Well, to be fair it was only chambered in one rifle. And while it was Savage’s Big-Dog for a spell, that was soon ended. Below is a great article on the 303. Even has some quite STOUT reloading info. They are showing a 190gr @ over 2200fps through the model 99’s 26” barrel.

https://www.handloadermagazine.com/3...ition%20in%20.