I have had decent accuracy with my FS M&P's, just consistently low left, tight patterns. I was rifing the fence on Apex kits, but finally boke down and did the Burwell technique, and really lightened up the trigger. As far as objective measures, I don't have any. But my USPSA scores when from dead last to 50% at the first match after sear polishing. Also at the same match, I knocked down each steel with a single 115 gr round per target, down from from an average of 1.5 rounds per steel.