
Apparently, bullet storm stacks with two shot
I have got bullet storm since this minigun became my main daily weapon and found out that after shooting 90 bullets, I had got 6 units instead of the three I thought I would get, so it doesn't count the expenditure but the actual bullets the gun fires.
Maybe it's dumb for many, but I literally just discovered this and figured I'd mention it for anyone who is as oblivious to this as I was, I think my beloved is going to be even more fun now.
For anyone curious, the abilities are two shot, explosive and durability. It may be a little cliché, but I've been having an unreasonable amount of fun blasting things with my minigun and T-60.