Nice! They do look like cannon fuses! As subterranean said though they could be blasting caps. I am not to familiar with modern explosives. If they are cannon though ROCK ON!
Note the pinched-flat end on them. Actual military-issue cannon primers didn't have that form. They are either blasting-caps or modern Reproduction primers for civil war batle re-enactors (see photo of Repro ones below). The location of the find, "Stone Quarry Road," indicates they are blasting-caps.