How much practice with broadheads?

[C.W. Richter]

I don't know who has been helping you with your setup, but at face value I question a lot of it. It sounds exactly like the advice you'd find at a typical bow shop in America with "speed kills". My opinions run 180 degrees the opposite direction of American bow shops. Other than vanes or glue, there is not one thing in a large US bowshop I own or would want to own for Africa use.

My son has your same draw length, a bit less draw weight. He was shooting I think 585 grains and 30% FOC, we used about every trick in the book. The most important is the finest cut on contact broadhead (single bevel) money can buy, sharpened beyond sharp, and an insert/outsert system of the very most durable quality.

If you'd like to watch videos of similar setups to yours in action, watch the Driess Vissers plains game bowhunting videos. I don't think you're going to get the penetration and pass throughs you'd hope for with your setup.

I'm not trying to freak you out or cast shade, I just think you've got a speed bow setup and its the polar opposite of what I know will work well in Africa.

There are rules pertaining to min. energy of bows (esp. on DG which I'm assuming you're NOT hunting,) but 70ish energy is probably a better goal! African game are much more toughly-constructed than a deer at home (even a gazelle is harder to kill than a typical deer!) They're evolutionarily constructed to withstand predator attacks (including low KE arrow/broadhead combos!) You have 32 days to up your game! Uncertain what you're hunting. My late teen son shot a pile of oryx (350-450 lbs) on down using a 750 gr setup and 70 lb. Chuck Adams (read his books!) would say that you're shooting pingpong balls instead of spears!

 

[rookhawk]

My late teen son shot a pile of oryx (350-450 lbs) on down using a 750 gr setup and 70 lb.

Your son got one other benefit with his 750gr setup. They've proven statistically that around 650gr and up there is a "bone breaking threshold" where the propensity for a properly constructed arrow is likely to break a bone rather than bounce off or lodge in it. At 750gr versus absolutely equal energy / KE of a much faster FPS but lighter arrow, your son's setup is far more likely to break a bone and cause a lethal shot.