[Dezion]

Personally, I believe that scoring two balls in autonomous will be unlikely for the majority of the competition season. It will more than likely not occur for the first few weeks and may become rare later.

One, you would somehow have to have a robot to retrieve the ball from the Midline without incurring a G13 infraction. This is possible to do, however extremely unlikely. After you score the first boulder, you will have to traverse a defense for the second time, which increases your chances of not lining up for the ball properly. (This will depend on your sensors for getting the ball.)

Two, consider other robots in autonomous. Your robot would have to avoid colliding with other robots, which would ruin both your autos. How do you plan on preventing his? (At least in Quals, I see preventing it very difficult; in Elims it could be possible do to better strategy and general better robots.)

Third, for a team considering picking up a boulder that an alliance member dropped, how do you plan on coordinating this? The alliance partner would have drop it roughly in the same spot, and it's possible that the boulder will roll away from the intended area. As well, it's possible that they may collide. (Possible in Elims, however I see it as very unlikely.)

tl;dr Shooting two (or even more) boulders will be very unlikely, and difficult, however possible and the best teams will be able to surpass the challenge.