Low Tech cannons mortars and shells

[Polydamas]

Originally Posted by Pursuivant

By the 18th century, they were sufficiently reliable and effective that they were part of every artilleryman's arsenal.

I don't think that the average three- or four-pounder-crew or naval gun crew had explosive shells in the 18th century (which GURPS calls TL 5). Instead, a well-equipped European artillery park would have some weapons with explosive shells.

As late as the Napoleonic Wars, Wikipedia suggests that the only French field guns with a shell were the 6" howitzers https://en.wikipedia.org/wiki/Obusie...ces_Gribeauval https://en.wikipedia.org/wiki/Gribeauval_system (they also had mortars for sieges)