Mark, i killed a brownie on Kodiak this spring at 178 yards with a 338 rum shooting 210hht @ 3462 fps, bear was quartering towards me bullet went in forward the left front shoulder through ribs, shredded the lungs and exited back right side rib cage 42" penetration. It rocked the bear back, he spun and ran left quartering away, second shot entered left side raking back ribs, breaking 4 going in through lungs out front rib cage, into neck, penetrated length of neck and ended up under the skin behind his right ear, effect was a cartwheel unto his back, dead, 41-42" penetration! The initial shot once inside the forward shoulder you could have stuck your fist in. The guide said in 85 grizz/ brownie kills he has been in on, that was most damage he ever saw a bullet do! The impact speed on the bullet should have been around 3113 fps. This load was accurate and flat out flying! The bear squared 9'8" with no tail, if he had a tail may have been a 9'10" bear or a hair more, 27 12/16 this skull with a beautiful hide.
Copper mono bullets at high velocity are amazingly deadly with great penetration along with high damage. Kinda best of both worlds