Seismic charge ammo adds a bit of extra gameplay for me. I have 3 launchers on my T-10, at my current skill level I'll deplete a single launcher in order to fill up a 400 tonne capacity freighter.
So what's your average? I've blown them with as little as 3. I think I usually crack them with 4 unless I screw up... Usually no more than 5 on a metallic roid.
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