Hi all I drew a permit for fall black bear this fall. This will be my first time and I am going with an experienced friend. My question is this: I customized a couple of old rifles; a Yugo Mauser and a Nagant carbine. Will the 8mm or 7.62X54 rounds be sufficient for use on a Blackie? or should I use this as an excuse to pick up a 45-70 ( one of my fav. rounds) or the old trusty 30-06? Thanks Russ