I wouldnt use a bt on bear, i think a bears fur and hide would be thicker than a deer,i have had a bad experince with bt out of a 06 so i dont use them any more,i use lead nose bullets in all my deer rifles,i use speer 120gr hot core bullets out of my 25-06 they work well and stay together , i think speer changed the name of the hot core bullets to deep curl or full curl and they are a great bullet and stay together well