Powder Miner was concerned that having a hybrid armoury of railguns and gunpowder could get messy, that our attention would get split, or more likely that we'd simply not do much with gunpowder. Thus, a version of the whalelock that phases out gunpowder weaponry:
Whalelock Rifle (supplant gunpowder edition)
Zappo-Tech. This is the name given to the many cetricity-utilising devices that were created by early-modern Twelve-Bay scientists.
For many, the biggest Zappo-Tech breakthrough was the Whalelock Rifle. Though termed a rifle at the time, due to its accuracy, it would later be referred to as a railgun. Two rails (made from treated whalebone) propelled an iron projectile to considerable speeds- greatly exceeding that of a musket-ball. Power was provided by a canister of Ichor. Though it could be carried by a single soldier, it was quite bulky, therefore was typically mounted on a bipod when in use.
Though contemporaneous with early gunpowder weaponry, it initially had its own niche- too expensive (and bulky) to arm every soldier with, but more accurate at long range. It is worth noting that, while impressive at the time, the first Whalelocks were very primitive, and 'more accurate at long range' meant 'could conceivably hit a target at 400 meters'.
Thus, armies of the Twelve Bay Republican Theocracy dabbled in gunpowder-armed troops, the technology having been introduced from abroad. However, as time went on and the Whalelock became more compact, muskets began to get phased out. Come the age of pike-and-shot, the 'shot' was almost éxclusively Whalelocks.
[See Whalelock Rifle for lore]