10mm Rowland?

[pinne65]

Could we bump the 10mm up the same way as the 45acp by using a stronger spring and a heavy muzzle break? And maybe see a 200gr bullet @ 1700 -1800 fps

The caveat I see is that the 10mm is already up there in pressure compared to the original 45 cap.

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[the4thshake]

You answered your own question.

The 10mm is already way up there in pressure.

1300 fps is about as fast your gonna get a 200 grain bullet without running into pressure issues.

 

[edslhead]

I believe the 10mm magnum has already come and gone. I think you can still get brass for em.
Pretty rare guns but they would be the way to go.



Here is some data from a guy loading 10mm magnum. He's not getting anything near what your looking for from a regular 10mm.

BULLET: HORNADY 200 XTP

LOAD MV GROUP CASE EXPANSION*

16.0 GR. AA#9 1379 1" .425"

17.0 GR. AA#9 1452 2" ES=20 .425"

18.0 GR. AA#9 1477 2 5/8" .4255"

20.0 GR. H110 1507 1" .4245"

21.0 GR. H110 1597 3 1/4" ES=26 .425"

20.0 GR. WW296 1561 3" .425"

21.0 GR. WW296 1621 2" .426"

16.0 GR. #2400 1421 3 1/8" .425"

17.0 GR. #2400 1503 2 1/4" ES=25 .4255"

18.0 GR. #2400 1569 5/8" .4255"

12.0 GR. BLUE DOT 1391 2 1/4" .425"

13.0 GR. BLUE DOT 1461 2 1/8" ES=28 .4255"

14.0 GR. BLUE DOT 1529 3" .426"

DIAMETER OF UNFIRED BRASS ABOVE WEB IS .42

 

[Certaindeaf]

Remember the old 9mm magnum,, in the Wildey I believe.
What an odd bird. Probably more reliable than a .357 mag out of an autoloader though.

 

[edslhead]

Remember the old 9mm magnum,, in the Wildey I believe.
What an odd bird. Probably more reliable than a .357 mag out of an autoloader though.

I must be too young to remember that one

Edit: I guess I'm not. Never herd of it before though.

9mm Winchester Magnum - Wikipedia, the free encyclopedia

 

[Certaindeaf]

It was pretty lame.. it and the .45 magnum never really caught on.

 

[HappyRoman]

I guess I would ask Y? you might answer, because..

Really a standard 10mm 180 gr load seems nice to me.

 

[misterarman]

How about 40 Super?

 

[The Courier]

Thicken the brass walls, fully support the chamber, and then put that cartrige in a Mauser broom handle style platform (so length of cartridge/grip is not an issue). And you now have my dream pistol.

 

[mjbskwim]

Thicken the brass walls, fully support the chamber, and then put that cartrige in a Mauser broom handle style platform (so length of cartridge/grip is not an issue). And you now have my dream pistol.

You can make it work with the right tooling
Anything is possible but maybe not in a traditional style 1911 frame. Maybe in a Desert Eagle configuration?
454 casull frame revolver?
Someone somewhere has done it. But there needs be a reason.
Why not just use a 44mag or a 454? More energy from those

 

[pinne65]

You answered your own question.

The 10mm is already way up there in pressure.

1300 fps is about as fast your gonna get a 200 grain bullet without running into pressure issues.

Yea - It's mostly wishful thinking and curiosity from my side. Expecting it to be confirmed but hoping for it to be disproved

I believe the 10mm magnum has already come and gone. I think you can still get brass for em.
Pretty rare guns but they would be the way to go.



Here is some data from a guy loading 10mm magnum. He's not getting anything near what your looking for from a regular 10mm.

BULLET: HORNADY 200 XTP

LOAD MV GROUP CASE EXPANSION*

16.0 GR. AA#9 1379 1" .425"

17.0 GR. AA#9 1452 2" ES=20 .425"

18.0 GR. AA#9 1477 2 5/8" .4255"

20.0 GR. H110 1507 1" .4245"

21.0 GR. H110 1597 3 1/4" ES=26 .425"

20.0 GR. WW296 1561 3" .425"

21.0 GR. WW296 1621 2" .426"

16.0 GR. #2400 1421 3 1/8" .425"

17.0 GR. #2400 1503 2 1/4" ES=25 .4255"

18.0 GR. #2400 1569 5/8" .4255"

12.0 GR. BLUE DOT 1391 2 1/4" .425"

13.0 GR. BLUE DOT 1461 2 1/8" ES=28 .4255"

14.0 GR. BLUE DOT 1529 3" .426"

DIAMETER OF UNFIRED BRASS ABOVE WEB IS .42

VERY INTERESTING - you don't happen to know from kind of gun these were fired?

You can make it work with the right tooling
Anything is possible but maybe not in a traditional style 1911 frame. Maybe in a Desert Eagle configuration?
454 casull frame revolver?
Someone somewhere has done it. But there needs be a reason.
Why not just use a 44mag or a 454? More energy from those

I was thinking of something fired from std 10mm autos modified in the same fashion as 45acps are for the 460 Rowland.

 

[Koda]

I was thinking of something fired from std 10mm autos modified in the same fashion as 45acps are for the 460 Rowland.

I think it technically could be done....

The problem that I see with this idea is that when its over you'll end up with.... nothing different than the 460 Rowland but with a slightly smaller bullet. Essentially, its already been done with the Rowland.

but not that it matters, even Rowland made a 9mm version called the 960 Rowland. Why? Because he could.

Maybe what someone should do is neck a 10mm down to 9mm... and sell drop in conversion barrels.

 

[edslhead]

"VERY INTERESTING - you don't happen to know from kind of gun these were fired?"

AMT Auto-mag IV is one and some revolvers are out there. All I know is what I got from looking for them online. Ive never even seen one in person. These are around $2500 at auction if you can find one.



AMT AUTO MAG IV IN 10 MM MAGNUM WITH NO RESERVE

 

[Mark W.]

Just pull the trigger twice and be done with it

 

[The Courier]

Another idea a co-worker and I were talking about is taking an M1 carbine and refurbish it to fire a 10mm mag...Now who wouldn't want a handy semi auto carbine in that chambering? Kind of a modern day guide gun.

 

[mjbskwim]

The 357 from a 16" barrel shoots like a 44 mag from a 6" barrel and the 44 does the same compared to a 454
So a 10mm should be quite the gun the OP wants in a carbine configuration
I would love to have a 10mm AR with a 16" barrel
***With g20 30rd glock mags***
Yeah I know they don't exist

 

[Certaindeaf]

The 357 from a 16" barrel shoots like a 44 mag from a 6" barrel and the 44 does the same compared to a 454
So a 10mm should be quite the gun the OP wants in a carbine configuration
I would love to have a 10mm AR with a 16" barrel
***With g20 30rd glock mags***
Yeah I know they don't exist

The HK UMP in 10mm exists.

 

[Benchrest]

Other than hardcast / coated, what conventional bullet would hold up at those velocities?

And having tried 43 different powders in the 10mm, I'm not sure what one would pack in the case to achieve such a speed.

Drop a threaded barrel in a G20, put on a 30deg muzzle brake, and install a 24# spring. Shot 200gr @ 1,250 all day long, comfortably. Be happy

 

[DeanfromOregon]

Maybe what someone should do is neck a 10mm down to 9mm... and sell drop in conversion barrels.

They could call it ".357 Sig"!

 

[Benchrest]

Or 9x25, aka 9mm Dillon