i have got a new 308 BLR, i want to use it for a bear gun. is 308 a ok caliber for black bears? 3-500 pound canadian ones my concern is power, expansion and range. last year when i tangled with bears using a 7mm-mag i had over penetration and no expansion. the bear i shot cried out jumped up and ran off lung shot( we got it still). i have also purchased a 45 70 marlin guide gun. while i doubt i would have expansion issiues(and with a 45 cal entrance hole who cares), range, accuracy and speed of loading now concerns me the best i can get with this gun is a 2-3 inch group with every 5th shot going wild. the BLR seems a strait shooter and has a fast action with easy loading drop-in mags but i am concerned about the cartridge size. i want something that can reach out and drop that bear! could this BLR be it?