Stay away from Sam's club briskets, some of them have been previously frozen. I bought a smaller brisket (5.7 pounds) from Sams club last Friday because I wanted to have some Texas styled BBQ and I have a pretty good recipe for smoked brisket. So Saturday afternoon/evening I slather it with some good old fashioned brown mustard and apply my rub so it can sit overnight. I dug thru all their briskets just to find a small one with a nice fat cap on it. Sunday morning comes around, I figured 6 hours should do the trick, so I stick the brisket in the smoker around 11:00 apply smoke, keep the temp at 250 yada yada yada,,, I take it out at 5 on the dot and its looking good (sorry no q-view, I was busy storm prepping for a possible Tropical Storm). The internal temp is at 160 and when I pulled out the thermometer the juice is just gushing out. So I let it rest for like 1/2 hour and slice it up against the grain. I serve it and its just wonderful, except for one thing, it was tough, not dry but rather firm. Now, I've cooked several briskets and they've never turned out tough. The only thing I could come up by looking at the color of the sliced brisket is that the meat was frozen sometime prior to me buying it. With that said, the only place Ill be buying a brisket from now on will be from a butcher shop.