In 2013 I hunted with one of my 18 inch 458 B&Ms in Zimbabwe. I had 3 bullets shooting to the same or very close to same POI at 50 yards. One of those bullets was at the time the new 250 Socom from Cutting Edge. In the 458 B&M it was running at or around 2950 fps. It was a hammer on Zebra, wildebeest, oryx, hartebeest, of which I shot several of these size animals, and every single one was bang/flop DRT. Also, no bullets recovered, all exits.
We had spent a week in South Africa on the plains game, and then moved on to Zimbabwe for a couple more weeks. I ended up using the 250 Socom on a good size croc, neck shot, DRT. I tried it on a cow buffalo, behind the shoulder shot, recovered the base on the far side under the hide. One day we are walking along Lake Kariba about 30 yards off the shore line, looking for any croc's that might be laying about. The 458 was loaded with the 250 Socom for this mission, backed by 450 gr CEB Solids. As we are moving slowly along, there was a big sleeping bull hippo to our right at 15 yards! We ended up in between him and the water, never a really good spot to be in. He sensed something, but did not see or smell us, but none the less stood up to have a look. He was a huge bull, I moved very slowly around a bush to get a better view. There was no chance of changing ammo, we were just way too close and he was already on alert. I had a good shot right between the eyes and took it with the 250 Socom at 2950 fps! It was bang and flop and end of story. However I paid the insurance with one of the solids through the shoulder regardless. It was totally devastating, brain matter had squirted out both ear holes for over 6 feet on both sides. Skull was cracked, and in the end we found the base of the bullet about 8 inches behind the skull. It was wicked.
If you are looking for something that will absolutely be a hammer in your 458s for anything short of buffalo and of course the heavies, hippo and elephant, this 250 Socom is the ticket. I had a good friend use his 458 B&M with the 250 Socom on a very large bull moose a few years ago at over 200 yards. The moose dropped in his tracks on the spot. No bullet recovered. This is not your typical light weight deer bullet, it can handle way more than that with ease.............
I was also very lucky in this rifle, the 250 Socom at 2950 fps matched well with the 450 Solids at 2200 fps and the 420 Raptors at 2300 fps. Making this 458 extremely versatile.............