You see, googlefrog, those were my swifts, and after 6 years of gameplay I am confident that my swift always suck. I have lost almost every single swift mirror battle. I failed to kill almost every bomber. Such is the whim of the spring gods, and even you are not one to challenge them.

In all seriousness, I recall missing with my boost such that only 3 swifts got to shoot

The rightmost Swift in this image has fired its missile. The triplet on the left only shoots guns, because their colvols are overlapping, so they avoid friendly fire. The ones on the left are outside of the missile range.

Root cause: Swift has an oversized colvol.