Hello

This is what I use and have great results from my model-19 4" and my models 27 3.5/5" colt .357 6". One thing you might check is how soft are the Hornaday 158 gr. I use a hard cast 158 gr. swc and 148 gr wc. For the 158 gr. swc its is over 5.1 gr. 231 small pistol primer. the 148 gr wc is over 3.5 gr. 231 small pistol primer. I also use .357 brass not .38 special it works out better for me on cleaning the cylinder throat.Also a good crimp helps them burn even and clean. Hope this helps and good luck.

RB