The Firearms Forum banner
1 - 9 of 9 Posts

· Registered
Joined
·
30 Posts
Discussion Starter · #1 ·
I shoot a 40 cal Springfield XD can I use the reloading data for a 10mm?

The only differance I see is the OAL for the 10mm is a little longer. If they are interchangable why differentiate between the two?

The reason I am asking is that I can find load data for the 10mm in the bullet gr I want for my 40 cal.
 

· Registered
Joined
·
3,128 Posts
don't interchange, the inner case wall is different between the two and the primers are different sizes.

There's plenty of 10mm info out there, check out the freebies from Hodgon and others or grab one of the caliber specific books off of Midway or LGS wherever.
 

· Banned
Joined
·
2,751 Posts
I shoot a 40 cal Springfield XD can I use the reloading data for a 10mm?

The only differance I see is the OAL for the 10mm is a little longer. If they are interchangable why differentiate between the two?

The reason I am asking is that I can find load data for the 10mm in the bullet gr I want for my 40 cal.
NO!!
Absolutely NOT. They are two completely different cartridges and load data is NOT interchangeable. The only thing they share is the bullet size and diameter. Using data for the 10MM in the 40 would be akin to using 300Win Mag data in a 308 because the share the same bullet and bullet diameter.

The 40 S&W has a case capacity of 19gr H20, the 10MM has a case capacity of 24gr H20. This is important and here is an example why.

QL Calculations.

40 S&W, 180gr Sierra JHP, Ramshot Silhouette, 6.2gr Max
Code:
 +00.0   86     6.20   1032     426   33189psi   4289     97.6    0.464  ! Near Maximum !
10MM, 180gr Sierra JHP, Ramshot Silhouette, 8.4gr Max

Code:
+00.0   77     8.40   1216     591   35545psi   4635    100.0    0.501  ! Near Maximum !
This is what would happen if you loaded 10mm data(8.4gr) in the 40.

Code:
 +00.0  116     8.40   1323     700   [B]75462psi[/B]   5310    100.0    0.328  !DANGEROUS LOAD-DO NOT USE!
That's 75K psi in you hands, gunna hurt to say the least.
 

· Registered
Joined
·
2,006 Posts
I don't think that is a very wise thing to do. The 10mm has a longer case and some of the starting loads for 10mm are above the max load .40 S&W. The sig 357 and the 9mm both use the same bullet, but the pressure limits for the two are very different. SAAMI does not publish 10mm pressures (that I can find), but they may also be vastly different.

You would be better off to find the load data for the .40 S&W load you want.
 
1 - 9 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top