many, many thanks for the info.
I did go to the hardware store and got a 1/8 inch roll pin. I thought the holes in the meprosight looked somewhat small, but I drove it in anyway. Well when I got the roll pin through, the sight would cant back and forth. The roll pin is compressed undersized in the sight, allowing slack with the factory notch in the barrel. I dont know what I was thinking, I should have known better.
Apparently the sight is made with the holes undersized so that it can be reamed to an exact fit, which is good.
Seeing where I am eventually gonna have the barrel cut down by great west, I think I am gonna go ahead with the 1/8 reamer, and match the barrel and sight together. However, I may go ahead and call ruger just to see if they will give me a spec.
