Most modern departments and agencies have specific policies and directives prohibiting anything from being carried over the base of the spine. Never mind a handgun, most Chiefs won't let their officers wear their handcuff case in that position!
http://www.thegunzone.com/sob_is_bad.html
http://concealedcarryforum.com/forum/topic.asp?TOPIC_ID=1004
http://www.thehighroad.org/archive/index.php/t-567359.html
http://www.policemag.com/Forums/Pol...aled-Carry/Best-off-duty-gun-and-holster.aspx
Yeah, I've seen most of those before, and can also point you to several posts on knife forums talking about "edge packing" on forged knives. The fact that lots of people say it doesn't make it true. I know for a fact that it's true that many departments don't allow SOB carry, but again, that doesn't nail it down as a legitimate concern (the injury, I mean, not the drawing problems). After all, almost all of the makers of 1911s went to full length guide rods for awhile, based on the certain knowledge that it would reduce spring binding. Of course, after a few years of pistols that couldn't be stripped in the field without tools, and a little memory searching, people started remembering that they never saw a spring bind on the old design, and you're seeing more and more high-end pistols hitting the market with half length rods. Even Massaad Ayoob--giant 1911 accessory fanatic that he is--now admits that full length guide rods were really a bit of a solution searching for a problem. Yet, for years, it was common wisdom that you MUST have that feature, because one guy wrote about it in a gun magazine and then everybody parroted it.
That said, in this case, I think there may be some basis for the injury concern--but again "some" as opposed to definite, and my own experience just doesn't support the common wisdom. Getting away from the injury aspect for a minute, guns that travel on my strong side are trapped in a vehicle by a seatbelt, and dig into my side the whole way. IWB SOB carries so comfortable for me that I forget it's there (have to remember to reduce the lumbar support of the seat, of course) and I've never had any problems getting to it. Tucked strong side just simply does not work--again, for me--as far as concealment goes. I've seen plenty of people for whom it DOES work, but I also notice most of them have a healthy helping of love handle that helps mask the profile, which is something that I, to date, have not acquired. You can stick a Walther PPK on my side in a tucked holster and tell there's something there, let alone a full sized pistol. I will grant that the reaching behind thing with SOB
does kind of bother me for the sake of possible trigger engagement under stress, and have thought about switching away from my lightened-trigger Glock to my decocking Walter P99 for that very reason. Really, though, it's about training to minimize risk, you can't ever be RID of risk.
Anyway, back to the topic at hand---IWB works tremendously well for knives, and I think many of the knife buying public would be enjoying the benefits of it now if it weren't for all manufacturers insisting on calling it a "pocket clip."