I've flown a lot and declared/checked my gun through TSA. My question is... if me and two friends are going on a hunt and my case will hold three shotguns, can we put all three in one case? I heard someone say that you can't check anyone else's gun in one case. I know you can take up to 4 shotguns if they belong to you, in one case. Just didn't know if I could check my gun in a case with theirs in the same case.