The whole purpose of my post which I did not indicate clearly in the beginning was that I wondered if shooting 38's out of a gun strictly chambered for 38's was a tad more accurate then shooting out of a 357. OR is the difference so small that I, an average shooter would never be able to tell the difference??
I bought a broken Model 65 4" from a buddy for next to nothing. He bought it as a police trade in and it would constantly break hammer noses (firing pins)
when I bought it, the gun appeared to have been this way since brand new and I determined it was not machined properly from the factory which was causing the hammer noses to break.
the gun action was sooooo smooooooooth, I believe it was probably designated as a dry fire or take away gun as the exterior surface has more scratches than Main Street on a Saturday night.
anyway, a little dremel action, a new hammer nose and pin and it has been going strong ever since. I have less than $150 total investment in the ruffy and I use it in a LEO competition.
I have been wanting to get a 38 special only gun to ring out the most accuracy, but I am not sure if I can get anymore out of a true 38sp gun with this type of accuracy out of a model 65 with 3.0 grains of 231 behind a 148 DEWC.
this group was from last years competition. ranges from 3, 7, 15 and 25 yards all NO barricade.
so to answer your question, for just general plinking 357 and 38 cylinders, you probably wont be able to wring out any further accuracy. I bought a Model 15 4" and got an action job which I would consider the best trigger I have ever felt in any K/L frame and cannot zero in on the accuracy I can achieve with my ruffy model 65 4".
this is my only pic of it right now as when I first got it, I had intentions of making it a R/B but the serial number was too close to do the job so it became my LEO comp piece.