I also shoot the Glock 20 in 10mm Auto, so recoil is not a factor. My wife shoots the Glock 27 in .40S&W. (When firing, it comes up on her quite a bit.) I was taken back that, as explained to me, the .40 S&W is not a "classic" chambering and the 9mm is. My history of the 9mm goes back to WW1...