Q: Can a formation that have a mixture of AP and AT shots fire the AP shots at a formation in which all its infantry is in transports, so that any infantry, whose transport is destroyed and survives, can be shot at?

A: No. They must be an eligible target at the beginning of the shooting action, although according to section 2.2.6 AP and AT hits are allocated first and saves made before MW.

This means you could shoot up a bunch of transport vehicles, and then have MW hits allocated to any infantry that survive (this doesn’t apply in the experimental hit allocation rules).

Allocating Hits: If an attacking formation scores hits both with normal weapons and weapons with the macro-weapon ability, then the opposing player must allocate and make any saves for the normal hits first, and then allocate and make any saves for the macro-weapon hits. Hits from macro-weapons can only be applied to units that are in a position to be hit by a macro-weapon.

but I'm leaning towards just removing that FAQ all together and not allowing MW hits to be applied to units that weren't there when firing. It's cleaner, and it prevents the defender from gaming where the MW hits will go (MW hit on a fully loaded transport or some schmoe that just bailed out...).

If an attacking formation scores hits both with normal weapons and weapons with the macro-weapon ability, then the opposing player must allocate and make any saves for the normal hits first, and then allocate and make any saves for the macro-weapon hits. Hits from macro-weapons can only be applied to units that are in a position to be hit by a macro-weapon (Note: With the exception of War Engines (see 3.3.2), during an assault, all units up to 15cm away are valid targets for allocation, regardless of whether the hits are from CC or FF).
(My emphasis)

Hmm, in essence we are querying the relative timing of the allocation of MW hits and the resolution of the effects from earlier hits. I think we need to recognise that the same issue applies to assaults, so the FAQ needs to reflect this rather than only applying to shooting.

The key section of the rules is in 1.9.6

The 'separate' MW allocation round is all part of the same round of hit allocation so the argument is that MW hits should not apply to the transported infantry that have bailed out of the destroyed vehicle because they were not in a position to be hit by the MW (since they were inside their vehicle) - in effect, the vehicle armour saves them from the effects of the MW hit . . . . .

Doesn't that go against the principle of MW hits on vehicles, where transported troops use their own armour save against the MW hit (and most die as a result)? After all, if the vehicle had survived the AT hit both it and the troops inside would have been incinerated by the MW hit!

With respect, I would suggest that the MW hit *should* be applied to one of the surviving infantry. This simulates the vehicle being knocked out and the surviving infantry succumbing to the almost simultaneous MW attack.

(Note the question of the infantry bailing out 'into cover' is IMHO a "red herring"; it only applies to the firer shooting at a target, not to the effects of that shooting.)