Is a 30-6 too small of a round to kill a black or grezley bear? looking for a bigger deer rifle i use a sks(7.62x39)or my 357 marlin right know and was thinking of geting a 30-6 or a 300 windmag or a rem 700 .and have a freind in maine that i could go see and do a bear hunt but i need a bigger gun first i will proble buy what ever i can get the best deal on .thanks for your info