I was very dissapointed to learn Clay Harvey was a thief and a phony. His book, Popular Sporting Rifle Cartridges, was my resource bible when I was in high school. I can't tell you how many times I read the book, cover to cover. I really enjoyed the stories and info. After learning of his shenanigans recently, I pitched his book in the trash.
I have Clay Harvey's book "Popular Sporting Rifle Cartridges" and have found it to be pretty interesting,, but I haven't tried his loads. Generally, I stick to pressuure tested loads in reloading manuals.
