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.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: