One error I made was not tapering the breech plug. It's a Rice Barrel and I thought I had already tapered the plug and didn't. Should have measured it, AGAIN. Ended up with a small gap that I made a judicial patch for. Won't show in the big scheme, but an annoyance, to say the least, causing rework. I hate inletting breech plug/tangs. I think the whole barrel inlet is easier overall, less things to go wrong.