Ok I started with 7th ed and I'm playing Space Marines. I noticed that Sternguard get special ammunition for Boltguns and was wondering if that included their Bolt Pistols, Storm Bolters and Heavy Bolters. I've checked the FAQ, nothing, and I've done a lot of googling looking for answers. So far all of the answers have been for 5th and 6th edition and have been pretty solidly "NO!"
My confusion is coming from pp. 176 of the 7th ed BRB "Ranged Weapons of the 41st Millennium." On that page it has a section for "Boltguns" under which it lists: Bolt pistol, Boltgun, Storm bolter, Heavy bolter and Vulcan mega-bolter.
So according to the BRB all of those are considered Boltguns, so does that mean they can all take special ammunition? And if not then what's the point in taking Storm bolters? Especially when another Sternguard costs less than giving them to every member of the initial squad?
I know that this question has been answered before for previous editions, but considering the 7th ed BRB says all bolt weapons are boltguns and I'm new I want to be super clear on this issue. Thank you.