I have a model 19-6 and had heard some rumors about using less than 158 gr. 357 rounds and using alot of 158 gr bullets could cause a crack a 6 o'clock of the forcing cone. I have shot about 30 rounds of 158 gr 357 bullets and 70 .38 special through mine. Checked it as soon as I saw the article on the internet. It looks good but I wanted to know if any of you fine folks on this forum had heard of this or experienced it 1st hand.