My friend and test partner Sam Rose in NC were doing a tremendous amount of load data and bullet tech with 500 NE in 2012 and 2013. At the time we had developed the standard 570 CEB Solid, and matching Raptor at 535 gr. We were not only doing load data, but pressure data as well. We were also prepping for a buffalo shoot in Australia with our friend/guide Paul Truccolo. Sam knew very well the huge successes I had with 500 MDM and lighter for caliber Raptors and Solids, so a few weeks before leaving for Australia Sam had Dan at CEB do a 510 gr Solid and matching 475 Raptor. Bullets arrived without a lot of time to do load data, so they were loaded with just a tad more powder than the standard weights of 570/535 and we were off....................
In my 500 MDM Winchester M70s at .500 caliber I used a 450 Raptor at over 2400 fps, and it was deadly devastating on buffalo, the most devastating trauma inflicting bullet I had ever used, and I have used them all, Woodliegh, Swift, Barnes, and more........... Nothing and I mean nothing I had ever seen was more devastating on animal tissue than a Raptor. No conventional premium bullet can inflict the trauma that a Raptor inflicts, and no conventional bullet can come close to the penetration of the remaining solid bullet after blade shear. This goes for all calibers, not just big bores and buffalo.
On the buffalo shoot Sam was only running the 475 Raptor at around 2200 fps. He shot several buffalo with the 535 Raptors at 2150 fps or so, and several with the 475 Raptors at 2200 fps. Both were devastating, with both buffalo just stood, quivered, and went down. Almost none took more than one or two steps, or simply turned and fell. The 475 Raptors gave better penetration than the 535s, we recovered a few 535s at the lower velocity, but recovered none of the 475 bases. Now, I have to say that there were some instances that the 535 bases had more travel, at more severe angles and this contributed to finding a few. One thing that was noticeable in animal reactions, the 475 hit harder with its small amount of added velocity. Sam had added Talon Tips to the 475s so to make sure he could distinguish between the two bullets, this also added 125-150 fps impact velocity at 50 yards over an un-tipped bullet. This had a tremendous effect on impact velocity.
The 510 Solid was used several times, incredible penetration with it as expected, none recovered.
Now, back to the Lab and doing data and pressure data............... We like to keep Double Rifles at less than 45000 PSI. We do not exceed that pressure. We tested a few different powders, I even did some blended loads blending IMR 8208 with RL 15. The RL 15 loads came out on top with the 510 Solids up to 2306 fps at 43400 PSI and the 475 Raptors at 2312 fps at 39200 PSI with the exact same load. Yes, these regulated in 3 different 500 NE rifles, hole for hole....... Later the same load in a new Heym Sam bought gave 2452 fps with no pressure signs at all. Pressures were not tested in the Heym. There have been many folks using the 510 Solids on elephant with extreme success, and the same loads we tested here. 475 Raptors have become more popular than the heavier Raptors. The added velocity of the 475 Raptor is absolutely devastating.
Raptors are the most wicked tissue destroying bullet that you can use, period. Following very closely by the Generation 1 CNC bullets, such as Hammer, CEB Maximus and copper Lehighs. No Conventional Expanding bullet can do the damage and the amount of penetration that either of these type bullets can produce, not even close.
I do not shoot double rifles and I do not care for them personally. I am a Winchester M70 Fan for the field. But I also love Ruger #1s, and recently came across a Ruger #1 in 50/90, which for all intensive purposes is a 2.5 inch 500 NE........... I quickly developed loads for this gun using 510 Solids and 475 Raptors....... Running the 510 Solids at 2180 to 2200 fps and the 475 Raptor to 2267 fps, I could go more, but I don't really want to......... LOL............
The photos show my 50/90 loaded with 475 Raptors with Talon Tip added................
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I can promise you this much, if you use the 475 Raptor, put the bullet in the front end of a buffalo, you hunt will be over quickly and decisively.