Ends up 2.405 case length, .605 rim, .500 casehead, .494 at shoulder, 25 deg. shoulder, didn't measure the neck but didn't change from the .38-80 pictured above. Worked over the receiver tonight and it's feeding really well. Will modify the mag tomorrow and she'll be ready to throw in a stock. Might make elk season opener if I can figure out how to seat the bullet. Going to send brass away to Lee for custom dies but that's gonna take a bit.