To start, I'm a fairly experienced handloader. That said, I'm NOT too proud to learn from others. I started loading my own in 1976, at the age of 10 (hey, it's the only way my dad could keep my in .243 ammo, and I was loading for HIM a few years later). I haven't fired a factory rifle cartridge in years, although I do use factory handgun ammo in some cases. Through the years, I've been through 3 different .40 S&W chambered handguns (Firestar, CZ 75b, G27), and I just bought my 4th, a G23. I've collected a decent pile of brass as a result, and I have dies left from when I owned a G20 some years back. I have never loaded a single round of .40 S&W ammo, although as I said, I've loaded 10mm (that wasn't optional with 10mm prices being what they are). I want to start by using up some loading stock I already have, and I'll experiment from there. From the 10mm, I still have a full box (100) of Sierra 165 gr "power jacket" bullets. I also have about a half box (50) of 165 gr Gold Dots. I'll use these to experiment with accuracy, feeding, and such. I also have a good supply of Federal 100 (small pistol primers), and Federal 200 (small magnum pistol primers). On hand, I have Power Pistol, Bullseye, Unique, and Blue Dot that should be acceptable in a .40 S&W. I have about 500 empties in the tumbler now. Sorry for the long winded start, but I wanted to try to avoid the obvious concerns involved with handloading. My question is, are there any concerns I should be aware of when loading .40 S&W, and more specifically, for the G23? I have a good supply of factory SD cartridges (Federal HST & Win Ranger), so these will be for "field" use (varmints, mostly). Thanks in advance for any replies. Daryl Wanna kill these ads? We can help!