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Old 02-16-2013, 16:36   #2
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Join Date: Nov 2012
Posts: 65
You should be fine running it in your G20. Usually the "unsupported chambers" specification is meant for 10mm barrels without a ramp, like the Colt Delta Elite 1911 style pistol. Your G20, especially if it's of newer production, has plenty of case support for any factory loading.

The only 10mm ammo that I know of that was too hot to run in a stock G20 barrel was Swamp Fox's special "aftermarket barrel only" loads.
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