Coming along nicely, Bill. Couple times I've wished I had a milling cutter exactly matching barrel dimensions! But there are always little 0.001" differences that do show up. Easier - and more accurate - to get close, finish with the chisels and scrapers.
I do have a couple scrapers with sharp, 45 deg edges, but still a couple thousandths shy. And several round scrapers for ye olde round barrels. Easy to make and put a handle on.