10mm pressure compared to .40S$W

[jetrefueller]

Hi Guys another of my dumb questions but I have to learn. Can anyone tell me the difference in the pressure of a 10mm and the .40S&W. In other words
would it be possible to use 10mm in a Beretta .40S&W or is the 10mm to high a pressure?

 

[mmattockx]

10mm Auto is substantially longer and will not chamber in a .40S&W.

10mm Auto:
COL - 1.260"
Case Length - 0.992"

.40S&W:
COL - 1.135"
Case Length - 0.850"

Mark

 

[tjhaile]

SAAMI maximum pressure for the 10mm is 37,500 psi compared with 35,000 psi for the .40 S&W. The pressure isn't much higher, but 10mm requires large-framed guns (much like .45 ACP) to accommodate its increased length. The higher recoil impulse would also accelerate wear on guns that aren't designed to handle it.

 

[NAA]

10mm Auto is substantially longer and will not chamber in a .40S&W.

10mm Auto:
COL - 1.260"
Case Length - 0.992"

.40S&W:
COL - 1.135"
Case Length - 0.850"

Mark

This is true.

In reverse, it is often possible to shoot .40 S&W in a pistol chambered for 10mm. However, this is NOT a recommended pratice. Here's a link to a good article that explains why:

http://www.thegunzone.com/10v40.html

NAA.

 

[SandRoad]

As above, don't confuse peak pressure with velocity. There is basically no difference in the working pressures between the 10mm and 40 S&W.

However since the 10mm is longer, it can be stuffed with much more, slower burning powder.

 

[jetrefueller]

Thanks guys that clears it up.

 

[Camp Cook]

This is true.

In reverse, it is often possible to shoot .40 S&W in a pistol chambered for 10mm. However, this is NOT a recommended pratice. Here's a link to a good article that explains why:

http://www.thegunzone.com/10v40.html

NAA.

I used to shoot a few 40's in my 10mm's I have now purchased 40S&W barrels and swap them when I want to shoot cheaper more available 40S&W.

 

[PeterPan]

10mm is a very unique caliber and has it follow up, but for me .40SW is a way to go.
It is cheaper and plentiful and makes the same paper hole like 10mm

 

[NAA]

I used to shoot a few 40's in my 10mm's I have now purchased 40S&W barrels and swap them when I want to shoot cheaper more available 40S&W.

I will admit to shooting a few .40's in a Colt Delta and a S&W 1066 I owned previously will no apparent ill effect. Then I discovered that Gunzone article and abandoned the process.

I did have Gunnar @ Armco fit a .40 S&W to one of my current Colt Deltas, though....

Best of both worlds as there is plenty of free .40 S&W brass in these parts left behind at the local ranges after the cops practice.

NAA.