40 S&W in 9mm?

[Weekend Gunslingers]

Hi all

I am just wondering (since I can not find any HK P30 9mm mags anywhere) if the 40 S&W feeds reliably enough to use in a 9mm for competition purposes?

Anyone have any experience with it?

thanks

 

[Porschemann]

I use M&P40 mags in my M&P9 and they work just fine. FYI, a 10 round 40 mag will take 13 rounds of 9mm.

 

[Weekend Gunslingers]

Thanks

 

[Porschemann]

some 40 mags are too open at the front end and the rounds will want to stove-pipe in the mag from the spring pressure. If that's the case, a slight tweak to the front lip of the mag to put just a slight hold on your cartridge may be in order. I have no idea if the HK mags are like that, but found that with some S&W mags.

 

[LuckyOnes]

some 40 mags are too open at the front end and the rounds will want to stove-pipe in the mag from the spring pressure. If that's the case, a slight tweak to the front lip of the mag to put just a slight hold on your cartridge may be in order. I have no idea if the HK mags are like that, but found that with some S&W mags.

"tweaking" a magazine to function with a caliber not intended for use in it....hmmm...
At the very least you shouldn't be throwing that out into the world of Internet. Just sayin.

 

[Cocked&Locked]

I have a P7 which is an HK, it's in 9 but i have a 40 mag for it that works 98%. Don't know if you'd have the same result with the P 30....as stated it's easy to tweak.

 

[Porschemann]

"tweaking" a magazine to function with a caliber not intended for use in it....hmmm...
At the very least you shouldn't be throwing that out into the world of Internet. Just sayin.

Oh boy, better not type that into google then! Whole forums about it... works with some mags, doesn't work with others...

smith-wessonforum.com/smith-wesson-m-p-pistols/240052-9mm-round-doesnt-work-40-cal-mag.html

 

[krausb]

Oh boy, better not type that into google then! Whole forums about it... works with some mags, doesn't work with others...

smith-wessonforum.com/smith-wesson-m-p-pistols/240052-9mm-round-doesnt-work-40-cal-mag.html

I think you are missing his point, or at the very least are unaware of it. Altering the .40 magazine to make it function with a caliber other than the one it was designed to hold makes the magazine a prohibited device under Canadian law. If the magazine holds 13 rounds of 9mm and does not require any modification, then you are good to go. Once the mag is "tweaked" to function with 9mm then it is a prohibited device. Hope this helps clear things up.

 

[LuckyOnes]

I think you are missing his point, or at the very least are unaware of it. Altering the .40 magazine to make it function with a caliber other than the one it was designed to hold makes the magazine a prohibited device under Canadian law. If the magazine holds 13 rounds of 9mm and does not require any modification, then you are good to go. Once the mag is "tweaked" to function with 9mm then it is a prohibited device. Hope this helps clear things up.

This ^^^^^

Oh boy, better not type that into google then! Whole forums about it... works with some mags, doesn't work with others...

smith-wessonforum.com/smith-wesson-m-p-pistols/240052-9mm-round-doesnt-work-40-cal-mag.html

I'm all over using .40 mags with my 9mm big guy... Google doesn't make it legit, and I just know that there are some gov't workers out there who will poop concrete if you mentioned that you modified a magazine for function. That's all.