It doesn't kick bad. I've wondered why people worry about 10mm recoil and I think in part it's because people hype up the 10mm's power (nuking small countries with it, shooting the 10mm causing the earths axis to shift, all the power of a 20mm Vulcan in a smaller package, etc). It's a service caliber cartridge, it's not going to snap wrists. Also the G20 is the heaviest Glock model. I would say it recoils a little more than a G21, but I've shot my .40's that kick harder (sometimes) than the 10mm.