I just bought my first Sig and brought it to the range today.  I put about 250 rounds through it this afternoon and had some issues.  I had about ten stove pipes and the slide failed to lock back on the last round.  I think the issue was the ammo I was shooting.  I was shooting my IPSC reloads which chrono at about 165 power factor.  I am not really sure.  I will have to get the springs worn in and bump up my reloads to see if that solved the problem.  

Other then the jams I loved the ergonomics of the gun.  It fit nice in my hand and feld great to shoot.  

One question for the group.  Do I need to worry about harsh cleaners with this gun?  I use Hoppes on all my guns but was not sure about the darkened stainless slide.