9mm in 40 s&w magazines

[Collint2005]

What handguns can you put a 40s&w magazine in to hold more than 10 rounds of 9mm. Just any gun that comes in both calibres?

 

[Stevebot-7]

Not necessarily, they would need to use the same magazine body, and the feed lips would have to be compatable.
For example, with the Walther P99 .40 magazines, the feed lips are about 1/64" too wide to hold 9mm cartridges. A few will stay in there but after that the spring pressure causes them all to pop back out.

 

[Collint2005]

Are there any other calibres this works for? Like maybe 45 and 40?

 

[cancer]

Beretta 92/96 mags are good to go. Sig mags are iffy. Glock mags are no go.

 

[Chuckbuster]

I tried a .40cal magazine in my M&P 9. The gun became a 2 shooter, then a club.

 

[Arloashean]

Beretta 92/96 mags are good to go. Sig mags are iffy. Glock mags are no go.

Definitely works on my G17 - Glock .40 mags will take 12 or 13 9mm rounds (a bugger to load) and an aftermarket mag will take 11 or 12. Fires reliably with those.

 

[Trinimon]

Definitely works on my G17 - Glock .40 mags will take 12 or 13 9mm rounds (a bugger to load) and an aftermarket mag will take 11 or 12. Fires reliably with those.

+1 on the Beretta 96/92 swap. With my two Glock 22 mags, I can load up 9mm rnds but it's just being held in place by the feed lips by a hair and if I drop a full mag, I've had it eject most of the rounds from it so I guess it's a hit and miss.

 

[Drucifer]

Anyone know for Tanfoglio/CZ mags?

Ive seen Glocks and a HK USP work fine.

 

[prevost12]

I was curious about M&P mags. Has anyone successfully shot 9mm out of a .40 mag in that platform?

 

[Chuckbuster]

^Not me. It was nothing but a recipe for malfunction in my M&P9.

 

[WestIslandRifle]

Sprindfield xd 9 works in 40 mags