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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.
 

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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.
 

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what bullet and grain are you looking for?

for the 10, Blue Dot, AA No. 9, 800X, and Longshot are your friend...

edit, never mind i didnt read it carefully enough, you are looking for 0.40SW...
 

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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.
 

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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.
 

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Discussion Starter #8
Ok thanks everybody I figured that was the case but figures I would ask.

Cemo very descriptive thanks! LOL
 

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I dont think the OP was asking to reload 10 MM data for his 40. It's the other way around. But still, dont do any loading other than whats listed in the manuals.
 
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