I'm working on a spreadsheet that calculates a weapons stats for Destiny including the mods and perks that alter them. This allows end-users to find which perks would give them the build they're looking for instead of using the inaccurate bar graphs given in game. It's fairly user-friendly, utilizing drop-down menus to navigate from weapon class and rarity to weapon name, and all the applicable perks the weapon could drop with. I've got the data and the formulas all down, however, I'd like to fact check the numbers on these stats. Some of the weapons have different stats depending on the site I find them on. (For instance destinydb.com, planetdestiny.com, and destinytracker.com all have different stats for the rare auto rifle Cassiopeia.) What is the approved method to determine a weapons stats such as impact or range? The question also applies to perk stats that alter the weapon stats- Hammer Forged, for instance.