Brisket yield varies, but 50% should be a conservative
For 200 people:
1/4 # each is 100 # pre-cook.
3/8 # each is 150 # pre-cook.
1/2 # each is 200 # pre-cook.
I would be looking at the 150 # level--maybe 11-13 packers depending on the size you can get.
Your yield may vary
"Flirtin' with Disaster" BBQ Team (RETIRED)
FBA and KCBS Cook and Judge.
Former owner of a WSM, a Smokey Joe, a Charbroil Commercial gasser (junk), and the legendary "StudeDera".
Now cooking with a FEC100, a Traeger Lil' Tex, and a Fast Eddy PG500
Proud Pellet guy cooking on real wood.