Hodgdon offers a free, web-based Reloading Data Center where you can look up load data by selecting your cartridge and/or powder. The interface lets you filter results by format (rifle, pistol, shotshell, muzzleloader), and view starting hodgdon powder load data and maximum loads, velocities, chamber pressures, and more—often with key notes like compressed loads or subsonic loads.
Additionally, Hodgdon's website provides downloadable Reference Data—including burn rates, bushing charts, glossary, and specialized load data such as "H4895 Reduced Rifle Loads" or "Hodgdon Extreme Rifle Powders.