North Fork 400 grain, .458 cal bullets.
The two on the left are not modified, the two on the right have their noses milled off a bit, resulting weight is 383 grains.
See how thick the jacket is? These bullets are tougher than boiled owl poop. They are actually too tough for the average size African undulate and any lion and apparently tend to penetrate right through, so North Fork modified this excellent bullet to expand more/easier for plains game and Lion, They called it the Lion Load.
Being designed to work at the highest .458 velocities I am confident that this modified bullet will be "good to go" in my 45-70 running at about 2,000 fps.
Also, check out the fine driving bands. Brian
View attachment 675135
Brian........ North Fork has been my favorite Premium Expanding for some time now, they are superb in all ways, for premium expanding.
Some years ago I did a few tests with the 350 North Forks, designed primarily for 45/70........at different velocities.
And the 400 North Forks at a bit more velocity.............
As a "Rule of Thumb", in my test medium, I like to see a minimum of 18 inches total penetration for Buffalo...... With your modified 400 NF at roughly 380 gr, and 2000 fps, you should be at that bottom side penetration. This will mean on Broadside shots, you will catch the bullet in the hide far side. You might not have a lot of wiggle room for more angled shots or heavy bone, so make that first one count, and followup with a good solid (CEB or North Fork) ..........
You also might consider the 350 North Fork Expanding CPS designed for 45/70...... that would give you a bit more wiggle room, or maybe try it on the second buffalo..... HEH........
I wanted a .500 cal so that I could use a bullet from the CEB .500S&W selection of bullets. This was all about an upcoming cape buffalo hunt and I selected a .410 grain .500 cal CEB Safari Raptor pistol bullet.
Readers please note that this load with a .410 CEB Raptor bullet running at just 1,920 fps.,
Each buffalo took two or three staggering steps when hit by the .500 cal CEB Raptor bullet and unceremoniously flopped to the ground and died. Both PH's watched in amazement as though they had just witnessed a train wreck
Let me inject just a bit of a correction please Brian, not much of one, small correction, the 410 Raptor is not a "Pistol Bullet" at all, as you know, All the B&M Series 500 caliber cartridges, are true .500 caliber. Of which I worked with CEB and North Fork extensively to design a complete series of .500 caliber bullets to work with all the various cartridges, which there are 6 different .500 caliber cartridges, designed for various rifles and actions. I designed the 450 CEB Solid and 410 Raptor for the 50 B&M, a 2.25 inch RUM case, based on a Winchester M70 WSM action, 18 inch barrels. After we learned so much about what these Raptors and Solids can do at lighter weights, I wanted a matching pair of CEBs that were some lighter, and run more velocity in the 2.25 inch case. Both of these have .600 Nose projections, which is way way too long for handguns. The 2.25 inch 50 B&M can run the 410 Raptors to 2375 fps in the 18 inch guns and the 450 Solids to 2346 fps and are absolute hammers on buffalo......
I used this bullet in the 500 B&M as well, this is a 2.5 inch RUM case, and it is based on the Winchester M70 Long action, I can use Talon Tips with the Raptors, and work through the magazine of the longer action. The 2.5 inch version is a personal cartridge of mine, not really part of the B&M Lineup, there are only two rifles built, I have both. It is a bit more capable, and it comes with an 18 inch barrel as well. It runs the 410 Raptors a tad over 2500 fps and the 450 Solids at 2440 fps. I slammed a buffalo point of shoulder left, bullet found at around 4 ft of total penetration, even after busting bone, and destroyed literally everything in between. The buffalo could only turn enough to show me the right shoulder, and I plowed a 450 Solid through it. End of story, almost......... I shot through a 12 inch + diameter tree with the 450 Solid before it hit the buffalo in the shoulder, and it still exited dead straight the other side of the buffalo as well........