The fluff for the iATM system suggest that the rounds used for the iATM system are simply the standard ATM rounds (not counting the IMP and IIW rounds). However, they've got a different BV, and they're listed differently on the Osteon variant that mounts them.
So...are those rounds (Standard, ER, HE) for the iATM exactly the same as the ATM rounds? Do they have the same cost in terms of c-bills? Are they still Tournament Legal rounds, or are they considered Experimental like the Launcher?
What exactly are the differences?
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And how do you handle BV for the IIW rounds? A multiplier of 1.3 leads to alot of non-integers.
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