Show makes many incorrect assumptions based on ignorance of history, especially of firearms in the 18th century. Some of these assumptions are not important, but questioning assumptions lead to questioning results.
At the end of the show, the ballistics tests on silver bullets are seriously flawed. They use rifles in the test deciding that silver bullets are less accurate than lead. Rifling is rare in the eighteenth century which leads to results which are inaccurate. They also use modern gunpowder, much more powerful than old black powder also leading to inaccurate results. Can you trust the findings of such sloppy experiments?