My statement was from my glock 30. It will not run swc ,I would have assumed the feed ramp was the same on a 21 but ??
Apparently not. Although, I've used several 30SF and one 30S that all ran fine on my SWC loads (200gr cast SWC & 4.0gr-4.3gr Bullseye depending what I'm loading for). If I ran into the extraction issue described above though, first things I'd try are making sure the extractor doesn't have gunk built up in it, and bumping up the load slightly to increase slide speed. Don't know if that would help in yours or not? I rarely clean my Glocks though and haven't had problems so the extractor gunk seems unlikely to be an issue.
For sure though, the G21 is the easiest of the lot to run with any bullet you want, including full wadcutters if the load is tuned right.
