You misunderstand. I'm not saying I am shooting 1 shot then waiting for it to fill. I fire one shot, and am at 5. I line up another shot and fire, being at 4, but then the regen kicks in and I'm back at 5. Continue until you either just die or get a considerable amount of shots off before it actually runs out. And as for Atheon, tell that to the teammates I had as I destroyed him because since I actually take the time to aim for his weak spot, my ammo was regenerating during the whole thing. I wouldn't blow my entire clip in the first 2 seconds or something, because with a sniper, you do have to aim, which allows the regen to kick in. Also, I don't have to use ammo synth's when all the green ammo is at the feet of the big bad guy, so I don't have to pause in a fire fight, and I don't have to risk my neck for ammo. Sure, DPS is typically better, but what about when you run out entirely, while the Ice Breaker can keep going?