I have also switched to the 24rd Glock mag for my G19 reload... I was carrying a pair of 17's.
Regarding the 24rd mag: When fully loaded (24rds) it will rattle like a bitch, totally unacceptable for CCW. Downloading to 23 locked all the rounds tight but that bugged my OCD, then I discovered I could easily stuff in an extra round for 25 total and it tightened up again.