Normal people just pick the gun and cartridge that suits the needs .
Abnormal ones ask 'how hot can I load it ?'
Abnormal ones use the heaviest recoil ones to 'prove they're a man'
Use a cartridge that you can fire a significant rounds in a day without pain or developing a flinch, or becoming sore.
When I was shooting metallic silhouette matches I could do that with my just under max loads .Those who tried to use hotter loads always realized that what they gained in knockdown power they lost in accuracy.
Know you limits a practice often.