Short answer: YES.
Explanation: Firearms technology isn't one of those maybe-maybe-maybe things. It's a matter of When and not If. And we've seen so far that while magic is a thing here, most of their fighting is done the good old fashioned way: with swords and wooden shields.
And so this would be the crux of the matter: when some other country gets the jump on you and invades you with musketeer corps, do you wanna be fighting them with swords and shields? Or do you wanna be fighting them with the lever-action rifles you cooked up in secret?
(Also, before anyone says anything, Puyol strikes me as a reasonable enough person to keep that as a break-glass-incase-of-emergency thing. He is his own sort of statesman, understanding the importance of warfare - that it must be waged strictly as needed, not even as a fait accompli - and that senseless conquest and subjugation just leads to bigger problems later on down the line. We've already seen this where he corrected one of his subordinates about an officer's responsibility for the actions of his men, meaning that he knows full-well that a person's actions has consequences.)
Zenjirou is not a warmonger, in fact, most people are not. Let's say you bring gunpowder into this world and you see your creation being used to slaughter thousands, how would that make you feel?
Also, you wouldn't cook lever actions in secret, those require way more industrial capabilities than any kingdom so far has shown.
I guess warfare will be like the late medieval weapons with swords still being a thing but guns are like extra fancy premium bows that pack more oomph. Let's hope that Zenjirou knows about this thing called rifling.
Firearms have existed since 10th century in China. In the 14th and 15th centuries, small portable cannons were common, they didn't have rifling. In fact, rifling is a relatively recent development in the history of firearms.
@NotSomeone
@kikix12
Gun powder is dead simple to make from relitively common ingredients.
And it's not like the reaction can't be mimicked in half a dozen ways with magic. So it's something that only becomes relevant if the transmigrator lacks magical ability and needs to fight or if the natives have cooked up gunpowder of their own.
Now that MC has become aware of the issue, he can work to mitigate the excesses of firearms and artillery.
Gunpowder probably wasn't created in the South because people down there can blow each other up with magic if they wanted.
The North is said to be technologically advanced, while the South relies on Magic for most stuff.
Gunpowder could be a recent discovery in the Northern continent, the fact that the Princess's ship doesn't have cannons is indicative. My guess is that the Church in the North is working on things like gunpowder precisely to invade the South without getting ratio'd by magic.