So a little background. On youth day this year my son shot his second deer ever, a doe. She ran off, and after he stopped shaking, we started tracking. She was bleeding very well, and the blood was getting heavier and heavier. I could see ahead a log with blood all down the side going to a steep ravine. I walked to it, looked down, and there is the biggest bear I have ever seen, about 25 yds away. I scramble back up to my son behind me, as he has the gun. we are watching this thing and it's huge. I am guessing over 300# easy. I text a game biologist buddy, and he states I'm screwed at this point, can't shoot the bear. after I get off the phone, another bear comes in behind us that scared the shit out of my son. I yelled at it and it ran off. The other big bear just watched. I tried to run it off by shooting the rifle off down the hill behind it. The bear wasn't too scared. it ran 10 feet, looked back, and just looked at us. we left. now this weekend is youth bear day here in VA, and my son wants revenge. I have a 6mm rem, shooting 100sbt bullets. It is cut off to fit him (he's 8.5 yrs old). Do you guys think this is enough gun? He has shot my full length stocked varmint rifle, but only off bi-pods or bench. Should I let him shoot one of my bigger caliber guns that doesn't fit him properly, that he might not be the best shot with, or is the 6mm enough for a larger bear? I know it sounds like a stupid question when I have bigger guns, but I also don't want him to make a questionable shot that is worse than a well placed one. I plan on taking him to the range to see if he can manage one of my adult sized guns this week sometime.