How accurate is Radiometric Dating?

[Mister Agenda]

So how come they were wrong about the pyramids?

You didn't last very long.

As far as the pyramids go, since the margin of error on C14 dating is 2-5% and the pyramids are thousands of years old, being off by a few hundred years isn't that significant, so it's not that big of a deal if C14 dating of pieces of wood from the pyramid were dated 374 years older than the historical age of the pyramid. Not to mention several possible confounding factors.