I use the 10.3X60R Swiss cases in a Woodward DR. They work fine. I have grove diameters of 0.412 and 0.413. For neck sizing and bullet seating, I use a (Hornady, I think) 7/8X14 die that accepts various ID sleeves; there are a considerable range of sleeves available at reasonable price. This combo works well. It may take a try or two to get the best size sleeve.

Indeed, a lathe is a necessity of life! Not only is this stuff easy to make, it is down-right fun.

DDA