Teddy you really don't need more than 150 GR'S.for black bears.If your gun likes 150s shoot em.The most important thing is GR'S construction.Use a well put together bullet like Nozelrs,Barns,or the like and you'll have your bear.Hitting them in the foot will not do it .lol.Making sure you hit em in the boiler room,neck,spine,or shoulder will get em every time as long as you use a bullet made to do the job.Good luck to you all on your hunt.