First off, this is not like it sounds. I have a friend who has been kind enough to allow us to set up a private range on his property. He has 240 acres on top of a mountain. The property is over run with Mountain lions and has some bears. Up above where he plowed out the range is a kill spot where the mountain lions have hauled up carcases. The range area is situated in a bowl shaped area. So on with the story. My friend and I were shooting and as we got done with our string of fire and were reloading we heard some very big stepsd in the brush. Now I have been camping my entire life and I know what the woods sound like and there was deffinatley something out there. So I slammed home a fresh magazine and backed to the center of the clearing and waited. We heard some more steps going across our front then moving away. We waited a bit and heard nothing else and went back to shooting. So now my question is this. The owner of the property is saying that it was probably a bear. He says that the bears will come to the sounds of shots inorder to see if you have killed anything they can eat. So now I am worried about a angry bear. it was recommended to me to keep a 12gague with slugs handy for protection. Do you all think that my Remington 870 loaded with Winchester Super X rifled hollow point Slugs. Would these be good adainst a bear? Also if it was a Mountain lion would the slugs also be good. Would a .45 acp be efective against a mountain lion. Thanks for any help. I appreciate you all reading all of this.