If you have a CCW license you should have the proper training to carry a concealed weapon chambered. I went through the course and it is an 8 hour total course including the shooting range, and about 75% was on saftey, and holsters and conceal locations, also depending on what you wear and if your CCW was to big to conceal according to how you normally dress, weight, height etc.. At the shooting range the instructor had various caliber dummy bullets and would reload a mag with 1 or 2 dummies in each magazines to simulate a dud (not knowing where the dud was in the mag) so we could manualy eject that round to get a new round loaded. I carry a Model 22 Glock .40 Cal, I also have a .45 cal conversion barrel and .45 cal mags and a .357 conversion barrel and mags for the Glock model 22. Alot of people don't know how versital the Glock really is, any Glock can be converted into ANY size caliber handgun for about $100 -$150 plus the cost of mags... Be Safe out there an always be prepared.