DICE Developer @Demize99 stated on twitter that they are currently testing a new multiplayer damage model that would increase damage by 25% on all weapons except the sniper rifles and vehicle splash damage.  He also stated that the test was going well and that it should be approved for a retail patch very soon.  Below are the official tweets of @Demize99

Tue-23 Feb 03:35:

@Demize99: Tested a slightly higher damage model in an internal MP test yesterday. Worked out nicely A couple more tests and it will go live for retail

Tue- Feb 23 07:04:

@Demize99: So the test was to increase AR SMG LMG Pistol and SemiAuto rifles/slugs by 25% vs the torso. Splash vehicles and snipe dmg stay the same.

UPDATE:

Tue- Feb 23 10:50:

@Demize99: For the record 25% is 1 bullet for most guns, depending on the rof. Slow firing guns get less benefit, just due to the maths.



Source: http://badcompanytwo.com/news-tidbits/dice-increasing-weapon-damage-under-testing-phase/