30-378 Weatherby Ammo
Updated · 15 products · 10 in stock · prices refreshed daily
(6)
Weatherby Select Plus 30-378 Weatherby Mag 180 grain Barnes TTSX Rifle Ammo, 20/Box - B303180TTSX
Brand:
Weatherby
Bullet Type:
Barnes Tipped Triple Shock
Caliber:
.30-378 WBY MAG
Capacity:
20
Grains:
180 grain
Rounds:
20
(0)
Weatherby Select Plus Brass .30-378 195-Grain 20-Rounds HC
Brand:
Weatherby
Bullet Type:
Hammer Custom
Caliber:
.30-378 WBY MAG
Capacity:
20
Finish Per Color:
Brass
Grains:
195 grain
(0)
Weatherby Select Plus 220 gr Hornady ELD-X .30-378 Weatherby Mag Ammo - H303220ELDX
Brand:
Weatherby
Bullet Type:
Hornady ELD-X
Caliber:
.30-378 WBY MAG
Capacity:
20
Finish Per Color:
Brass
Grains:
220 grain
From:
$99.92
17
(0)
Weatherby Select Plus Rifle Ammunition 30-378 Wby Mag 180 GR Scirocco 3500 Fps 20/Ct F303180SCO 747115452019
Brand:
Weatherby
Caliber:
.30-378 WBY MAG
Rounds:
20
(0)
WEATHERBY BRASS .30-378 WEATHERBY 20RD MAGNUM MAG UNPRIMED
Brand:
Weatherby
Caliber:
.30-378 WBY MAG
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Weatherby Select 180 gr 30-378 Weatherby Mag Ammo, 20/box - H303180IL
Brand:
Weatherby
Bullet Type:
Hornady Interlock
Caliber:
.30-378 WBY MAG
Capacity:
20
Grains:
180 grain
Rounds:
20
From:
$82.11
16
(0)
WEATHERBY .30-378 Weatherby Magnum Unprimed Brass Cases (BRASS303)
Brand:
Weatherby
Caliber:
.30-378 WBY MAG
(0)
Weatherby Select Plus 180 gr Nosler Ballistic Tip .30-378 Weatherby Mag Ammo, 20/box - N303180BST
Brand:
Weatherby
Bullet Type:
Ballistic Tip
Caliber:
.30-378 WBY MAG
Grains:
180 grain
Rounds:
20
(0)
Weatherby Select Plus, Wthby N303200acb 30-378wby 200 Accubond 20/10
Brand:
Weatherby
Bullet Type:
AccuBond
Caliber:
.30-378 WBY MAG
Capacity:
20
Finish Per Color:
Brass
Grains:
200 grain
(1)
Weatherby Select Plus 30-378 Weatherby Mag 165 grain Barnes TTSX Rifle Ammo, 20/Box - B303165TTSX
Brand:
Weatherby
Bullet Type:
Barnes Tipped TSX Lead Free
Caliber:
.30-378 WBY MAG
Finish Per Color:
Brass
Grains:
165 grain
Rounds:
20
(6)
Weatherby Select Plus 30-378 Weatherby Mag 180 grain AccuBond Rifle Ammo, 20/Box - N303180ACB
Brand:
Weatherby
Bullet Type:
Nosler AccuBond
Caliber:
.30-378 WBY MAG
Capacity:
20
Finish Per Color:
Brass
Grains:
180 grain
(0)
Weatherby Select Plus 200 gr Nosler Partition .30-378 Weatherby Mag Ammo, 20/box - N303200PT
Brand:
Weatherby
Bullet Type:
Partition
Caliber:
.30-378 WBY MAG
Grains:
200 grain
Rounds:
20
(0)
Weatherby Select Plus 165 gr Barnes TSXLF .30-378 Weatherby Mag Ammo - B303165TSX
Brand:
Weatherby
Bullet Type:
Barnes Triple Shock X
Caliber:
.30-378 WBY MAG
Grains:
165 grain
Rounds:
20
(0)
Weatherby Ammo 30-378Wby 180Gr Barnes Tsx 747115417766 -
Brand:
Weatherby
Caliber:
.30-378 WBY MAG
Rounds:
20
(0)
Weatherby Ammo .30-378 MAG 165Gr. Nosler B-Tip 2 747115025756
Brand:
Weatherby
Caliber:
.30-378 WBY MAG
Rounds:
20
Marketplace Insights
★ 4.8/5
based on 21 customer reviews across 15 products from 26 retailers
Overwhelmingly praised precision long-range hunting rifle with exceptional accuracy, devastating stopping power, and manageable recoil that consistently delivers one-shot kills at extreme distances.
