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The Ultimate Reloading Manual
Wolfe Publishing Group
  • reloading manual
  • alliant reloading data
  • reloading brass
  • shotshell reloading
  • bullet reloading
The Ultimate Reloading Manual

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.270 Weatherby Magnum (24-inch barrel)

.270 Weatherby Magnum (24-inch barrel)
Warning! Notes: Most of these loads were maximum or near maximum for the rifle used, and they should be approached with caution when tried in other rifles chambered for the .270 Weatherby Magnum cartridge. All loads used the Federal 215 Magnum primer. All 160-grain Noslers keyholed when fired through 1-in-12 twist barrel of the Weatherby rifle. A 1-in-10 twist is needed to stabilize this bullet. (Rifle Issue #8, March, 1970)
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
90 Sierra Winchester W-780BR Subscribe 3,600
Remarks: 2-3" groups
90 Sierra IMR IMR-4350 Subscribe 3,900
Remarks: 1 3/4" group
100 Speer IMR IMR-4350 Subscribe 3,735
Remarks: 1 1/2-inch spread
100 Speer Winchester W-780BR Subscribe 3,669
Remarks: least accurate of 6 loads tested, several 3-inch groups to its credit
100 Speer Alliant RL-21 Subscribe 3,780
Remarks:
110 Sierra Winchester W-780BR Subscribe 3,539
Remarks: 1 1/4" groups; first 2 shots normally within 3/4"
110 Sierra IMR IMR-4350 Subscribe 3,270
Remarks: consistently throws 1" groups
110 Sierra IMR IMR-4350 Subscribe 3,642
Remarks: retains approximate accuracy of 69.0/4350/110 load with increased velocity
110 Sierra IMR IMR-4064 Subscribe 3,514
Remarks:
110 Sierra IMR IMR-4831 Subscribe 3,475
Remarks:
110 Sierra Alliant RL-21 Subscribe 3,649
Remarks:
130 Remington Bronze Point IMR IMR-4350 Subscribe 3,300
Remarks: 1" groups
130 Remington Bronze Point IMR IMR-4350 Subscribe 3,350
Remarks: 1 5/8" groups
130 Remington Bronze Point IMR IMR-4831 Subscribe 3,333
Remarks: 2" groups
130 Remington Bronze Point Hodgdon H-570 Subscribe 3,200
Remarks: 2" groups
130 Remington Bronze Point Alliant RL-21 Subscribe 3,327
Remarks:
150 Hornady Spire Point Hodgdon H-870 Subscribe 3,160
Remarks:
150 Hornady Spire Point Hodgdon H-570 Subscribe 3,076
Remarks: 2" group
150 Hornady Spire Point IMR IMR-4831 Subscribe 3,110
Remarks: 3" group
150 Hornady Spire Point IMR IMR-4831 Subscribe 3,189
Remarks: 2" accuracy
150 Hornady Spire Point IMR IMR-4350 Subscribe 3,194
Remarks: 1"-1 1/2" groups; best long-range load for big game
150 Hornady Spire Point Winchester W-780BR Subscribe 3,081
Remarks: 2 1/2"-3" groups with most loadings of 780BR
150 Hornady Spire Point Winchester W-780BR Subscribe 3,105
Remarks:
150 Hornady Spire Point Alliant RL-21 Subscribe 3,115
Remarks:
160 Nosler IMR IMR-4350 Subscribe 3,072
Remarks: see notes
160 Nosler IMR IMR-4064 Subscribe 2,545
Remarks: see notes
160 Nosler Hodgdon H-570 Subscribe 2,829
Remarks: see notes
160 Nosler Hodgdon H-570 Subscribe 3,072
Remarks: see notes
160 Nosler Hodgdon H-870 Subscribe 2,970
Remarks: see notes
160 Nosler Winchester W-780BR Subscribe 2,624
Remarks: see notes
160 Nosler Winchester W-780BR Subscribe 2,980
Remarks: see notes
160 Nosler IMR IMR-4831 Subscribe 3,030
Remarks: see notes
160 Nosler IMR IMR-4831 Subscribe 3,085
Remarks: see notes
170 Speer IMR IMR-4831 Subscribe 2,700
Remarks: 3-4" groups
170 Speer Hodgdon H-870 Subscribe 2,800
Remarks:
170 Speer Hodgdon H-570 Subscribe 2,425
Remarks:
170 Speer Hodgdon H-570 Subscribe 2,525
Remarks: obvious yaw on second chronograph screen
170 Speer IMR IMR-4350 Subscribe 2,928
Remarks: 4" groups minimum
170 Speer IMR IMR-4064 Subscribe 2,500
Remarks: best load found for this bullet; consistent 2" groups; good for 100-yard shots and brush hunting
170 Speer Alliant RL-21 Subscribe 2,300
Remarks: bullet yaw on second chronograph screen
170 Speer Alliant RL-21 Subscribe 2,870
Remarks: