Joined: Fri Dec 02, 2011 11:08 am Posts: 953 Location: Missouri (Misery?)
Page 21, 6th ed. Rulebook:
"An Overwatch attack is resolved a normal shooting attack ... and uses all the normal rules for range, line of sight, cover saves and so on." So, if they are within 12 inches, they would get both shots for Overwatch. Since they are trying to assault, they have to be within 12 inches to declare the charge. This can affect some weapons that have shorter ranges, like Melta pistols or Hot-Shot weapons. The exception is Flamer weapons, who get the D3 hits automatically, regardless of the distance.
Also, Overwatch "cannot cause Morale checks of Pinning tests" for what it's worth.
I hope that helps!
_________________ My Painted WYSIWYG Collection Imperial Guard - 2521 Grey Knights - 1225 Space Wolves - 3058 Battlefleet Gothic- 1090
Joined: Fri Aug 31, 2012 5:30 am Posts: 2290 Location: Europe
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They still only hit on a six, so you are doubling you poor chance to hit. Though, take everything you can get!
10 shots vs 20 shots makes on avg 1 hit turn into 3 by magic. If you will get one if this 3 hits as plasma you just removed one enemy That is really good result because 1 marine is worth more than 30% of IS.