Thanks for the info, I'm glad there are no mechanical issues. The Bar-Sto barrel on my Glock 21 also cut my group size by about 25% with no effort on my part. Not that it's anything to brag about, even now. The SiG P220 is still my best shooter in .45ACP.
And I have a couple of handguns that shoot .357SiG, even though the factory never made one. I've been told that due to the much higher chamber pressures for the .357SiG, it's better to buy one in .357 right from the factory. Adding a .40S&W barrel later becomes an even bigger piece of cake.
Concur on the P-220 .... I agree as to its accuracy and reliability. Carried one as aDeputy and my primary concealed carry for a long time. I have a new Mk 25 Sig on order ..... Should be here next week according to my local papered gunrunner . Snagged a case of 147 gr Speer GDHP for it last week so will hopefully be at the range next weekend putting that through its paces..... Nite !