer “ usersp’s manual,
that rifle “ expansion ratio “ is usually no less than 5, while some anti-aircraft guns had been made with expansion ratios as low as 4. In .224” cal and given a 28” barrel length,
a notional powder charge of around 72gr would yield a rifle expansion ratio of 4.
The “ Eargesplittin’ Loudenboomer “ data listed shows charges 30 -36gr PAST what it takes to get an in-efficient expansion ratio of 4.

Hodgdon’s load data shows that for a notional .224” cal 50 grain bullet, there are already existing cartridges that can put 4,100fps on a 50gr .224” cal together bullet…. allowed enough barrel length. A .223WSSM could do it, given a 26” barrel. The .22 Cheetah MkII is another example. They list at least one load for a 24” .220 Swift that gave 4,100fps. And there are other known cartridges that can generate that velocity level, again…. given enough barrel length.

My point:
As novel or promising putting such a large charge behind a small calibre bullet might seem, in-actuality… it is a false promise. You’d be burning that extra powder for little else than eroding the barrel @ an alarming rate.


With regards,
357Mag

 

[alf]

My version:

 

[farmer44]

Interesting thanks for the input

 

[JoeMcNeill]

If anyone has access to the 1958 Gun Digest, (mine is in storage), you can see a picture of a 50 BMG necked down to .17 caliber, claimed to fire a 25-grain bullet @ 6125 fps. I don't remember a charge weight or powder but I thought it interesting!

JDM

 

[Fire Dog]

As far as the name goes, Eargespliting Loudenboomer can be applied to any cartridge 7mm up when fired in a rifle fitted with a muzzle brake…!

 

[Loudenboomer]

Loudenboomer.... I'm up to speed on that!

 

[cmillard]

Maybe that was when April fools jokes started.....with that article

 

[snert]

Reminds me of Fredo's 220 Redline. For those not familiar, there remains a great thread on it here on AS, and follow-up article on Coyotestuff.com. It was pushing a 70 grain in the 4100 area and I watched it roll a chuck sideways three revolutions. Gosh I miss Fredo!