What level crew are you using? That matters quite a bit. Taking a look now, regular crew seems to hit about one in every 2-4 shots, depending on whether the Lasher variant has augmented engines or not. The Heavy Blaster isn't a great weapon for the Wolf - the flux requirements are rather too high (and the efficiency too low). In any case, not a bug - also, it doesn't generalize to all projectile-style weapons - for example, it'll do much better with a pulse laser, because the effect of a few misses isn't so high, and it has more time to get a good bead on the target. It's just a case of the Heavy Blaster not being an optimal weapon choice here, especially in the hands of inexperienced crew.