bought alot of used 30-30 brass once fired. I have Lee dies and single stage Lee Press, I know about the deprim and size with the first Die, but I'm finding such a vast difference of sizes, I'm second guessing myself. The Lyman reloading book for 30-30 trim length is 2.028, however some are longer like 2.039 that can be trimmed, but it's the brass that are shorter like 2.016 or 2.012. I'm thinking of makeing the shorter brass to the 2.028 for uniformity. Now how can I do this?