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Glock 20 or 21 for Limited?


CJ1

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I've been shooting Production with a G17 and a G34. Now I'd like to start shooting Limited, partly because hardly anyone shoots Production around my area for some reason.

Anyway, I also own a G20 in 10mm and a G21 in .45 Auto. I am considering using one, or both, for Limited so I can take advantage of major scoring. I am leaning towards using the G21 over the G20 for several reasons. With Arredondo mag extensions the .45 would be 17+1 capacity while the 10mm would hold 20+1. I don't really think the lesser capacity of the .45 would be too big of a disadvantage, especially since I shoot this pistol so well. In fact, I shoot the G21 better than my 9mm Glocks, not sure why. Any suggestions? Anything else I should know/consider?

Thanks!

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Your hand is probably a better natural fit on the G20/21 frame than the smaller Glock frame, which might explain your improved shooting. 17+1 seems like enough rounds to me before you'd wind up empty. I think even the stock 13 rd mags in the 21 would probably get you through most stages just fine. Of course, wanting to shoot limited IS a good excuse to go buy something in a .40 if you want to do that...

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Thanks for the replies.

My G20 is the newer of the two, I bought it originally for use as a "woods" gun. I've had the G21 for several years now. I've hardly even shot the G20, maybe 200 rounds, since 10mm seems scarce and expensive in my area. The reasons that I'm leaning towards using my G21 are, I already have 8 mags for it, a usable holster/mag pouches, and I already reload for .45. All I'd have to do is add some mag extensions and go shoot. The G20 I only have the 2 mags that came with it, and I am not yet set up to reload 10mm or .40 if I go with a conversion barrel. Basically, it would cost more to get the G20 ready. I do like the idea of the conversion to .40 though since factory ammo and brass for that are much more available and cost less than 10mm. I don't know why I didn't think of that.

So, it appears the answer is to shoot my G21 until I can get the G20 set up. Thanks for helping me with my thinking out loud on here. Now I feel kind of silly for even posting this.

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Thanks for the replies.

My G20 is the newer of the two, I bought it originally for use as a "woods" gun. I've had the G21 for several years now. I've hardly even shot the G20, maybe 200 rounds, since 10mm seems scarce and expensive in my area. The reasons that I'm leaning towards using my G21 are, I already have 8 mags for it, a usable holster/mag pouches, and I already reload for .45. All I'd have to do is add some mag extensions and go shoot. The G20 I only have the 2 mags that came with it, and I am not yet set up to reload 10mm or .40 if I go with a conversion barrel. Basically, it would cost more to get the G20 ready. I do like the idea of the conversion to .40 though since factory ammo and brass for that are much more available and cost less than 10mm. I don't know why I didn't think of that.

So, it appears the answer is to shoot my G21 until I can get the G20 set up. Thanks for helping me with my thinking out loud on here. Now I feel kind of silly for even posting this.

With a little work, I was getting 18 rounds in he G-21 mags. Using arredondo bases, ISMI PO=45 mag springs and shaving the legs on the old style followers.

Good luck!

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If "brass availability/cost" wasn't a consideration, I'd definitely shoot the G-20. As others have said, there are usually plenty of places on a course to execute a reload, but if it isn't necessary, you'll ALWAYS move faster if you just have to run, rather than reload AND run....

You could download the 10mm to a workable power level easily, even using the 200 grain bullet if you prefer the "light but lopey" recoil of the heavier bullets. You just have to be the ultimate "brass rat", gleaning through the grass to find those expensive suckers!

The 10mm uses Large primers, so you're already set there. The only caveat to using 10mm is that you should be very careful and not in a hurry when you unload the gun. That large primer makes a bigger target area for the ejector, meaning that it's easier to detonate a round against the ejector.

As far as conversion barrels go, isn't there a prohibition against doing that, as Glock has never made a large-frame gun in .40 S&W? I remember this being a hot topic of debate a few years ago. Perhaps it is now settled??

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The smaller capacity of the 21 could be a disadvantage in some stages,but if you shoot better with it and you're good at reloads then go for it.

I'd tend to agree. 17+1 rounds isn't that bad, most people only get 19+1 with a G35. If you shoot it well, that's a lot more important than a couple extra rounds.

