Originally Posted by Trixie
Actually, a lot of IG officers in Cain series seems to use bolt weapons, not to mention covers of books in said series...
The covers of the Cain books are basically propaganda posters. They show CAIN using a bolt pistol, even though in the books, he turns down anything higher powered than his laspistol because his experience with the laspistol makes aiming it reflexive for him. They also show him standing triumphantly among the corpses of the enemies of the Imperium, which isn't particularly Cain-like.
And Colonels and Majors having bolt pistols is rather different from the rank and file getting the same; if I remember right, they don't even show any officers below that using bolt weapons, though I might be wrong. Heavy bolters are used as support weapons, and regular bolters don't come up much, as far as I remember.
Even Cain's suicide mission squad in For the Emperor
, when getting armed with better armor and weapons, only gets hellguns, not bolters. Vail uses a bolt pistol, and Cain keeps his trusty laspistol.