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The best-kept secret of Team Prime is the bonkers good aim Bulkhead has.
The reason it doesn't come up much is because a) he's primarily a close-quarters fighter packing enough firepower that just hitting in the vicinity of where you aimed is enough and b) his poor reflexes -- the actual reason he's so accident-prone -- end up playing a much larger role in battle situations.
But in the event that he gets to show off, his throwing aim (and as a corollary, his ability to catch stuff thrown his way) is pretty much pinpoint accurate. The reason for it is that as a construction worker, he has a sensory array that prioritises the kind of spatial information required for three-dimensional reasoning -- normally used for figuring out the stress profiles of different structures, but also highly useful for working out trajectories. He also has better fine motor control than he ever gets credit for -- not graceful on the level of, say, Optimus, but way less clumsy than anyone thinks.
More self-indulgently, the mechanical basis for it is that Bulkhead's sensory systems experience significant overlap in the radio-IR spectrum and while the internal resolution/focus speed of his optics might not be any better than anyone elses, the range of radiation and the resolution of the spectrum he can perceive is much higher.
He and Ratchet are also the only two in Team Prime who have native UV/near-UV vision, and Bulkhead has the highest colour/brightness distinction out of all of them. After all, it would be advantageous for a constructor to see/sense what parts of a building are likely to form radio wave "noise traps", and have access to IR and even x-ray vision -- although "seeing" in x-ray (or more accurately, shifting his range of vision into the x-ray spectrum) and "seeing" in radio wave is disorienting enough that Bulkhead rarely uses them outside of when they're absolutely needed.
(This is also one of those headcanons I will smugly point the canon support out for. Bulkhead having Anti-Stormtrooper Aim is legit a consistent aspect of his characterisation, although in TFA his spatial awareness isn't nearly as good as it is in Prime.)