So how advanced does the technology of a weapon have to be to enable a rate of fire of 10 rounds per minute?
I have a muzzle-loading rifle, and, if I really hustle, I can get off two rounds per minute. However, there are muzzle-loading firearms that are capable of firing 10 rounds per minute. Consider the Colt Model 1851 Navy Revolver.
It was probably the most common revolver used during the Civil War. It takes a long time to load the six-round cylinder, but the cylinder is easily removed and replaced. It was not uncommon for soldiers to carry spare loaded cylinders. It’s possible to fire three cylinders (18 rounds) in under a minute.
However, there are even older weapons capable of firing 10 rounds per minute. Consider the weapon shown at the left. Henry V was able to use massed fire from such weapons to devastate an attack by a force that greatly outnumbered his happy few, his band of brothers, at Agincourt.
There are other, even simpler, weapons that can deliver a high rate of fire. David only took five stones when he fought Goliath. He was a good shot and only needed one to kill the giant, but an expert with a sling can get off 10 shots in a minute.
A sling is a stone age weapon.