New member, same issue. Mine (SD40VE, new-3 months old) has ~ 300 rounds through it with no problems. Federal only, 180 gr. FMJ.
HP only loaded for HD-never fired.
Last trip to the range, fired once and stovepiped. Ejected mag and cleared round-appeared to be partially in the chamber, nose up.
Re-inserted magazine, racked the slide and-jam.
Repeat.
Repeat.
Never fired the pistol again, rounds would apparently get stuck under the ejector-wouldn't slide under it.
Changed ammo and magazine to Fiocci 170 gr. FMJ.
Repeat. Jam.
Cleared the pistol, cleared both magazines and sent back to S&W for repair.
23 days ago.
Purchased S&W M&P Shield40 for the interim.
Opinions?