A contractor grade cord (12ga) will drop a tad over 5 volts 100 feet
out with a 13a load, what a good chain saw might draw.
That is less than the recommended max V/D.
Here's an online calculator I thought you might want to play with. Your
stated drop is a little more than this calculator says.
--
"I predict future happiness for Americans if they can prevent the
government from wasting the labors of the people under the pretense of
taking care of them".
Thomas Jefferson