I thought I'd told you about that?
They worked quite well, cranked up to around 2600 fps. I had a bit of a bullet test going on the cull with my standard 2350 fps 450 grain A-Frame load as a base-line for comparison and the light TSXs as a low recoil option, and 420 grain CEB Safari Raptors and some 500 grain Partition, and both Barnes and Woodleigh Hydrostatic solids.
In a general sort of way, the A-Frames were the best at all distances, the CEBs quite good at the shorter distances but lame at longer ranges as they slow down something fierce. The light little TSXs didn't quite have the smack of the heavier bullets at the typical short range, but out-did the CEBs at longer ranges because they had some speed left. The Raptors teetered on pathetic around 200 yards. Penetration was nearly identical with all of them, mostly because the hide on the far side of thick skinned buff is a great equalizer. Good softs almost always make it that far, and almost never go right through. The CEBs always shed their 6 petals as designed, the A-Frames always looked like an advertisement picture no matter the range or shot placement, and the TSXs opened progressively less as the distance increased until they looked like jagged solids, which when you think about it is what they are. The solids aren't worth a pinch of coon-####, just like always. I'd brain cripples with those to save the good stuff. Somehow, the Noslers never got much play. In the weird way things have of happening the bush would go sleep when I had them in the mag and woke up when I changed them. I'm not normally a superstitious person, but sometimes you can't fight it.
If a guy only shot one or two buffalo, and at only close range he could be forgiven if he thought there wasn't much difference between any of them. That stands to reason, since they are all some of the best buffalo softs ever made. As the numbers piled up, the patterns became quite established and predictable though. I had higher hopes for the CEBs, but although they worked they didn't excel the way the hype had been built up. Tipping them will raise downrange velocities considerably if you have the mag room. I came home quite happy with my old favorites and pleasantly surprised by how well the little 350s actually did work with recoil that approximated a .375 with 300s. I wouldn't hestitate using the .458 with 350s to fill the slot usually filled by the .375 just by an ammo swap. That leaves some options for bringing a .300 or similar for a little gun on a two gun safari. In an unrelated matter I'm working with light .375s to crowd into .300 trajectory now. Never happy to leave well enough alone I guess.