Try for about 16 oz.. depending on size of the brisket. Try a checkerboard pattern around every inch or so.. Inject with the grain, not against.
22" WSM & Kettle
Former owner: Jambo, Klose BYC, Med. Spicewine, Pitts & Spitts, XL & (2) Med. BGE's, (2) 18" WSM's