I'm looking for a .357 wheelgun with a 3" barrel for daily carry. I've been carrying a S&W 640 in .38, but while I love the little snubbie and I've become quite accurate with it, I want something bigger and with more power. In Argentina hollow point bullets are forbidden for defensive use (which means I can't load my 640 with any of the good +P stuff). I use a S&W 686 with a 4" barrel for home defense and outdoors carry, but it's too big for daily use. Climate down here is quite warm, a fleece vest or a sweater are the heaviest clothes I wear (and I take them off as soon as I get to work). A 3" barrel gun in .357 seems like a good compromise. I've been looking at a used S&W 66, which feels great in my hand and has a sweet double action trigger pull. But I don't know if it's as strong as the Rugers (I plan to practice a lot with it, using magnum ammo 95% of the time), and the adjustable sights might not be ideal for a concealed carry revolver. I know 3" barrel 66's are somewhat rare. For about the same amount of money I can get a new GP100 or SP101, I only have experience with Ruger single actions, but the general consensus is that their double action guns are built like tanks. The GP100 would be my first choice, 6 shots and a bit more weight. Is the SP101 much easier to conceal? I'd trade a round for a significant increase in comfort (plus, I intend to pocket carry my 640 as a BUG).