I don't agree with that part. The boltgun can be decent in PVE, it's efficient when dealing with gaunts. It's just that its lack of penetration makes it less effective against Warriors. AP rounds and the CQC barrel help. As for the stormbolter, I guess it's alright when firing into hordes of gaunts, but its accuracy isn't great, I personally don't like it. Plasmaguns and gravguns are great against Warriors due to their better penetration.