We switched to the power auger as a last resort, but even that didn't totally solve our problems.
"Holy hell, making a fence is a lot of work! I helped my husband make some post holes last weekend with an auger. We dug about six holes by hand, starting with a post-digger but we have hard pan, rocky, clay soil and it’s very hard to dig. We switched to the power auger as a last resort, but even that didn't totally solve our problems. The auger left me bruised, sore, and humiliated."