Mike, how does that work out for you? I checked the dimensions and the 38-55 has a rim .020 too large, a base .008 too small, and will only make 54mm in length using the long ones. Besides, these days 9.3x72R brass is just as easy to come by as 38-55;-) I was just what-iffing with Hoot. I have 3 rifles in 9.3x57R (360) and plenty of brass for them I've made from 9.3x72R. I had a 9.3x82R rifle one time and that was a little trickier to feed properly.