Reloading for the 7.62x38R-update

I found a collet that barely works for holding the case in the lathe..can't remember what size I ended up using but I had to draw it up pretty tight and run the case more than 3/4 of the way in for it to hold. Even then the case would still migrate, a wrap around shim would have worked to make the case hold fast. I was turning the thickness of the rim down a bit from the top side of the rim. I have not yet turned out the old head stamps using the lathe but that will be done sooner than later. The needle file was working but the finish it left was poor which is why I just chucked the cases up in the lathe and thinned the rims a bit. Where function was test and retry with the needle files the amount I took off with the lathe does not leave any question that these cases will work in all the chambers of the revolver with no question marks left. May try to make a set of K frame sized grips for this gun since I've enjoyed shooting it so much but the grip it comes with is too small.