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Dan-O · January 18, 2013, 06:30 PM

I believe Storm Lake is still producing a true "conversion" from 21 to 20. A straight up G20 barrel will work in a G21 though.

BVAC publishes a velocity of 1100 fps. Everything that I've seen clocks it at more like 1000 fps.

Underwood Ammo is the real deal. Of course they're out of stock like everyone else right now though. The only other way to get the most out of 10mm is to make your own.

January 18, 2013, 06:30 PM	#5
Dan-O Senior Member Join Date: August 3, 2011 Location: Northern Colorado Posts: 969	I believe Storm Lake is still producing a true "conversion" from 21 to 20. A straight up G20 barrel will work in a G21 though. BVAC publishes a velocity of 1100 fps. Everything that I've seen clocks it at more like 1000 fps. Underwood Ammo is the real deal. Of course they're out of stock like everyone else right now though. The only other way to get the most out of 10mm is to make your own.