well, outside of a FULL Fushion blast in your face, the level differences are noticeable. So there is truth that Fusion rifles are probably your problem. With the impact and the amount of shots that come out of it, it's difficult not to get one shotted. But, that still requires the person charging it, and having good aim to unload the full blast on you. Maybe you're not as good as you think and you're not moving around enough against Fusions, or the other person is just really good at aiming, or luck, or a mix of everything. One reason or another you took the full blast. 30 or not, you're gonna be toast.