I know,I killed 2 squirrels with a 50+ year old H&R 488 .410,but the day after I killed them,I went to shoot at one.CLICK,pulled the hammer back again,CLICK.Waited bout a minute,broke it open,the primer didn't have a dent in it.Firing pin was broke.Then one day I was looking for the serial # on it,I found it, then I just pulled the hammer back on it,I put my thumb on the hammer and pulled the trigger,the hammer locked back.I took it to a gunsmith and he said it was the main trigger spring,and the guide rod,and it needed a firin pin.That was my grandaddys gun.I just wanted to get a new Mossberg 500, cause'I like huntin with a .410.It don't ruin meat if you shoot one under about 15 yards.I like my 12 gauge for out to about 35 or 40 yards. thanks