User blog comment:Legionaire22/Primarch Feats of Strength/@comment-1583177-20130628225917

In case you're interested I know the psychic abilites of some primarchs:

Perturabo is able to make weaponry go haywire, causing bolt shells to explode in the guns of the imperial fists fighting him.

Curze had his precognition, as well as this he could release a concussive blast.

Kahn can talk to storms apparently, probably allowing weather minipulation.

Sanguinius Had foresight (apparently) and there seems to be psychic bond between the Blood angels and their primarch, shown when sanguinus felt the pain of his sons as they were killed, and likewise when he was wounded the blood angels fell into the black rage.

Ferrus can create amazing weaponry, so they're is probably some psychic skill (or maybe some sort of ctan power) allowing him to place a little of himself in his weapons).

Magnus was the psychic monster we all know, so I wont go into it here.

Lorgar became a powerful psyker after cutting loose with his power, and apparently could summon psychic wings to swoop towards his target.

Corax could apparently create a "someone elses problem field" wherein he rendered himself unimportant to the people he wished (kinda like when you search for your keys and you cannot find then, even when they are staring you in the face.

Alpharius and Omeagon could apparently (though I'm unsure of the validity of the info) communicate telepathically between each other.