Even then, if we assume a 100% hit rate combined with a 100% pen rate, it'll take the Puma six hits to destroy the M36, which will take around 23 seconds. Meanwhile the M36 can 2-shot the puma - meaning a single hit forces a retreat.
As I've heard this now twice in this thread:
I'm fairly sure that the Puma has 400 HP and can therefore take 3 shots (or 2 plus snare) from a Jackson.
I also think that the most likely scenario is that the Jackson already gets hit once by a ATG or other tank and that you dive and sacrifice a Puma for it. Then it would be 3 shots for the Jackson and 4 for the Puma.
I'm not 100% sure on exact reloading times since the Jackson also has wind up etc, will do a short test and report back.