Wait until you see what I have up my sleeve for the next build. I would do it on this build but I already have the .458 chamber reamer being made.
Without going into too much detail, the parent case for the next build will be the .50-70. They're already compliant in factory form at 1.75" case length, but I have an idea on how to improve it a bit while maintaining its compliance. It'll be my Michigan version of a half-inch rifle.