Hi All, I was considering changing the barrel on my Sig P220 in .45 ACP to get tighter groupings and improve accuracy. Bar-Sto was recently recommended on the Shooting USA show. They mention both the semi-drop in and the match barrels. First, does anyone have any experience with the semi-drop in? Second, what additional costs will I encounter at the gunsmith if I buy the match barrel? This is a firearm primarily for CCW, and then used at the range to be proficient. I wasn't sure it was worth spending the extra money for a match barrel that is in a CCW gun. Any information and opinions would be greatly appreciated. Thanks in advance.