Lots of good questions. First thing is to go over to afrucanhunting.com and join. A number of members here are also members there. Then start reading. Look at hunt reports. That will give you a good idea of how different outfitters hunt. Decide which country that you want to hunt. To a degree...
I've fortunate enough to of been over 9 times. First trip was a Tika T-3 in a .300 WSM. Then several trips with a 7mm Mag. last 4 or so (except the Congo) I have used my 7 SAUM. 50-60 animals? 7 mag I was using 160 gr AB's. Did a good job. No complaints.
The SAUM uses 180 gr Berger VLD's at...
https://www.hunttalk.com/threads/wyoming-antelope-unit-17.277479/
The link above is from a few years ago. What you need to know is the winter kill was significant in 22-23. This winter has been favorable. I live in Gillette. South of town I'm still seeing reasonable numbers. West of town on I-90...
There is a fairly significant thread over on Africahunting.com about the company and how they do business. A bit polarizing would be how I would characterize it. My impression is for a first time african hunter they are OK. If you know what to expect then they are somewhat lacking. Use the...
https://texashuntingforum.com/forum/ubbthreads.php/forums/9/1/exotic-hunting
This is the Texas hunting forum and specifically the exotics section. Go through there for a couple of hours and you'll see some hunt reports and hunts offered.
Bruce
I'd suggest talking to Mulie Mike. He seems to have a decent number of happy clients. Here's a link to his web site.
https://www.westtexashunt.com/
He posts a lot over on the Texas hunting forum.
Bruce
I'm using 61.7 grains. That bullet at that speed seems to be a sweet spot as far as performance on animals. I've had several African PH's ask what bullet I was using. My kills have been from 50 yds to 611. Been a great combo for me.
Buce
I’ve got a 6.5 SS which is quite similar to your PRC. I have a 24 inch barrel and get 3000 fps using the 156’s and RL 26. Out of the powders you listed I’d try the H-1000 first. The others may be too slow and run out of case space before you get the velocity you want. I could be wrong tho.
Bruce
I run the 180 VLD in my 7 SAUM. I’m at 2900 fps and it’s a killing machine. I think close to 50 animals including 3 eland. Sub 1/2 inch when I do my part. 3 or 4 trips to Africa plus use here in Wy. Deadly combo for me. Never tried the 175’s so I can’t comment on them.