I still have a Speer and Lyman manual I bought in the '70's. Today I use the internet to compare various resources for a given cartridge, print what I want and put them in a cartridge / rifle specific folder. I use that as a general reference as I tweak everything from powder type, charge, primer, bullet and seating depth and case manufacturer. This allows quick reference when I load for specific cartridge for a specific rifle, I still have the tactile component of have something in my hand, don't have to rely on an internet connection and I'm not spending money on a large number of cartridges that I don't shoot and have no interest in. With that said, a good manual would be nice to compare future cartridge decisions i. e. I want to build a 7mm rifle and I'm vacillating between 280 AI and 7mm PRC with 160 class bullets. I have considered the 7mm SAW which sends this class of bullet at the velocity range I want (2900ish). I have a fast twist barrel, short and long action donors and good stocks for each. I would have to buy a magnum bolt so I'm leaning more toward the 280 or SAW. Sorry, I got off track.