AmmunitionCartridges

.338-378 Wby. Mag.

Another Weatherby® wildcat, first introduced in the 1960s. This is the ultimate cartridge for long-range, big game hunting. Delivers more than 5,000 foot-pounds of energy at the muzzle with a .338-sized bullet. Extremely powerful and flat shooting. Based upon the .378 case, necked down to .338. Reintroduced as a Weatherby® production cartridge in 1998.

.338-378 Weatherby® Magnum is available in Mark V® models: Accumark and Accumark RC.

20 cartridges per box.

This product is not eligible for overnight or 2-day shipping.

$159.00

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CaliberWeight GrainsBullet TypeSuggested UsageB/CPrice 
.338-378 Wby.200AccubondMB.414$159.00
.338-378 Wby.225Barnes TSXMB.482$159.00
.338-378 Wby.250PartitionMB.473$159.00

USAGE: V - Varmint; M - Medium Game (Deer, Sheep, Pronghorn, Black Bear); B - Big Game (Elk, Moose, Grizzly); A - African Big Game (Elephant, Cape Buffalo, Rhino, Lion)
BULLET TYPE: SP - Spire Point; Rn-EX - Round Nose-Expanding; FMJ - Full Metal Jacket; Barnes TSX - Barnes® TSX™; Barnes TTSX - Barnes® TTSX™; Partition - Nosler® Partition® Flat Base; BST - Nosler® Ballistic Tip®; Accubond - Nosler® Accubond®; Spitzer - Norma® Spitzer

Ballistics Specs PDF

Trajectory Comparison

.338-378 Wby.
Bullet B/C Path of Bullet
(Above or below line-of-sight of rifle scopes mounted 1.5" above bore)
Wt. Grains Bullet Type 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
200 Accubond .414 2.69 3.42 0.00 -8.31 -22.40
225 Barnes TSX .482 3.10 3.80 0.00 -8.90 -24.00
250 Partition .473 3.50 4.20 0.00 -9.80 -26.40
.338-378 Wby.
Bullet B/C Path of Bullet
(Above or below line-of-sight of rifle scopes mounted 1.5" above bore)
Wt. Grains Bullet Type 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
200 Accubond .414 2.69 3.42 0.00 -8.31 -22.40
225 Barnes TSX .482 3.10 3.80 0.00 -8.90 -24.00
250 Partition .473 3.50 4.20 0.00 -9.80 -26.40

Energy Comparison

.338-378 Wby.
Bullet B/C Energy (Foot-Pounds)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
200 Accubond .414 5075 4351 3720 3166 2681 2256
225 Barnes TSX .482 5052 4420 3856 3353 2902 2501
250 Partition .473 5197 4528 3933 3401 2927 2507
.338-378 Wby.
Bullet B/C Energy (Foot-Pounds)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
200 Accubond .414 5075 4351 3720 3166 2681 2256
225 Barnes TSX .482 5052 4420 3856 3353 2902 2501
250 Partition .473 5197 4528 3933 3401 2927 2507

Velocity Comparison

.338-378 Wby.
Bullet B/C Velocity (Feet per Second)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
200 Accubond .414 3380 3130 2894 2670 2457 2254
225 Barnes TSX .482 3180 2974 2778 2591 2410 2238
250 Partition .473 3060 2856 2662 2475 2297 2125
.338-378 Wby.
Bullet B/C Velocity (Feet per Second)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
200 Accubond .414 3380 3130 2894 2670 2457 2254
225 Barnes TSX .482 3180 2974 2778 2591 2410 2238
250 Partition .473 3060 2856 2662 2475 2297 2125

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