My first 10mm was a G20. First mag I fired experienced a case rupture, cracked the grip, ruined the magazine. I blamed it on lack of case support in the pistol???
I now have 4 other 10mm's - two EAA Witness models and two 1911's (An RIA and a Kimber), so I did not blame the problem on the cartridge.
Mike Holmes
The very first G21 I saw was purchased new by a cop friend in 1991 or 1992. Several of is were shooting Deltas or S&Ws and this new rubber gun was a big deal, so we met him at the PD range to see it run and get a turn on it. KaBoomed on the first shot, blew the right side of the grip out and scuffed his hand up pretty good. It was 17 years before I accepted issue of a Glock duty gun.
Glock eventually improved their chamber support and I may try a 20SF just for S&G.
