considering a Glock 21

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I say that you are a smart man and should get it because the glock 21 is a great gun. I am a huge glock fan, alway's have been, alway's will be and i think the glock in my opinion is a better choice then the xd. It has proven itself time and time again.
 
Sorry, Powder_Burn, but your reference to "not reloading for Glocks" was in the context of the .40 which is a much higher pressure cartridge than the old .45.

Many tens of thousands of 1911s with "unsupported" chambers have been shooting factory and reload rounds by the millions. I am not aware of a diasterous syndrome of exploding 1911s.

The Glock 21 chamber is no less supported than any GI or milspec 1911. It is as safe to use for relaoding as any standard 1911. Reload jacketed ammo to your heart and wallet's content.

Have you personally seen any 1911 or G21 blow up due to SAAMI pressure loads of either facotry or reload (assuming a reasonable number of reloads and watching as always for signs of case wear)? Can yuou cite one professional article that makes such as claim?

Unsupported chambers are a NON ISSUE for the G21. It is irrelevant. Do not confuse the low pressure .45 with the much highr pressure .40.

Even the .40 can be safe to reloadin Glocks. Just reduce the pressure. The Laser-Cast reloading manual specifically states reduced loads for the .40 just for "unsupported chamber" reloads.

In summary:

1) Unsupported chambers: only reload lower pressure rounds such as the .45 or reduced pressure .40. Or, buy an aftermarket barrel with a more fully supported chamber.

2) Polygonal rifling: only shoot jacketed bullets, either factory or handloads. Or, buy an aftermarket barrel with some form of regular rifling (hammer forged, broach cut, buttoned, etc.).
 
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