sometimes it just feels good rolling with that extra 2 strength.
Except when you miss because you've only got 3 BS3 shots.
Here's the mathhammer results for those that are interested. These numbers were derived using a custom simulation program I wrote. The sample size is 100,000 attack rolls, which keeps the luck variation under 1%. Simulation is more accurate than raw formulas, as I can more easily account for things like stacked weapon destroyed or immobilized results that lead to other outcomes.
3 Autocannon Sentinels vs. Chimera (Side/Rear) - AV10
Stopped Target Movement: 76% (Stunned, Immobilized, Wrecked, or Explosion)
Stopped Target Firing: 87% (Shaken, Stunned, Weapon Destoyed, Wrecked, or Explosion)
Destroyed Target: 44% (Wrecked or Explosion)
Did Nothing to Target: 9%
3 Autocannon Sentinels vs. Rhino (Front/Side) - AV11
Stopped Target Movement: 64%
Stopped Target Firing: 76%
Destroyed Target: 31%
Did Nothing to Target: 18%
3 Autocannon Sentinels vs. Chimera (Front) - AV12
Stopped Target Movement: 46%
Stopped Target Firing: 60%
Destroyed Target: 17%
Did Nothing to Target: 33%
3 Lascannon Sentinels vs. Chimera (Side/Rear) - AV10
Stopped Target Movement: 69%
Stopped Target Firing: 81%
Destroyed Target: 38%
Did Nothing to Target: 13%
3 Lascannon Sentinels vs. Rhino (Front/Side) - AV11
Stopped Target Movement: 61%
Stopped Target Firing: 73%
Destroyed Target: 31%
Did Nothing to Target: 20%
3 Lascannon Sentinels vs. Chimera (Front) - AV12
Stopped Target Movement: 50%
Stopped Target Firing: 63%
Destroyed Target: 24%
Did Nothing to Target: 30%