Wolfer, This is pretty typical of cb hollow points in a rifle. Just a week ago I shot a medium-sized buck (about 160 lbs. we're talking big northern whitetails here). Bullet used was a 190 grn. Lee with a drilled hp from my .308 at 150 yards. Muzz.velocity is 1950+-. Almost identical to your description, lungs looked like he swallowed a grenade but small exit hole. As we had 3" of snow I was lucky enough to follow the bullet track and found the slug. Nose was blown off to resemble a flat cylinder and weighs 155 grns. Bullet failure? Hell no he made it about 10 yards and piled up. Odicoilius Manitoba Canada