Even if you don't reload, a good reloading manual contains a lot of valuable information. You might try the Speer #13. The manuals don't address specific guns but they are a wealth of information on different calibers. Knowledge of ammunition and performance may help you determine what guns to buy or not to buy. For each rifle or pistol cartridge, Speer has a page of info that includes intended purpose, limitations, history, and performance. Money well spent.