Venom Cannon is still a simi automatic sniper rifle.

[Valvatorez Jr.Commissar]

Even after the nerf, the Venom Cannon still functions like a simi automatic sniper rifle if players can hit their reload button quick enough. As most people set the reload function to the third mouse button. It also doesn't help that the only other offensive Astartes Tier 2 the Veteran can do very little against him if the Carnifex shoots from beyond his range or strafes his Plasma bolts.