30-06 questions.

[gunguy1991]

What would the velocity be if you necked down a 30-06 to a .224 diameter and pushed the shoulder back about 4 thousands of an inch? And kpt the same case body diameter. Just thinking of a new wildcat cartridge.

 

[loadedround]

First of all it's probably been tried, and secondly it would so overbore capacity that it would completely erode your barrel in about 400 to 500 rounds. You would have to use the slowest powders avaiable, and if your bullet didn't disintegrate in flight (what barrel twist would you use), you may slightly excede the 220 Swift. Good idea, but unworkable.

 

[ranger335v]

As Loaded says, it ain't new and it ain't practical.

 

[The Bushmaster]

Why not just go out and buy a good quality .22-250

 

[NCsmitty]

As loadedround mentioned, chances are, if you can think of it, it's been done before.

Here's some info from Handloadersbench.

There is one called the 22/06 Easling and the 22/06 Short.The 06 Easling made from 25-06 brass...The Velocity listed was 3455 fps with an 89 gr bullet.
I don`t know where they found an 89 gr .224 bullet but that is pretty impressive to say the least with a bullet that heavy in .22 caliber at that speed.

NCsmitty

 

[highorder]

Cartridges of The World only shows four wildcats in .224" based on the .30-06 case.

I'm sure there are a dozen more.

If you don't have a copy of COTW, pick one up. It's an eye opener.

 

[Kernel]

What would the velocity be if you necked down a 30-06 to a .224 diameter

Based on Powley's equations, you should be able to safely move a 55 grain bullet out to 4,000 fps. Depending on barrel length, of course (and a few other variables).

 

[R.W.Dale]

The trick would be to find a propellant slow enough to make use of all that case capacity while keeping pressures within sane limits.

The expansion ratio would also be so high you'd need an exceptionally long barrel again to make use of all that capacity

 

[OYE]

Why not call it a 30/06 Acelerator.

 

[Remo-99]

Back in the 60's Ackley messed with the idea of trying to achieve 5000fps, by necking down a .378 Weatherby Magnum to .224cal.

I'd imagine the barrel was short lived, lighting up and forcing 100grs of slow burning powder through a .224 throat.
And muzzle blast would've been awsome, I guess that's why he called it ".22 Eargesplitten Loudenboomer".

 

[gunguy1991]

I wanted to use a 28" barrel with a 1 in 18" twist and maybe using h1000 powder.

 

[Kernel]

Why not call it a 30/06 Acelerator

In the barrel, the 30-06 Accelerator is a lightweight .30 caliber bullet (the .30 caliber sabot, plus the .22 caliber 55 grain bullet that rests inside the sabot). In the world of internal ballistics, it behaves different than our theoretical “.22-06” shooting a 55 grain bullet. For one thing, the sabot adds weight, about 11 grains IIRC. For another, the expansion ratios and relative capacities of the two cartridges would be significantly different.

 

[ArchAngelCD]

I'm happy with the 25-06 and see no need for a 22-06 but that's just my opinion.

 

[JimKirk]

I'd neck it down to .29 caliber... you'd be much happier with the results!!

Yeah!! Why not a .29/06... be much easier on the barrel too. If it were me I would go with the .29/06 AI to get more velocity and better case life.

Jimmy K

 

[PurpleProwess]

Back in the 60's Ackley messed with the idea of trying to achieve 5000fps, by necking down a .378 Weatherby Magnum to .224cal.

I'd imagine the barrel was short lived, lighting up and forcing 100grs of slow burning powder through a .224 throat.
And muzzle blast would've been awsome, I guess that's why he called it ".22 Eargesplitten Loudenboomer".

wow. How ironic.

I work with a guy who did something similar.

Took a magnum caliber of the same kind and necked it down to around 6MM i believe. it is a really long bullet and looks awesome like a super sized WSM but i don't know how practical it is.

 

[Hummer70]

Springfield Armory built a number of M1 Garands in 22/06 and Frankford made the ammo. I saw the rifles when I was at the Armory Museum back in 70s. The Product Engineering files are stored there that would cover the whole program and the results obtained. I picked several of them up and looked them over. My trainer told me that they ate barrels for breakfast, didn't even make it to lunch ! ! !

Something else unique you might think of is a Garand in 260 Rem. Know a guy who built one for another guy and owner won lots of matches in Florida with it but don't know his name.