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40 cal magazine

Hi,

Welcome to the forum.

I have a 40 caliber XD gun, I just purchased a 9mm Mod 3, my question is can I use the 40 caliber magazine in the 9mm pistol?

Is this a temporary measure? XD9 mags are not that expensive, especially when somebody has them "on sale". I'd recommend using the proper factory mags, especially for defensive purposes.

Example: $22 at gunmagwarehouse.com for XD9, 16 round.



Thank you for your indulgence,

BassCliff
 
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I would think the lips would be too wide to hold 9 mm rounds. The .40 mags can also be used with .357 Sig ammunition, but I don't think it will hold the 9mm. I say this without a .40 to try this with.
 
I would think the lips would be too wide to hold 9 mm rounds. The .40 mags can also be used with .357 Sig ammunition, but I don't think it will hold the 9mm. I say this without a .40 to try this with.
They aren’t.

In fact, quite often on a lot of magazines, if you measure the lips, 9mm and .40 are identical. Sometimes the follower is different, though.

During the 94AWB, a “work around” the 10rd mag cap was to use a .40 magazine in your 9mm; you could usually fit 12-14 rounds of 9 in a ten round .40 mag.

Of course, you had to test to make sure it was reliable, but…it usually was.

I’ve done it with USP’s. It works.
 
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