A 4" K-frame with full house 125 gr. Magnum loads is an attention getter for me. I can shoot it pretty well but I really have to stay focused and also limit my practice sessions to no more than 100 rounds. Remington used to make a mid-range 125 gr. load that ran at 1,250 fps instead of the full house 1,450 fps velocity. I really liked that load or the 145 gr. Winchester Silvertip hollow points. Those two didn't have that obnoxious muzzle blast of the full velocity loads.
You might watch those lite bullets in a k frame. If my memory serves me correctly that has been known to cause forcing cone problems.
I'm talking full house loads. You need to stay with 140 plus grain bullets. Hasbeen
