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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 (26-inch barrel)

.270 Weatherby Magnum (26-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 3,650
Remarks: 2-3" groups
90 Sierra IMR IMR-4350 Subscribe 3,990
Remarks:
90 Sierra IMR IMR-4064 Subscribe 3,853
Remarks: accurate through cold barrel; first two shots within one inch, third normally wide of group
100 Speer IMR IMR-4350 Subscribe 3,795
Remarks: 1 1/2-inch spread
100 Speer Winchester W-780BR Subscribe 3,629
Remarks: least accurate of 6 loads tested, several 3-inch groups to its credit
100 Speer Alliant RL-21 Subscribe 3,830
Remarks:
100 Speer IMR IMR-4064 Subscribe 3,680
Remarks: 1 1/4" group
100 Speer IMR IMR-4831 Subscribe 3,625
Remarks: 2 1/2" group
110 Sierra IMR IMR-4350 Subscribe 3,663
Remarks: retains approximate accuracy of 69.0/4350/110 load with increased velocity
110 Sierra IMR IMR-4064 Subscribe 3,546
Remarks:
110 Sierra Alliant RL-21 Subscribe 3,350
Remarks: light load; gives reasonable accuracy
110 Sierra Hodgdon H-414 Subscribe 3,539
Remarks:
110 Sierra Alliant RL-21 Subscribe 3,665
Remarks:
130 Remington Bronze Point IMR IMR-4350 Subscribe 3,390
Remarks:
130 Remington Bronze Point Winchester W-780BR Subscribe 3,225
Remarks: 2 1/2" groups
130 Remington Bronze Point Winchester W-780BR Subscribe 3,270
Remarks: occasional 2" groups
130 Remington Bronze Point IMR IMR-4831 Subscribe 3,250
Remarks:
130 Remington Bronze Point IMR IMR-4831 Subscribe 3,350
Remarks: 5/8" groups
130 Remington Bronze Point Alliant RL-21 Subscribe 3,361
Remarks:
150 Hornady Spire Point Hodgdon H-870 Subscribe 3,115
Remarks:
150 Hornady Spire Point IMR IMR-4831 Subscribe 3,165
Remarks: 2" group
150 Hornady Spire Point IMR IMR-4831 Subscribe 3,231
Remarks: 2" accuracy
150 Hornady Spire Point IMR IMR-4350 Subscribe 3,215
Remarks: best long-range load for big game
150 Hornady Spire Point Winchester W-780BR Subscribe 2,967
Remarks: 2 1/2"-3" groups with most loadings of 780BR
160 Nosler IMR IMR-4350 Subscribe 3,095
Remarks: see notes
160 Nosler IMR IMR-4064 Subscribe 2,638
Remarks: see notes
160 Nosler Hodgdon H-570 Subscribe 3,164
Remarks: see notes
160 Nosler Hodgdon H-870 Subscribe 3,072
Remarks: see notes
160 Nosler Hodgdon H-870 Subscribe 3,129
Remarks: see notes
160 Nosler IMR IMR-4831 Subscribe 3,164
Remarks: see notes
170 Speer Hodgdon H-570 Subscribe 2,575
Remarks: obvious yaw on second chronograph screen
170 Speer Winchester W-780BR Subscribe 2,965
Remarks: poor shooter; extremely wide groups