Were English Culverins as effective against the Armada as they claimed?

Fascinating ballistic tests on a replica Tudor Culverin, conducted by artillery specialists from the Royal Armouries and the Mary Rose Trust, tie into the historical narrative to investigate how effective English gunners really were against the Spanish Armada in the English Channel in July of 1588.

[@dolsopolar]

seems like the doc crews aim along the barrel of the gun which was very tapered so that resulted in very low shots that ricochet off the ground over the target that's why they didn't score a single hit even at 50m even after realizing they were aiming low.