[Grizzz]

Sooo your saying i can get a g20 / 10mm conv. to 40s&w & shoot it in my g21 slide ?

Originally Posted by vaquero aleman

I'll up your ante,

I have a G21, in which I placed a factory G20 6" barrel, and fired some 40 S&W. I use a Wolff guide rod with #20 spring. I shot Underwood 165gr 40 for a few rounds and then tried some Underwood 135gr 40. I threw away the first three rounds, of the 135gr, because they did not ignite. The pin had obviously punched the primer but did not ignite it. The 165gr fired without incident but the 135gr would not fire and I can only assume it was because the extractor could not hold the case against the breech solidly enough. Therefore, I intend to get a 10 to 40 conversion barrel to use in my G21. And I did perform the "KKM" mod to the extractor.

And, I must add, that there is no "why" only "just because".