The 22UM

[The Fish Box]

Uhoh

 

[cal30_sniper]

22/6mmAI or 22/6.5x55imp would be legit

I have dies for the 22-6mm AI. My only hesitancy in that cartridge is the seemingly unnecessarily long neck. A 22-257AI seems to be a bit better case geometry with more powder capacity that could still be loaded with the 257AI bushing dies that Redding makes.

Either of them seem to make a compelling step up from 22 Creedmoor that take better advantage of the Tikka action length. I have a stack of Lapua 8x57 and Norma 7x57 that I’m currently resisting creating one of these from.

Another option is to run a 22 Creedmoor reamer to 7x57 depth, which ends up working out perfectly for the case head diameter of the Mauser case.

The 22x55 Swede Improved has also been done, it was called the 224 Vais and reportedly an excellent performer. That, or a 22-284 would be the easy button with cheap available brass. I’d give the nod to x284 for no fireforming.

 

[The Fish Box]

@Formidilosus whats the next step for this?

 

[Formidilosus]

@Formidilosus whats the next step for this?

Maybe a setback and rechamber to 22UM 30°. Or maybe a longer, less sharp shouldered cartridge.

 

[Billogna]

22UM/Weatherby perhaps?? lol

 

[Gstew1930]

22-06AI sounds bad ass to me

 

[The Fish Box]

Here are the case capacity numbers of cartridges around the same size. Seems like the 22-284 might be the best option for a fast 22 in a thin cartridge or the 06. It’s surprising that the few 22prc things I have seen don’t do great.

 

[longrangelead]

22-06AI sounds bad ass to me

make up your mind or get one of everything!?

 

[Gstew1930]

make up your mind or get one of everything!?

I just need to get rich. I want alot of shit

 

[Brontosaurus]

22UM/Weatherby perhaps?? lol

Don't be weird

 

[Formidilosus]

22UM/Weatherby perhaps?? lol

I absolutely am doing a 224 Weatherby- it’s the neatest cartridge. I will use whatever cartridge it takes to get the MV with the bullets I want I am also not enamored with short and fat as some are, and am not worried if I need to use a LA case.

 

[Brontosaurus]

I absolutely am doing a 224 Weatherby- it’s the neatest cartridge. I will use whatever cartridge it takes to get the MV with the bullets I want I am also not enamored with short and fat as some are, and am not worried if I need to use a LA case.

The 06 case is a better choice due to quality brass availability.

 

[khuber84]

I absolutely am doing a 224 Weatherby- it’s the neatest cartridge. I will use whatever cartridge it takes to get the MV with the bullets I want I am also not enamored with short and fat as some are, and am not worried if I need to use a LA case.

The 06 case is a better choice due to quality brass availability.

All the data I'm finding on the 224 wby is indicating a case capacity of 38gr? Which lands it in the range of all the BR variants. A 22bra will be roughly 37.5gr capacity and have an equally as long neck as the 224wby mag. Same usable case capacity.

224 wby is kind of an oddball, case head diameter is 0.430 so assuming it runs a ppc bolt face? I had assumed it was just a 22 cal version of the 240 wby, however it's a fair bit less overbore than the rest the weatherby family.

 

[Formidilosus]

All the data I'm finding on the 224 wby is indicating a case capacity of 38gr? Which lands it in the range of all the BR variants. A 22bra will be roughly 37.5gr capacity and have an equally as long neck as the 224wby mag. Same usable case capacity.

Correct. The 224 Weatherby is a different use case than the big one.

 

[Billogna]

I absolutely am doing a 224 Weatherby- it’s the neatest cartridge. I will use whatever cartridge it takes to get the MV with the bullets I want I am also not enamored with short and fat as some are, and am not worried if I need to use a LA case.

Sounds interesting!! .257 Weatherby parent case maybe?? I think it has something like 84 grains water capacity. Should be enough to get you the velo you're after.

 

[RockAndSage]

Sounds interesting!! .257 Weatherby parent case maybe?? I think it has something like 84 grains water capacity. Should be enough to get you the velo you're after.

There's got to be a dozen Fudd wildcats of .257 Weatherby in .22 cal, it's been around way too long for there not to be.

Separate but related, for these modern, really long heavy-for-cal bullets, do the long necks of the Weatherby cartridges offer any advantages?

 

[Billogna]

There's got to be a dozen Fudd wildcats of .257 Weatherby in .22 cal, it's been around way too long for there not to be.

Separate but related, for these modern, really long heavy-for-cal bullets, do the long necks of the Weatherby cartridges offer any advantages?

Yeah... the Fudd's were chasing lazer straight 4000+ fps for the most part tho with light bullets. Might be time to renew interest with all the new heavier bullet offerings nowadays tho!! I'm sure that longer case neck would serve pretty nice for that! Might play hell finding a match style/killing bullet that'll handle that kind of velo/spin rate...

edit to add:

Of course a 22/257 Weatherby might be SO disgustingly overbore the juice won't be worth the squeeze over a 224 Weatherby or 22 creed.

 

[RockAndSage]

Yeah... the Fudd's were chasing lazer straight 4000+ fps for the most part tho with light bullets. Might be time to renew interest with all the new heavier bullet offerings nowadays tho!! I'm sure that longer case neck would serve pretty nice for that! Might play hell finding a match style/killing bullet that'll handle that kind of velo/spin rate...

edit to add:

Of course a 22/257 Weatherby might be SO disgustingly overbore the juice won't be worth the squeeze over a 224 Weatherby or 22 creed.

Couldn't you just go with a slower twist-rate, to keep the RPM down in something going that fast?

 

[Billogna]

Couldn't you just go with a slower twist-rate, to keep the RPM down in something going that fast?

That's possible i suppose. I'm far from a ballistics/wildcat expert. Depending on where Form wants to end up velocity wise. There's also the option to neck down a 26 Nosler. Or possibly rework a 22 Cheetah to handle heavy pills. All sorts of routes to go here.

 

[turbo406]

Just starting into this thread but posting this question so I don't forget. Have you guys looked into nose ringing a 77 smk for something like this? Was curious if it would handle rpm better? Been really eyeing the tool for 105s in an arc