I never shot in there, but I once t bagged the cave as 6 Guardian's shot into it. I was a scrubby level 12 running around collecting the material found on earth and I saw shiny green ammo inside the cave. I ran in, and saw all the guys shooting from a distance so I t bagged around the cave collecting everything, of course back then I used to think that all the ammo and engrams would drop and visible to everyone and it would belong to the first person to get it. The good ol days...