I've got a corned beef weighing 6.68 pounds that I just put into the oven at 350. The package says to cook it 1 hour for every pound. That seems like an awfully long time, but I've never cooked such a large one before. I've braised large briskets (~7 pounds) in the oven, usually for 4 hours. So for how long should I keep this baby in the oven? Thanks!