1500 lb ME is considered minimum for Elk Black Bear would be included in this. The big Bears however might require a bit more. A 45-70 will do the job as would the 444 and 450 Marlins. The 7 Mags and 30-06's and even 270's have taken all Game in North America. For the big Bears for me, a minimum of 30-06 or 7 Mag would be my choice along with the 45-70. I have never been a fan of the 338 and would jump to the 375 H&H if my smaller guns would not suffice.