I realize exactly how hard lead is. That kind of goes with casting your own bullets, which I do. It's called a soft metal for a reason. And the muzzle velocity of your typical musket is also quite low- it's in the velocity range of typical modern low-to-midpower handgun bullets, not even reaching magnum levels much less rifle.
Primitive lead bullets could indeed penetrate primitive iron armor. Now look, in-game, at the protection level of iron armor then work your way up through Dwemer, Ebony, Daedric...how do they look to compare?
Good advice there. You should take it.
Yeah congrats on smelting your own lead. You must be a real patriot.
Anyway, a lead ball IS very hard. It could easily penetrate the typical high-carbon steel of the medieval era due to the mass of the bullet. Even if lead is (relatively) soft it must to travel thru a thin layer of armour.
The muzzle velocity of a musket is low compared to a modern day weapon? Wow.
Anyways, point was, that muskets are FAR more effective than bows at piercing armour. This is a documented fact. Musketry was one of the prime reasons that warfare left the medieval era, with cheap infantry replacing heavily armoured knights as the backbone of armies.
Besides, muskets would obviously vary in quality. Maybe some top-notch muskets with top notch ammo would be able to compete with daedric bows with deadric arrows?