I have a 6" M28 and can say they will handle heavy loads well, I have shot 180's at some impressive speeds out of mine. The only thing that would make me choose the Ruger is if the cylinder is longer. The cylinder on a 28 is stupidly short, a J frame S&W will handle a longer bullet. The cylinder is however long enough for most heavy bullets, you just need to pay attention to the nose to crimp length. I would bet the S&W has a much better single action trigger, which is vital to accuracy. Both are good guns, pick the one you like.l