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I would get a conversion barrel for you Glock 20 and shoot .40SW. The frame and trigger should be identical to the G21 since they're both large frame guns, and you'll get the increased capacity(20+1 is pretty easy) plus free brass if you're somewhere where you can pick it up at matches. You also get decreased cost of ammo over all.

That said, if you like your G21 and have all the stuff you need already, might as well shoot it. If you're going to buy a bunch of parts for one of them and make it a competition gun, I'd use the G20 for sure.

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As far as conversion barrels go, isn't there a prohibition against doing that, as Glock has never made a large-frame gun in .40 S&W? I remember this being a hot topic of debate a few years ago. Perhaps it is now settled??

It's legal to use the conversion barrel in limited, but not production.

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Shoot the G21, you're about ready as it is..... upgrade as you want/need to and have a blast. I shoot my G21 well also as it fits me better than the small frame guns.

Edited by CDPMatt
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I started with a G21 in limited. I put sights a .25 trigger job, 15# wolff recoil spring, magwell and mag extensions. 17 rounds in the mag

I did not feel I was at a disadvantage. I also reload. 172 pf in the G21 feels soft.

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You will be fine with the 21 45acp I shoot it for everything prp-am,steel,& ipsc limited. Capacity shoudnt be an issue as you think the stage you will find the right spot to change mags.Unless your like me when the timer goes off the plan goes to hell. Attending 2 matches per month I have yet to see a 20 in 10mm or 40conv. You could try a 21T 5'' upper I think it is legal since LW has produced at least 500 units. Whatever you do be CAREFULL ejecting those large pistol primed 10mm.They make me nervous!

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Why does ejecting the large pistol primed 10mm make people nervous? What's so different about that versus large pistol primed .45 auto?

I've never thought about it before, but now you guys are making me nervous!

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Why does ejecting the large pistol primed 10mm make people nervous? What's so different about that versus large pistol primed .45 auto?

I've never thought about it before, but now you guys are making me nervous!

Look at a .45 case next to a 10mm -- see how much case there is between the edge of the primer and the edge of the case on the .45? You're less likely, if you have a case tilt or slip slightly in the extractor, to have the primer hit the ejector on the .45...

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I would get a conversion barrel for the G20 and run that. The extra expense for the barrel, dies, etc. will be more than made up for in the long run with savings on smaller bullets, .45 vs. .40. Also .40 brass can be obtained for free or almost free. Then there's the weight issue, if you fly to matches 450 rounds of .40 is lighter than 450 rounds .45. Some ticket agents can be asses when it comes to weight limits in checked luggage.

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Why does ejecting the large pistol primed 10mm make people nervous? What's so different about that versus large pistol primed .45 auto?

I've never thought about it before, but now you guys are making me nervous!

Look at a .45 case next to a 10mm -- see how much case there is between the edge of the primer and the edge of the case on the .45? You're less likely, if you have a case tilt or slip slightly in the extractor, to have the primer hit the ejector on the .45...

Exactly. Since a 10mm is basically a .40 loaded longer, the 10mm is .05 inches narrower, with the same primer face. The ejector is closer to the center of the gun on the 10mm, making it closer to the round and closer to being a make shift firing pin.

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  • 2 weeks later...

Shoot the one you like the best

I have a g20 with a 40 barrel and can get 21 in arradondo extended mags (I trimmed the follower legs) but if you are set up to load 45 shoot it till you find a reason to change.

21, nice! Where did you trim and how much did you remove? Do you have any pics of the follower by any chance?

Thanks

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Shoot the G21, you're about ready as it is..... upgrade as you want/need to and have a blast. I shoot my G21 well also as it fits me better than the small frame guns.

The Glock model 21 fits my hand better as well. Plus I have a large inventory of .45 ACP ammunition because of my 1911 pistols. My model 21 has a 3.5 lb. trigger disconnect, Wolf trigger return spring, an aftermarket trigger bar, and a Dawson adjustable rear sight with fiber optic front blade.

Also have a Ky-Tac holster and magazine pouches...which proved to be a little better overall than my Blade-Tech products.

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My limited gun is a Glock 20 with a 40 S&W conversion barrel. Chuck a Carver Custom magwell on there, and you should be ready to rock in limited.

The CR Speed versa pouches also work pretty well with no insert to hold the large frame mags.

If you like light recoil and striker springs, it will run just about any loads. If you don't, like me, you will need heavier loads, which is ok, because it is a very soft recoiling gun.

Edited by dagger10k
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