What your seeing is the 12.7mm Breda HEI Rounds Hitting the Target, those are the Flashes, so of which are very large. The Target plane is the P40.
Weapons like the Breda That fired Chemical engery rounds as aposed to the 50cal which was mostly a Kenitic engery weapon all suffer from a serious range effects penatility in lethality in AH. All rounds in AH lose their "punch" with range howeaver rounds with a chemical enegery componet should not realy depecerate in the efect at range given they still have suficient enegery on impact to detenonate, this is not realy modeled in AH insomuch as I understand it. Whear we realy see this being an issue is with
those particularly low velocity weapons with very short effective ranges.So withen normal combat ranges in AH we are faced with what are aparently very weak gun's, this is most aparent with the MG FF/Type 99's, and to a lesser degeree with the above weapon and others of a similar nature.
If you advance it one frame at time it looks real cool, you see the impact points fairly clearly, at least untill He realy starts hitting then the target is particialy obscured from the smoke form the impacts.