I wouldnt use just loose shot. It will have an impact jack hammer effect on your reciever and can lead to stress cracks. Any weight added into a buffer needs to be solidly in place so it cant move as the buffer cycles
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent