Although I can still get 9mm ammo locally for about $9 per box of 50, obviously one can shoot A LOT more .22 lr for the same money. In your opinion, is there any benefit to using one of the .22 conversion kits in a carry gun (a Glock 19 in my case). My home is on a few acres just outside of the city where I can (and do) shoot safely at my own personal range. I fire a few rounds of centerfire each week, but will pop off several .22 rounds most every day that I'm home. Unfortunately, none of the rimfire guns are in a platform similar to any of my carry guns. Thanks, in advance, for your reply.