Despite my best attempts to locate an answer to the following questions I have been unable to. So please bear with me if this has been asked before.
I recently started a new Rogue Trader game and one of my players is a dual-bolt-pistol-wielding Arch-Militant. She has a BS of 57, Weapon Master (Pistol), and Ambidextrous. She also aims to get the Two-Weapon Wielder talent at rank 2. They have begun to use burst-fire attacks and after reading the Two-Weapon Wielder talent, the burst fire actions, and the Two-Weapon Fighting section more than once my understanding is still fuzzy as to how these talents and action all interact.
I'm confused by the descriptions of Two-Weapon Wielder, Semi-auto Burst, and Two-Weapon Fighting. Two-Weapon Wielder states: "When armed with two weapons of the same type, he may spend a Full Action to attack with both [weapons]. Both tests made to attack with the weapons suffer a -20 penalty...." Meanwhile, Semi-auto Burst states: "If the character has a pistol in each hand, both capable of semi-automatic fire, he may fire both with this action...." In addition the Two-Weapon Fighting section makes no mention of whether or not Two-Weapon Wielder would be required to fire two bolt pistols in a semi-auto burst.
My questions are,
1. Is Two-Weapon Wielder required to fire two bolt pistols semi-auto at the same time?
2. If Two-Weapon Wielder is not required, what benefits does it garner as burst fire is generally considered to be better than single shots?
3. When firing two bolt pistols semi-auto, would our Arch-Militant make one BS test for both pistols, or one test for each?
4. If only one test is required, how do degrees of success interact as she is firing two pistols? Semi-Auto Burst grants 1 extra hit for each 2 degrees of success. Does this mean that she would need to get 6 degrees of success in order to hit with all 4 rounds fired?
Thanks for your help!