I read the long thread on here about it and added this to my notes:
Summary
* Buy a whole, untrimmed 10-12 pound USDA Select or ungraded packer brisket.
* Trim fat at the seam between the point and flat sections. Trim the fat side to about 1/4" thick.
* Apply your favorite rub and refrigerate overnight.
* Cook the brisket fat-side down at 325-375°F for 2 to 2-1/2 hours to an internal temperature of 170°F.
* Wrap in foil fat-side up and cook another 2 to 2-1/2 hours until fork tender.
* Rest in foil for 30 minutes before slicing.
My notes from my best results cook:
14.75 lbs brisket; trimmed about 2.5 off.
Rubbed night before with black pepper, salt, onion powder, cumin, paprika, Cavender’s Greek Seasoning, etc. (went light on black pepper; omitted usual cayenne; heavy on garlic and onion powders).
Morning: Injected with beef broth.
Weather: Temp in 60s; wind 10 to 15; had to use some blocking
Filled charcoal ring with Stubb’s; removed a can full and lit it. Added back on with chunks of hickory, apple, and cherry. Let all get lit well. Assembled with broken pizza stone and a cover of foil in the water pan.
10:00 Meat on; vents 100%
10:30 WSM at 275; flipped door and propped on chimney starter to let more air in
11:30 WSM up to 350; down to 325 in next hour
12:30 Tossed a few extra briquettes on with tongs; insurance because wind is whipping.
1:30 Meat at 168 in point 3.5 hours in; foiled with couple layers of HD foil. (Have reached this stage in only 2.5 before; large brisket and wind delayed it today)
2:00 Put door back on since we are home for a while, no rush. WSM went to 250 or so after.
3:15 Thermopen went in like into butter. Read 210 in thick; put in ice chest wrapped in towel.
6:30 Sliced with electric knife. Can drape slice over finger, and it will hang without breaking. Meat is still very hot.
Best brisket results yet. Tip: slice into middle of point and eat the good moist point meat when it is hot; eat thin and less moist flat later, though even the end of the flat was moist on this one.