GETTING MY WHERE TO BUY AMMO TO WORK

In the 1st a hundred I had a fired shell jam Hence the action could not even open. This was my S&W M&P nine which cycles Everything. Had to hammer a screwdriver down the barrel. Almost everything fired great yet again until slightly over 300 rounds and had exactly the same sort of jam, apart from it had been Dwell! I whacked the gun in opposition t