grand veneur
AH elite
I have never used a formula for selecting a cartridge. I base it on the size of the game I want to shoot and the distance at which I perhaps have to do it. The caliber that I regularly use also plays a role. I have shot many of various game species with cartridges caliber 9,3mm, but all of them were much smaller than an elephant. For this reason, I would newer have considered using the cartridge 9,3x74R for shooting an elephant which is, as I also knew before I saw one in the wild, much bigger than a wild boar or a deer.