Just got back from the range. Only shot 100 rounds through it as we had a bunch of firearms with us. All 230gr FMJ (PMC Bronze) and all were flawless. It was also a test of my amateur gunsmithing skills, and the SRT worked great. I have it on all my Sigs.
I started off shooting low-left and had to work on my grip and squeeze as I shoot my Sigs the least of the handguns I own. But once I was comfortable with the grip, everything stayed in a mostly 2" group at 8 yds. A few strays of course =)
Definitely a keeper.
"Greater love has no one than this: to lay down one's life for one's friends." -John 15:13