I’m of a similar mind set as you Toby. I’ve played with a number of powders and bullets in my .458 WM and have found AA2230 and Reloader 10x to be stellar performers.
I have a custom DWM Mauser with a 20” barrel topped with a ghost ring rear and bead front sights and a Mannlicher stock, built and owned by the late? (not sure if he is still with us), great Jerry Kuhnhausen. I picked it up for $600 from his estate sale along with 4 other firearms, including a ZKK 602 in .375 H&H and an 1886 12 ga underlever SxS.
Even with only 20 inches of barrel I have been able to get 2240 fps with a 500 gr Woodleigh and AA2230. Definitely a max load, but I wanted to see what velocity could be achieved with this powder/bullet combination and here is where I think some folks go wrong. Trying to hot rod the load trying to get too much out of it. This is a pretty heavily compressed load with a ball powder and it is most definitely temperature sensitive. Not a good recipe for DG where temps may be... warm
However, back this off a few grains and it is pretty mild, no longer compressed and produces a respectable 2100 fps. I’ve purposely done some shooting with my load in temps approaching 100 degrees and had no visible increase in pressure signs and only a slight increase in velocity. Even letting a round bake in the chamber with the rifle sitting in the sun has not produced excessive pressure with this load. I can only conclude that this would be Africa-safe.
Even so, I prefer the RL-10x in my rifle. I have loaded it with the 500 gr Woodleighs as well as 450 gr CEB Brass Solids. I load 69.5 gr of RL-10x and the 450 gr CEB which yields 2300 fps and consistently under 20 fps Standard Deviation and shoots better than I can with open sights. This by no means a maximum load.
Based on reports I’ve heard about Woodleighs recently I’ll probably go back to the drawing board and work up a load for 500 gr A-Frames. Pretty sure 2100 fps will be very achievable at a well below max load of 10x.
I believe the folks who have had bad experiences with the .458 WM. I would not place my trust in factory loads. I might also treat some folks hand loads with some skepticism
With a moderate load of the right powder pushing a 500 gr A-Frame at 2100 fps I think the .458 WM is a perfectly acceptable choice for Cape Buffalo. First choice or best choice? No. I think I would prefer my .416 Rigby, but that doesn’t mean the Win Mag isn’t up to the task.
By the same token I think a 450 CEB Solid at 2300 fps should be acceptable for a brain shot on all but the biggest bull elephant. Still, I think I would prefer a 400 gr CEB Solid at 2450 fps from the Rigby.
Guess we just need to go shoot a bunch of buff and ele with the old .458’s and report back on the results
Pretty sure
@Bullthrower338 will join in. He’s got like 6 of the damn things!
Of course he believes in having a six pack of everything...