The bolter would have a hard time destroying a Rhino without getting a rear shot, nevermind a chimera. And even if they do get a rear shot on one of those vehicles, it probably won't destroy it anyway. Marines may be agile, but they're not that much moreso than other veterans experienced in close combat (Cain himself was able to actually outmaneuver a Khornate Champion, who is far more capable in close combat than your average Marine-- Cain is an accomplished individual, but he's still merely human without even any augmetics aside from replaced fingers). And let's face it, they're big targets regardless of their agility. Marines are huge. Seven to eight feet tall or taller, with extremely wide shoulders that are made even wider by ridiculous shoulderpads, and so on and so forth.
You assume that I care.You, by default, dont get to participate in this discussion