Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

The two function very differently, as well. Do you want to bash nid faces in close combat after filling them with solid slugs? Shotguns. Do you want to sit back and pick them off with long range fire? Snipers. Bolters would be best imo, as you get the AP bonus lost on the shotguns along with some extra range.

But, if there are only the two to choose from, follow Book's advice.