I had the same problem w several SP2340s; slide would hang up just before lock up. A slight nudge was needed to get it all the way fwd. Did not happen w the 357 bbls in them, just the 40s at first, but then I ran into a 357 that did it too.
Called SIG, they said they hear that a lot, just shoot/lube it more!? That I could send it in but there realy wasn't anything to fix!?
Turns out the lug under the barrel needs a little more polishing on some of their bbls. That fixed the problem on several w/o a trip to SIG. YMMV.
It's a good gun, but I think if SIG had kept the same barrel/locking block system and take down it would have been better. I know it works fine on the P210, but I still like the other better.
The HS2000/SAXD is more what I thought SIGs polymer pistol would look like, and is the better of the two designs IMO. Even better than Glock/HK. :wink: