glock 27 357 sig conversion

This is a discussion on glock 27 357 sig conversion within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; was wondering if anyones had much success with this kinda change?...

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Thread: glock 27 357 sig conversion

  1. #1
    Member Array Leadtag's Avatar
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    glock 27 357 sig conversion

    was wondering if anyones had much success with this kinda change?

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    All you need is a Glock .357 SIG drop in barrel, you can use the same magazines!

    Lone Wolff sells Glock drop in barrels or you can just get a genuine Glock.
    ALWAYS carry! - NEVER tell!

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    VIP Member Array AZ Husker's Avatar
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    Yep, no "conversion" barrel needed. Just the stock G33 barrel.
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    Member Array Leadtag's Avatar
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    I was just curious as to how reliable the g 27 would be with the drop in 357 sig barrel,I already purchased mine.

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    Quote Originally Posted by Leadtag View Post
    I was just curious as to how reliable the g 27 would be with the drop in 357 sig barrel,I already purchased mine.
    Just as reliable as a Glock 33!

    I had to have something a little different!
    ALWAYS carry! - NEVER tell!

    "A superior Operator is best defined as someone who uses his superior
    judgement to keep himself out of situations that would require a display of his
    superior skills."

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    New Member Array hillclimber's Avatar
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    Installed an "older" stock G33 barrel in my G27...I am now a 357 sig fan..can hold a tighter group when emptying the mag as fast as she will run...

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    Distinguished Member Array orangevol's Avatar
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    I just bought a G 27 last week and was discussing this conversion with the gun shop owner. He said I would also need a .357 Sig magazine because the .357 in the .40 mag tends to stovepipe.

    Anyone confirm / deny this info?

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    VIP Member Array ExactlyMyPoint's Avatar
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    I was thinking of doing that, too, but dang, where do you get the ammo? Just can't find it anywhere. And even if I could, I fear it would be just too expensive to shoot.
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    VIP Member Array AZ Husker's Avatar
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    Many folks use their .40 mags with no difficulty. In fact, many will tell you the .357 Sig is a necked down .40 S&W. Actually, it's a necked down 10mm. I use the proper mags for whichever caliber I'm shooting.

    Plenty of ammo out there, especially online. My favorite is Double Tap. The Gold Dots aren't that much more expensive than any other premium ammo, yet toss a 125gr Gold Dot out of the barrel at 1450fps and a 147gr GD at 1250. Very impressive loads! I've been finding JHP's at several WalMarts.
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    Member Array BadgerMan's Avatar
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    I can't say for certain how well the .40 mag will work with the .357s in your Glock, but I know that for my M&P FS .357 that the magazines are marked .40 and .357 so I think you should be alright.

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    Distinguished Member Array tinkerinWstuff's Avatar
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    Hrm, this is interesting. I'm beginning to get jelous of you guys with swap out barrels on your glocks. I might need to get something new to spice up my G27
    "Run for your life from the man who tells you that money is evil. That sentence is the leper's bell of an approaching looter. So long as men live together on earth and need means to deal with one another-their only substitute, if they abandon money, is the muzzle of a gun."

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    Distinguished Member Array orangevol's Avatar
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    Many folks use their .40 mags with no difficulty. In fact, many will tell you the .357 Sig is a necked down .40 S&W. Actually, it's a necked down 10mm.
    AZ Husker

    True, both derive from the 10mm. A .40 S&W could be considered a 10mm short. I have not comparred the .40 mag to a .357 Sig mag. I would think .357's would feed OK from the .40 mag since the larger diameter portion of both shells are the same and is what contacts the lips of the magazine.

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    Senior Member Array usmc3169's Avatar
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    .357 and .40 have an almost identical case length - but they are different. The .357 SIG is not a necked down 10mm - unless they are cutting about a quarter inch off the top of the case.

    .357 SIG will fit in pretty much any .40 mag.
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    Member Array Ionizedsky's Avatar
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    To answer the question about the reliability of feeding and weather to use the .357sig or .40s&w mags. Most will probably tell you that have done the conversion that both mags will work. Most manufactures if you look, you will see that the feed lips on the magazine are slightly shorter on the .357sig than the .40s&w mags. With the necked down casing of the .357sig and the longer feed lips you should still be okay, BUT.... For ultimate reliability always use what the manufacture designed. They don't spend all the $$$$ on R&D for nothing... Good Choice of round, welcome to the ballistic nirvana :)
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    Member Array Leadtag's Avatar
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    Quote Originally Posted by Ionizedsky View Post
    To answer the question about the reliability of feeding and weather to use the .357sig or .40s&w mags. Most will probably tell you that have done the conversion that both mags will work. Most manufactures if you look, you will see that the feed lips on the magazine are slightly shorter on the .357sig than the .40s&w mags. With the necked down casing of the .357sig and the longer feed lips you should still be okay, BUT.... For ultimate reliability always use what the manufacture designed. They don't spend all the $$$$ on R&D for nothing... Good Choice of round, welcome to the ballistic nirvana :)
    So are you saying to use 357 sig mags in my g27 or just not bother with the drop in and stick with the 357 sig glock models?Thanks

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