Speer #8 - 1970
.38 Special - Speer/DWM cases, CCI 500
158-gr. SWC or RN - 9.0 to 10.0 - 1007 to 1136 fps
110-gr. JHP - 11.0 to 13.0 - 1160 to 1359
146-gr. Speer HP - 8.0 to 10.0 - 867 to 1079
160-gr. Speer SP - 8.0 to 10.0 - 900 to 1089
.357 Magnum - Speer cases, CCI 500
158-gr. LSWC or LRN...
May I suggest Williams Fire sights.
Best $60 upgrade for older eyes and takes minutes to install. Ruger should've stayed with Williams. They're twice what Hi-viz are.
JMHO
Here's 1 of my favorite designs. Appears to be pretty simple too. I acquired a complete stamp outfit and this will be the first design I'm going to attempt.
https://epsaddlery.com/product/allegiance/
Use a brand new center punch
Use a quality cutting oil while drilling
Use new cobalt bits (pilot & final size)
Make damn sure you drill at the correct angles
Or take it to a professional.