How early cast-iron cannon could accelerate the sailing battle fleet

How might reliable English cast-iron cannon in 1510 have changed naval and European history?

The first proposed effect is a larger English navy and more campaigning, supported by the military advantage and export income from reliable iron cannon.

Reliable cast-iron cannon in 1510 would give the new Henry VIII an unusually powerful military and commercial resource. The proposed result is a larger navy and renewed opportunities to campaign against France. Selling guns to Dutch and German Protestant customers later in the century would also bring money into England. That export income is part of the scenario's explanation for sustained naval expansion, rather than an assumption that a new weapon alone pays for a fleet.