A few min ago I heard a very loud gunshot, like a handgun or rifle. My grandparents live 5 houses down, so I wanted to check on them. I didnt want to go unarmed so I grabbed my knife necklace and my 870. The only shells I have are birdshot and 3in steel BB. I used the BB and checked on the grandparents and came home. My only other guns that are here are my sks with five fmj rounds, A ruger 10-22 with a scope and a unscoped m700 30-06. Did I do the right thing by checking on my grandparents, and did I use the best gun and ammo?