Hey guys,
I know this thread is years old but I just stumbled upon it while looking for other people that have had success deer hunting with a Glock 23. I noticed a lot of speculation in the answers provided here verses actual hunting experience with the Glock 23 so I wanted to chime in with my results this past year.
I am happy to report that the Glock 23 is in fact a fine hunting weapon for white tailed deer. My wife and I have taken 3 deer this past season with my Glock 23. All of which were only shot 1 time each and none of them ran more than 70 yards (2 dropped within feet of the shot). 3 shots, 3 kills. I couldn't be happier with this gun and caliber. As for ammo, 2 of the deer were killed with 180gr hollow points by Winchester and one was killed with a simple 150gr target load. In my experience, shot placement is far more important than the ammunition choice or distance of the shot (all of my deer were taken at about 35 yards). If you can hit your mark at the given distance, it doesn't matter a whole lot what you have chambered. The inverse is also true; If you can't hit your mark, it still doesn't matter what you have chambered.
If you've had similar success with your Glock, I would love to hear about it. I hope everyone had a great season.
-Chad