X-Com: Gray Dawn Burst Fire
Burst Fire
Some weapons, notably automatic weapons, will have a "burst fire" mode in addition to their fully automatic mode. This is done in an attempt to increase the chances of scoring a hit by placing more rounds in the vicinity of the target while restricting sustained fire that would accomplish little more than throwing off (and subsequently conserving ammo).
Using burst fire adds +3 to the attack roll in lieu of a weapon's WA bonus (if any). Burst fire cannot be used with a targeted shot.
*NOTE: This rule is currently under review and may be subject to change.
Instead of 1d6/2 to determine number of hits, roll 1d6. 1-3=1 hit, 4-5=2 hits and 6=3 hits.
When burst fire is used for covering fire, it is slightly less efficient in terms of shots fired/suppression points to target. But, since the shots from each burst will be more tightly grouped, each burst will cause the target to make a defense roll.