I’m a visual learner. Seeing the size differences between rifle cartridges has helped me keep them somewhat straight in my mind (at least the ones I commonly use). The following chart shows the sizes of familiar (and not-so-familiar) rifle calibers and cartridges.
Rifle Caliber/Cartridge Chart
The team at http://Ammo.com has created this chart to help you visualize rifle cartridge sizes relative to rounds you’re already familiar with. For an in-depth look at common cartridge ballistics, don’t miss all of our ballistics tables. If you’re more concerned with how much each cartridge kicks, we also have you covered with our recoil charts.
Handgun and shotgun rounds are covered separately in our ammo size chart, and if you are matching a cartridge to an animal rather than to a rifle, our hunting caliber chart sorts the options by game.
See the full Rifle Caliber/Cartridge Chart here ➔ https://ammo.com/bullet-type/rifle-cartridge-chart