I know it can be done, there were none in year one. So uhhhhhh, let's hear the true opinion of the destiny community.
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There are no ghost bullets. It is worse than that. They brought back Bloom from Halo: Reach. The bullets pick a path within a cone around where you are aiming. The worse the range, the larger the cone, and the higher chance you have to not hit what you are directly aiming at.