Dallas,
I think the answer lies within what you want to reload for, factory or wildcat, rifle or pistol and on and on.
Probably the best all round manual for reloading by the general public is the old Lyman manual that used actual guns and gave accuracy loads. After a few years and a few of those manuals, it is amazing to me how you can pick up a new gun, load the accuracy load for that cartridge and get results that are pretty fair. Most time the load will shoot better than the average shooter can hold to a target. The old manuals included black powder guns, shotgun, rifle, pistol, jacketed and cast bullets.
Of course, I do have my individual favorites, like the 1932 Phillip B Sharpe manual, it is a bonified classic book, much less a reloading manual. It has some real great info and pictures within its pages. Example it has a picture of the 5.56 bullet, invented by an American, patent expired, Swiss patened it again and the US Govt paid a fortune for the rights to make the Swiss penetrator bullet.
Then again, I guess if you had no other manual, the PO Ackley books would be just hard to beat. Hogdons older books are also great because they used actual guns, like the Lyman books. I have about a half dozen books made up by members of the IHMSA for heavy handgun reloading. Those books are an excellent source of information for high end hunting loads and extreame accuracy from a handgun.
Ed