The 250 does group well but you have to do your part. Couple of days ago I shot my Sigma 9mm and my Sig P250 40sw. 50 rounds of UMC HPs for each gun. I usually grouped better with my 9mm but not this time, the 40 did better and I wished I brought my camera but I'm sure I can do it again.
I've been working with my trigger control and my handholds. The trigger control I got it down pat and a small adjustment with my left hand had made a world of difference. My 40 was lot steadier then and I was able to aim for the upper chest, neck and head and hit 'em.
It was a good day.
Oh yeah, I was shooting at 25 feet.