Well I guess if we are going with heavy rounds.
147gr. HST 9mm CZ SP-01 19+1 = 2940gr
If you're going to go with 'heavy' rounds, I suggest you get serious about it!
Hornady 240 grain .454 Casull at 1,900 fps, generating 1,923 ft-lbs x 6 = 11,538 ft-lbs.
Works while camping, hiking, and back-packing!