The NPR News podcast and video Beto O'Rourke Wants To Ban, Confiscate Some Guns. Texas Voters Want Details (about 6.5 minutes long) contains the following assertion by Congressman O'Rourke:
In under three minutes, in a Walmart in El Paso Texas, 22 people were killed.
When the second amendment was adopted and ratified, it took three minutes to reload your musket.
Question: Did it in fact take something like three minutes to reload muskets when the Second Amendment to the US Constitution was ratified? Is a "three minute musket" representative of the best military individual firearm of the day for warfare?