I did not read all 73 replies- but, stick with the published recipe- primer bullet powder can ccase. each company published their loads based on testing through a pressure gun so what they say is what they experienced.
If there is one area where I may switch components, it would be brass, but always start at the low end and work up- we cannot even estimate pressure, other than when it gets obviously high, like ruptured cases and blown primers (or a blown gun...).
Never exceed published loads and use the components named int eh guide. And, since it is a 38spl and a classic revolver, stick to loads for accuracy over velocity- it is a 38 spl.
I don’t recall seeing what the purpose of the load is, but usually 125 JHPs bespeak of defense loads- my recommendation is bump up to a modern CC platform and use commercial ammo.
That's the idea. Don't want +P pressures.
I load my 357s right at +P velocities. Easier on the gun and the gunner. Most of my 357s are classics and don't get shot much anyway.
I do have a Ruger GP100 stainless that's built like a tank and ......