What customers like
Long-range hunting capability57%
I've taken whitetail, mule deer, elk and moose with 180 gr Accubond from 15yds ( moose) to 1013 yds elk.
Exceptional accuracy48%
Regularly get 1/2" groups with premium ammo. Best group was 1/4".
Reliable one-shot kills33%
whitetail hunted with it and shot deer 400 yds plus with the 165 gr ballistic tip and they hit the ground where they stand
Manageable recoil with muzzle brake29%
Recoil of a 243 or less. If you are thinking of getting one, the choice is yours.
Premium build quality24%
The fit and finish is perfect, as you would expect from a $3,000 rifle.
Frequently Asked Questions
30-378 Weatherby Ammo
What is a 30-378 Weatherby used for?
The .30-378 Weatherby Magnum is used for long-range hunting of elk and other large game, and for 1,000-yard precision shooting competition. Its high velocity and flat trajectory make it effective at extended distances, often beyond 500 yards.
How much recoil does a 30-378 Weatherby have?
The .30-378 Weatherby Magnum generates approximately 45–46 foot-pounds of free recoil energy, making it one of the hardest-kicking 30-caliber cartridges. A muzzle brake can cut felt recoil by 40–50%. Heavier rifles also reduce perceived recoil noticeably.
What is the effective range of a 30-378 Weatherby?
The .30-378 Weatherby Magnum can reach targets accurately at 1,000–1,400 yards under ideal conditions. Most hunters consider 1,000 yards the practical limit for ethical kills on large game. Actual effective range depends on bullet weight, barrel condition, and shooter skill.
What is the difference between 30-378 Weatherby and 300 Rum?
The .30-378 Weatherby holds more powder than the .300 RUM, producing higher velocities with equal bullet weights. The .300 RUM uses a beltless rebated-rim design; the .30-378 uses a belted case. The .30-378 is faster but burns barrels quicker and brass costs more.
How fast is a 30 378 Weatherby?
Factory loads push 180-grain bullets around 3,400 fps, with 165-grain loads reaching approximately 3,500 fps and 200-grain loads around 3,160 fps. Handloaders typically achieve 3,450–3,500 fps with 180-grain projectiles from a 26-inch barrel. Velocity varies by bullet weight, powder charge, and barrel length.
Who makes a 30-378 rifle?
Weatherby manufactures the .30-378 Weatherby Magnum rifle, primarily in their Mark V platform. Popular variants include the Mark V Accumark and Apex. Multiple configurations are available through various retailers, with prices typically ranging from $98 to $3,174 depending on model and features.
How much is 30-378 ammo?
30-378 Weatherby Magnum ammo ranges from roughly $80 to $140 per box of 20 rounds. Factory ammunition from Weatherby, Hornady, and others is available through multiple retailers, with price varying by bullet weight, manufacturer, and load type.
What is the difference between 30-378 WBY and 300 WBY?
.30-378 Weatherby Magnum holds roughly 25 percent more powder than .300 Weatherby Magnum, generating higher velocities and flatter trajectories at extended ranges. Trade-offs include greater recoil, faster barrel wear, and higher ammunition costs. Choose the .30-378 for maximum long-range performance; the .300 WBY offers a more manageable alternative.
What is the difference between 30-378 Weatherby Magnum and 338 Lapua?
.30-378 Weatherby holds more powder, generating higher velocities with .30 caliber bullets but causes faster barrel wear. .338 Lapua uses a rebated rim case, offers better case life and feeds more reliably. Lapua dominates long-range precision shooting; Weatherby suits hunters wanting flat trajectories at extreme ranges.
