222 Low-Drag

[Rocketvapor]

Actually a hydrostatic test (brass unsupported), 2 or 3(?) firings as fired vs annealed.

Upper part of balloon is indicative of hardness, lower part shows bulge due to wall thickness.

 

[1911nut]

Rocket, what does your test tell us? I’m thinkin about where cases typically fail.

 

[Rocketvapor]

Rocket, what does your test tell us? I’m thinkin about where cases typically fail.

No, the failure (body split) wouldn't happen in a chamber.
It's the balloon SHAPE that shows the even stress distribution with a soft/annealed case.
Uneven stress might cause a failure at the annular line you see below the neck.

 

[1911nut]

I wondering if the ballooning below the shoulder might relate to the dreaded click? Thinner brass work hardening. Dead brass as Tony Boyer calls it.

https://bulletcentral.com/my-brass-is-clicking-what-should-i-do/

I can’t shoot, still 2 1/2’ of snow so got lot of wondering time

 

[deadduck357]

Any new developments on the 222 LD?

Or is OP missing the fingers to update us after his over-pressure round finally caught up to him?

Have done some more testing. Ran into some dismal accuracy results with the 88s that I need to ask y'all about.

Also have been testing the AR-15. No accuracy tests with it, just function testing with heavies. Confirming gas port size.

No, haven't blown anything yet. Just been very busy.

 

[deadduck357]

I think those charts are part art, part science. Some of the powders are so close together in burn rate that lot to lot variations or slightly different testing protocols will rearrange the list differently when you're looking at adjacent and closely related powders.

Possibly. From my understanding that some of these powders are the same just offered and labels for different companies. ??

 

[deadduck357]

Dead duck. Noun INFORMAL a person or thing that is defunct or has no chance of success. "they knew their plans were a dead duck"
Sorry I couldn't resist looking up what dead duck meant. No offense or disrespect intended.
Fascinating thread.

Just like duck hunting and the 357 Mag (also SIG) cartridge(s).

 

[deadduck357]

As LONG as you don't go faster than my LONG loaded 22 Nolser with 88ELDs, I'm OK
View attachment 1096048

I'm also working on a .224 wildcat with more case capacity. Having a little trouble getting someone to make me a reamer though.
The 224 Balloon.

View attachment 1096053

No worries, I'm restricted to 2.260 COL.

DAYUM! Lol yep imagine that would be a difficult reamer to make a chamber.

 

[deadduck357]

29 Days without a new post from the OP. I think we can say this wildcat is officially dead.

I've just been real busy. Work, trying to kill pigs before vegetation and ticks get too thick, and a little time with the misses has left no time to check this thread, sorry. Do have a question maybe y'all can help with, when I can get a few mins I will try and ask.

 

[deadduck357]

I would guess that the OP is busy learning how to respond with his new eye patch and prostetic fingers. Give it a little time, that's a lot to learn. Lol

Still got both eyes and all digits... for now.

 

[mac86951]

I think those charts are part art, part science. Some of the powders are so close together in burn rate that lot to lot variations or slightly different testing protocols will rearrange the list differently when you're looking at adjacent and closely related powders.

And extremely subjective to testing environments too. My thought is it's a relative burn rate chart; so doubtful the reburn all the powders again at chart update.
Good for ballpark checks.

I'd go up and down on the chart near the burn rate area you're checking and select a few to try. Some are cut differently and may allow a Volume fill change. (Ball vs. stick vs. varget vs. cordite...)

-mac

 

[IowaGeologist]

I'm hoping the 222 Low Drag release is right around the corner. Any updates?

 

[IowaGeologist]

Any hope for a 2021 Shot Show release for this physics defying round?

 

[S11033]

Is this project still alive? I found the idea very compelling.