I have to agree with bronco, i have shot bt for many years out of 25 and 30-06, 7mm mag and 300mag. all have performed flawlessly. I cant ever remember one not passing threw. shots have been from 10 yards to367 yards. granted i always try to shoot threw the lungs, but sometimes i have hit the shoulder.The longest shot i have ever made on a deer was with my 7 mag shooting 150gr bt,the deer was facing me and this is a shot that i dont like to take, but i knew the deer was not going to give me anything better. I had a bipod rest and no wind that day. The bullet entered midway into the chest and exited out the right back leg. Now if thats not pentration i dont know what is. Last year i loaded up some 165gr accubonds for my 300 mag,I shot a buck at 50 yards with it. Small entrance wound and small exit wound as well, making me think maybe it was to strongly constructed for deer, but i realize a person can not judge a bullet from only 1 animal. The deer only ran 40 yards before giving up the ghost, but i just thought it should have expanded more at such close range. Dont judge your bt one just a few deer, they are a fantastic bullet