I don't hand load but used the Woodleigh hydro solids on my elephant and as follow up on a buffalo in Zimbabwe last Nov.
I am also a Hornady fan (that has not been a popular thing on AH) but also really like the Federal Premium line as well as Remington Premium ammo.
I don't buy the whole one bullet for everything sales pitch... Broadside on a buffalo your going to get not just a pass through but a "blow right through!" with these things, and probably any good solid moving at a respectable speed... The exception "may" be on an old time cartridge like they talk about in that video... Moving at 1800 FPS. Which is risky at best on Cape buffalo or elephant.
I used them in a 416 Rem Mag M70 and on elephant it went in one ear and out the other. LOL. I don't know if there was a miscommunication between me and the PH, but I understood he wanted me to shoot right at the bottom back of the earhole and that is where the bullet entered, and came out the other side about 2" farther back... There was a neat little exit hole not unlike the entrance... Not a ragged hole like the video claims but if you know how an elephant skull is constructed, you can understand how that might make sense.
There might be something to the hydrostatic shock thing as it missed the brain, but there was neat grove cut in the spine where it attaches to the skull and the elephant dropped instantly.... However I followed up with two more shots, the first I did not have a good aiming point as he was down in tall grass, it went in the top of the neck and passed through the lungs and heart to lodge in the sternum, we think. There was no exit hole but never found the bullet... If you ever experience the ensuing frenzy of a village cutting the meat off an elephant, you will understand how we never found it! That whole chest cavity was tore up pretty good so definitely could see how it performed like they claimed in the video there! I then moved up and put another in the top of the head and that bullet was recovered out of a jaw bone. It had a small dent on the leading edge. These hydro solids would be my first choice on elephant and probably my first choice as a solid... Odd they don't talk about the plastic cap on them that helps them feed well?
I think I only put one solid into my Zimbabwe buffalo two days after the elephant... And that critter had 6 bullets in him, probably did not need the last two but hey, it's a buffalo and it was still breathing! There was an exit hole out the left flank that had entered somewhere in the front end of the right side... But with all the holes in him, hard to say just which one was the hydro solid.... I would suggest a TSX as a top choice for buffalo, followed by something like a Trophy Bonded Bear Claw or A Frame.... and just fill the magazine with them if it is a gun sending them at 2300 FPS or more. Too many opportunities to pass through and hit another critter with solids in a modern caliber. But if you really insist on a solid, the Woodleigh hydro is a great one! However I claim BS on the one bullet does all, except maybe at 1800 fps.