I carry a Glock 23 every day, all day, and have done so for several years now. Very comfortable and concealable.
I have two 23's and I've been very pleased. Over 10k rounds through both of them, and I've never experienced a failure outside of two rounds of Wolf ammo which failed to fire. IMHO, the Glock 23 is the best carry gun available.
No other pistol compares when it comes to ease of maintenance and repair, simplicity, and reliabilty, in my experience. I've owned and shot lots of pistols, from Beretta's and Sig's to $2000 custom 1911's, and I've had the best luck with the Glock series. Nonetheless, no gun is perfect, and everybody is different.
FWIW, I've also got a G21 and a G17, and they're great, too
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As far as caliber goes, I've tested most major brands and calibers of ammo in everthing from gelatin and newspapers to hogs and cars, and in the "big three", i.e. 9mm, .40, and .45 there isn't a nickel's worth of difference provided you choose a good round. I've got a Ziploc bag full of expanded bullets and it's difficult to tell them apart. Penetration is the key, and in .40 any standard, non-premium load in 180gr weight will do nicely. For those who insist on "premium", the 180gr ProLoad or the 180gr Rem. Golden Saber would be my choices. The majority of 180gr .40 loads will expand to around 65-68 cal. and penetrate around 13-16" of tissue, which is almost identical to most 230gr .45 loads. Again, there's not enough difference IMHO to matter. Shot placement and deep penetration are the priorities.
Best regards,
Clayton
[This message has been edited by CH (edited 11-08-2001).]