The problem is a full burst is 10 bullets or 20DV which is the same as a high explosive grenade vs a barrier. You get 2 hits on your shooting test and its a 22dv with the smg, but still 20 with the grenade. So yeah it takes a lot of bullets, but a lot of guns can spew out a lot of bullets. Bullets chew through a lot of barriers by the rules. Unless there is a reason I have to stick to RAW, I change that rule up front.
Actually, it's the
modified DV that gets adjusted to 2 DV per bullet, so it's still 20 vs 20, Shinobi.