Here is a quick and dirty range report after shooting only 200 rounds today due to time & my wife. Total rounds through the 250c so far is about 400 including todays 100, obviously still learning to shoot it. It was my first time shooting the 250sub.
Put 100 WWB down range with the 250c and the only issue I had was with one of my magazines the slide would not lock open after the last round. The other mag had no problems. Other than that knock wood, no issues what so ever, shot like a dream. Here is a pic from the cell phone after my last 15 from 25 feet slow fire (the 2 head & neck/shoulder are from shooting the 250sub rapid fire at 25 feet and trying to get 2 in the head.

Second 100 rounds, also WWB, went to the 250sub. The 250sub was an awesome little gun to shoot. I was surprised not only with how smooth and easy it was to shoot, but also how accurate it was for such a small gun.

I didn't take any pics of the targets I shot with it however in the above picture you can see that at 25 feet rapid fire I did get the one head shot and the second head shot ended up in the neck/shoulder area. Not bad, and considering this was my first time shooting the 250sub I was needless to say very happy with it. Unlike the big brother 250c, the sub had no issues with the slide locking back after the last round.
Overall I love them both!!

I have the 250c as my winter carry and even in summer wth cargo shorts and a t-shirt I think the MTAC will hide it quite well. The 250sub is a given for super easy concealed carry. Two big thumbs up to both of them. I had my doubts with all the teething problems they have had but it seems as though Sig has worked those out.
Hope you enjoyed the report.
Stay safe all!