Hello Matt !
Welcome to AH , friend you are planning a Safari in the best hunting grounds of the world , hunting the big 3 , just do not cost cut on the ammo the DANGEROUS GAME XPANDING (DGX) & DANGEROUS GAME SOLID (DGS) by Hornady are perfect for African Hunting xpanding for Buff , leopard and solids for elephant, use the best to take the trophies which many just dream of. Are you using .375 H&H Mag. ??? if so then the ballistic details of 300 grains DGS by HORNADY is depicted below :
Test Barrel (24") Velocity (fps) / Energy (ft-lbs)
Muzzle 100 200 300 400 500
2530/4263 2223/3292 1938/2503 1678/1875 1448/1396 1256/1050
Trajectory (inches)
Muzzle 100 200 300 400 500
1.50 2.80 0.00 -12.10 -36.70 -77.90
Features:
Copper clad steel-jacketed DGS and DGX bullets provide industry leading performance under all conditions!
DGS (Dangerous Game Solid) bullet features a blunt nose profile and a super tough alloy core to penetrate deeply through hide, muscle and bone.
DGX (Dangerous Game eXpanding) bullet expands up to 1.25 times the original diameter, and its tough alloy core resists deformation at all velocities.
Hope this might help.
Monish