I am hoping to get an answer from someone who has experience with this specific question - I have a G22 with its stock .40 bbl. and aftermarket 357SIG bbl. and 9mm conversion bbl. When shooting 9mms, it functions just fine 98-99% of the time. In my quest for perfection, I was wondering about something... Hypothetically, if I replace the stock extractor with a G17 extractor while shooting 9mms, what will happen if I choose to leave the G17 extractor in place and attempt to shoot .40 (yes, w/ the .40 bbl. )? Will the claw fail to engage the .40's case rim? I don't know, but I would guess (I haven't looked) that the 9mm extractor has a more pronounced claw. Is it feasible to modify this G17 extractor by reducing the claw size and/or angle a tad to create a compromise extractor? Any comments or ideas to contribute?