I called Bar-Sto today to order a replacement barrel for my 9 Tac. I was waiting for them to say "it'll take a few months". I lucked out and someone just canceled their order and one was available for immediate shipment. I told them to send it as-is oversized or what they call "Match Target". Having them make it semi drop-in would actually delay it a week so they could machine it down to size. I won't be fitting the barrel myself but what is involved with fitting a Bar-Sto? Does the chamber need to be reamed? What else needs to be trimmed?