My old boss said to always use a post driver for chain link, but a job in Spokane proved him wrong.
We were setting posts in really rocky ground, and the driver kept bouncing off and damaging the tops. After wrecking three posts, the site foreman told me to just dig and set them in concrete. It took a bit longer, but every post was perfectly straight and solid. Has anyone else run into soil where the usual method just doesn't work?