Originally Posted by Riflecrank
OK, with the rarity of 3000-pound bison bulls, only 1.0 H&H unit of TBPI is required for the "Ultimate Buffalo Rifle."
That will take care of about any critter up to 2500 pounds on the hoof.

Sir Jerry is onto a good load with his 450-gr TSX at 2418 fps with 83 grains of AA-2460.
Ditto Sir Bob with his 450-gr TSX at 2413 fps load with 84 grains of H335.
Both of those are from 24" barrels, corrected to MV by adding 11 fps to 5-yard chrono velocity, IIRC.

Previous top 450-grainer load from my Ruger No. 1 .458 WM with 24" barrel:
450-gr TSX, Hornady .458 WM brass, F-215 primer, COL 3.565", 87*F
83.0 grains AA-2230
3 shots, 5-yard Caldwell G2 chrono fps: 2493, 2495, 2492
Average = 2493 fps, so for BC = 0.369:
MV = 2504 fps

First 2 shots went into one hole at 50 yards and I pulled the third shot by a half inch,
or that is when my forend screw started bending and loosening. Ho hum. Fixed that.

TBIP if 450-gr TSX MV is only 2500 fps:

0 yards = 1.877
50 yards = 1.790
100 yards = 1.705
200 yards = 1.543
300 yards = 1.390
400 yards = 1.247
500 yards = 1.125
600 yards = 1.003

Better not shoot any 3000-pound bison bulls past 400 yards.
That is about the limit of my marksmanship on caribou anyway, with a .340 WbyMag, which is a puny cartridge compared to the .458 WM+.


Good stuff, Sir Ron,

In about a week I'll be taking off for a few days "Down East", so will miss some blog writing until I get back. Then I'll be checking in here again!

With our Federal Election tomorrow, followed by getting matters ready for the trip... well you know how that goes!

Bob
www.bigbores.ca

"What shall it profit a man if he gain the whole world and lose his own soul" - Jesus