Around the summer of 1990, I sold my S&W Mod 5906 & purchased a S&W Mod. 1006 10mm (I Had to be one of the first kids on my block with this new toy). Well, I love Smith & Wesson and it seems that I'm one of the few who actually appreciated Smith's 3rd generation auto' pistols but... My 1006 was a complete lemon. There were times when it literally would not fire! Range sessions, with various factory loads, often resulted in a "Click, click, click, Bang!" I had sent the pistol back to S&W twice for repair with the same result. Three years after buying "The ten," I sent it back to S&W for a third time, demanding that it be replaced. By this time, the .40 had come out and all but killed the 10mm. Ammo became difficult to find and, when it could be found, the price was a small fortune (At least for my wallet). A few days after sending the pistol off, I received a phone call from a very nice lady from S&W (I can't remember her name, now). She agreed that the pistol needed to be replaced but added that they didn't have any in stock at this time and it might take a few weeks to manufacture one...... "The factory that makes these things doesn't have any in stock?!" Little red flags began jumping up around my head. Noting that she may not have the authority to do this, I asked this pleasant person if they had any 4506's in stock. "Would you rather have a .45?" She asked (Now, that is customer service)! Literally dancing with joy, I answered in the affirmative! Talk about killing two birds with one stone! Not only would I be receiving a pistol that worked, I would also be able to afford to shoot it! The 4506 was one of my favorite pistols. Function was absolutely flawless and its accuracy was... Well, this pistol shot a lot straighter than I did. As a Police Officer, I used to carry this as an off-duty gun!! My mistake. After all, the 4506 is much more appropriate as a duty gun and even then is a little heavy to be packing around all day. This became my night stand gun for the last few years but I got to the point where I never actually carried it. Eventually, this was one of those guns that "got away." Traded in for a much easier to carry/conceal SIG P239. I did love that 4506, though. And I still think the 10mm is a great defensive caliber (Providing it's in a gun that works)!