User blog comment:Callummacdonald79/Dreadknight or Riptide?/@comment-5880884-20130424104443/@comment-3580035-20130424115545

On tabletop, if you actually do some dice-rolling, it is possible for a Riptide to beat up a Dreadknight thats been hurt a bit by some shooting earlier.

That Psycannon fluff was retconned in the new codex. Even then, it only passed through all forms of energy fields, but still had to penetrate armour the hard way. Now, they are the equivalent in power to two autocannons stuck together when standing still, and a single autocannon on the move (with extra punch when used against Daemons).