I had no problems with my Sig P232 except for a spongy trigger return.
I called Sig and they told me to remove the grips and see if the rubber on the grips were snagging the trigger .
They were, so I sanded the inside of my grip and have never had another problem.
Mine shoots fine and I don't believe I've got 600 rounds through it yet.
I think I'd send it back to Sig and let them fix it.