Buy .30-378 Ammo for Sale
(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 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
(0)
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
(8)
Nosler Trophy Grade 30-378 Weatherby Mag 210 grain AccuBond Long Range Rifle Ammo, 20/Box - 60133
Brand:
Nosler
Bullet Type:
ACCUBOND LONG RANGE
Caliber:
.30-378 WBY MAG
Grains:
210 grain
Rounds:
20
From:
$94.56
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11
(0)
HORNADY Precision Hunter 30-378 Weatherby Magnum 220Gr ELD-X 20Rd Box Ammo (82214)
Brand:
Hornady
Bullet Type:
ELD-X
Caliber:
.30-378 WBY MAG
Capacity:
20
Finish Per Color:
Brass
Grains:
220 grain
From:
$46.29
View Product
15
(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)
HSM Trophy Gold 185 gr MHVLD .30-378 Weatherby Mag Ammo, 20/box - BER-30378185VLD
Brand:
HSM Ammunition
Bullet Type:
Berger Hunting VLD Match
Caliber:
.30-378 WBY MAG
Grains:
185 grain
Rounds:
20
(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
(0)
Norma Ammo .30-378 Wby Mag - 165gr. Oryx 20-pack
Brand:
Norma
Caliber:
.30-378 WBY MAG
Rounds:
20
(0)
HSM Trophy Gold 210 gr MHVLD .30-378 Weatherby Mag Ammo, 20/box - BER-30378210VLD
Brand:
HSM Ammunition
Bullet Type:
Berger Hunting VLD Match
Caliber:
.30-378 WBY MAG
Grains:
210 grain
Rounds:
20
(0)
HORNADY Custom 30-378 Weatherby Magnum 180Gr GMX 20Rd Box Ammo (82210)
Brand:
Hornady
Bullet Type:
GMX - Expanding
Caliber:
.30-378 WBY MAG
Grains:
180 grain
Rounds:
20
(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 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 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
Marketplace Insights
★ 4.8/5
based on 21 customer reviews across 14 variants from 22 retailers
Premium ammunition with outstanding accuracy and proven hunting effectiveness across multiple calibers and extreme distances.
What customers like
Exceptional Accuracy76%
all 3 bullet holes were touching each other @100 yards
Long Range Performance67%
nothing compares to the .30-.378 on hunts that I expect longer shots
Hunting Effectiveness67%
I've never shot at an animal that that didn't come home with me
One-Shot Kills43%
hit him right in the bread basket
Common concerns
Quality Control Issues5%
3.07 inch - 4 shot group at 200 yards
Frequently Asked Questions
Buy .30-378 Ammo for Sale
What is a 30-378 Weatherby used for?
The .30-378 Weatherby Magnum is used for hunting large game like elk at extended ranges, often beyond 500 yards, and for long-range precision shooting. Its extremely high velocity and flat trajectory make it effective in open terrain such as mountains where long shots are common.
What is the ballistics of a 30-378 Weatherby mag?
Factory loads typically drive 180-grain bullets at around 3,400 fps, generating roughly 4,600 ft-lbs of muzzle energy. It shoots exceptionally flat, dropping about 6 inches at 400 yards when zeroed at 300 yards, making it effective on large game at extended ranges.
How long will a 30-378 barrel last?
Accuracy life typically runs 500 to 1,000 rounds if you keep the barrel cool. Firing 50 fast shots can ruin the barrel outright. Absolute life extends further, but practical longevity depends on your accuracy standards and shooting discipline. Avoid excessive powder charges and let the barrel cool between shots.
What is the difference between 30-378 WBY and 300 WBY?
The .30-378 Weatherby Magnum has roughly 25% greater powder capacity than the .300 Weatherby Magnum, producing higher velocity, flatter trajectories, and more downrange energy. It also generates more recoil and barrel wear. The .300 WBY is a more practical choice for most hunters while still delivering exceptional performance.
How much recoil does a 30-378 Weatherby have?
Measured free recoil energy runs approximately 46 ft-lbs in a typical 8.5-lb rifle. Felt recoil depends on rifle weight, stock design, and muzzle brake use. Comparing it to a .270 Winchester is misleading—most shooters find it significantly heavier and demanding of proper technique.