The thing I like about the TBBC in a 30 cal. Is the fact that it makes a decent size exit hole. At least 1.5 and often 2" wide. When hunting Grizzlies especially with a .30 cal your gonna appreciate this. It is arguably the best lead tipped bullet on the market and is a weight forward bullet.It mushrooms perfectly and is designed to plow and keep on plowing.I have only witnessed one TBBC bullet found on a moose that my cousin shot with a .270 it didn't penetrate the other side but what a beautiful mushroom. The Stamp label on the base of the bullet was untouched and like I said the most perfect mushroom I've ever seen a bullet make. The only downside to these bullets is price, but when your dealing with bears price is nothing.The moose was quatering away from my cousin when he shot it and it plowed head first into the ground.If you choose a .30 cal rifle this bullet would be your best choice.