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Old September 6, 2006, 12:04 AM   #1
Jason607
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.450 SMC / .45 Super for Glock 21?

I am wondering what I have to do to my Glock 21 to make it fire the super/smc load. I know I need a different recoil spring, which one do I need and where can I get one?

Any help will be apreciated.
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Old September 6, 2006, 12:09 AM   #2
918v
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Unless you want to blow yourself up, stop right now. The 21 has a grossly oversized and unsupported chamber that is barely adequate for the 45 ACP. Add to that a capability of firing while out of battery, and a 30000PSI Super, and you will loose some of your fingers.
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Old September 6, 2006, 11:10 AM   #3
Hard Ball
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Don't do it! The Glock 21 has enough problems without going to higher pressure ammunition.
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Old September 6, 2006, 11:52 AM   #4
Te Anau
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One of the reasons I sold my Glock 21,(besides its being super ugly & anti-ergonomic) was the never ending concern over whether or not it would kaboom on the next round.That was with .45acp
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Old September 6, 2006, 02:26 PM   #5
Ausserordeutlich
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All you need is the wisdom to know from whom to take advice and a 22#-24# recoil spring. Going with a compensated KKM barrel would make for a really nice setup.
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Old September 6, 2006, 02:53 PM   #6
Jason607
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Wow, so glocks are unreliable POS's? Any links to these glocks falling apart? I have two, I need to know about this, if it exists.
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Old September 6, 2006, 04:23 PM   #7
KurtC
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There are some frightening pics on this site.
http://www.jrguns.com/kaboom/
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Old September 6, 2006, 04:53 PM   #8
Jason607
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That is one biased site. I am no firearms expert, and from some of the pics, it doesn't tell alot, but some of those appear to be what happens when a bullet is lodged in the barrell and you fire another one behind it. I have seen many failed firearms in many makes. I will agree though, that putting on the hotter load is like spraying nitrous. I am getting that Glocks are like Mustangs, although a best seller, people swear they suck, and some swear by them, while others hate them. I think the popularity turns some against them. Haha, I own both!!!

I am not arguing the point, maby a Glock isn't built to handle the 45super load. It was built for a 45acp, and maby I should keep it at that.
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Old September 6, 2006, 07:04 PM   #9
Ausserordeutlich
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I'll offer the benefit of my actual experience, rather than hypothetical pontificating about G21s. I've fired both .45 Supers and .450 SMCs through Glock 21s, with no problems. I did use the heaviest recoil spring that I could find. Tens of thousands of rounds later (but only a few hundred .45 Supers, etc.) and my trusty G21s are still spot-on.

I'd prefer an aftermarket barrel with a comp, eg., KKM, for shooting really hot ammo through Glocks.
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Old September 6, 2006, 07:39 PM   #10
SamC
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I ran 450 SMC in a 1911 for a while and still have some 450 SMC ammo laying around. There's a tag that came with the ammo that lists what springs are needed to convert a handgun to fire the 450. The Glock 21 has a factory spring rate of 17#. HD spring rates listed for the 450 SMC conversion are: 19,20,22 or 24. This is right from Triton ammo. They list Wolff Gunsprings as a manufacturer.
http://www.gunsprings.com
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Old September 6, 2006, 08:02 PM   #11
Deaf Smith
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The .45 Super is a no-go if the case has large pistol primers (primer flow will flow back into the firing pin hole.) .45 SMC is a better choice as it uses small rifle primers.

As for Glocks, yea I'd get a supported barrel before I'd do that trick (or just get the 10mm version and be done with it.)

Now in my 1911s, .450 SMC is the way to go! Just get a heavier recoil spring. While it's still not a bear gun, in FMJ form, it wouldn't be so bad.
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