Shooing some subsonic rounds for the AR. Shot 8 rounds and on the 9th round all I heard was a little pop and fizz. So there about 1 1/2" into the chamber is a 55g Hornady VMax. I've tried pounding it out going in through the muzzle and vice versa. No luck. Used a brass cleaning rod and then went to the hardware store and bought an aluminum rod. Tried to just tap it then I stuck the rod in my vise and "dropped" the upper onto the rod. Any help would be appreciated.