After being returned for coming unlocked when firing, we finally got to try it out, 3 malfunctions in less than 100 rounds. This is my brothers gun, and he called S&W yesterday, and got a gentleman, (term used very loosely), who said that 440 grain bullets are just too heavy for the gun, and we needed to drop to 350 grainers to solve this problem. Ummm, NO. This thing was never sold with this stipulation, and this should be a non-issue. He then said because it kicks so hard, we were accidentally pulling the trigger twice, causing the problem. When my brother said the cylinder is rotating backwards onto an empty case, not forward, the guy didn't know what to say. He says it's our problem but if we wanted to send it back, fine, but don't expect them to find anything wrong. This gun has malfunctioned with several shooters, and with loads as mild as 1,200 fps. In the course of less than 400 rounds, it has malfunctioned at least 5 times. They won't be getting a nice letter this time. This will be their last shot at fixing it, after that, it's refund or replace.