A couple of recovered bullet weights for the record.......
Mark V .460 Weatherby Magnum
400gn Barnes XFB over 110gn AR2208/VARGET for 2750fps gained 5 feet penetration into Scrub Bull retaining 293 grains. All petals lost but a mushroom still began to form on the shank. Range approx 75yds. Retained and expanded length is .680" (Bull is pictured in Barnes #4 Manual under .460 Wby Loads)
That sounds right. The copper petals of an X-bullet are tough enough to stay on until somewhat over 2500 fps. At 2700 fps they would blow off pretty surely, leaving a copper FN of sorts to penetrate deeply after shedding the drogue-parachute petals Even the GSC FN bullets (monometal copper) expanded their noses when they hit my test media at 2700 fps. Brass FN solids maintained their shape at 2800 fps, penetrated deeper.
Still have a few of those 400grainers loaded up in the .458 Winchester cases using 74gn of H 4198 and chronographing @ 2434fps.
2500 to 2600 fps is better with 400-grainers in the .458 WM+.
550gn Woodleigh Weldcore RN over 121gn IMR4831 for 2509fps into Bison and retained 458 grains and expanded to retain approx .388" shank and max expansion width of 1.155". Range approx 60yds. Bison was bled out in the field and transported back to scale a weight of 2,3XX lbs. Aged at 10.5 years.
John
That was a huge bison, and a very old one ! Where is a picture of that one, please ! Shank height of 0.388" on the Woodleigh 550-gr RNSN that started off at 1.414" length, and expansion to 250% of original diameter, and 83% weight retention: 2509 fps MV impacting at 60 yards, probably about 2375 fps, exceeded Woodleigh's recommended impact window of 1800 to 2200 fps for that bullet. Bison still died, thank goodness !
Ron aka "Rip" for Riflecrank Internationale Permanente NRA Life Benefactor and Beneficiary .458 Winchester Magnum, Magnanimous in Victory THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.
