.378 Weatherby Mag Ammo for Sale

Price History
.378 Weatherby Mag
Weatherby B378270TSX Select Plus 378 Wthby Mag 270 gr Barnes TSX Lead Free 20 Bx/ 10 Cs
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$6.11/rd $122.24 Gman Sporting Arms
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $20 Limit 1
$6.58/rd $131.65 Ash Arms ★★★★★ (1)
Low cost shipping boost

.378 Weatherby Mag Ammo Price Graph

Today's .378 Weatherby Mag Ammo average is $7.40/rd, 2% above the 180-day average of $7.26/rd. Over the last 180 days, the average peaked at $7.40/rd on September 5, 2026 and bottomed at $6.77/rd on March 15, 2026.

WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 CC Fee 6% Limit 1
$6.45/rd $128.95 All Things Firearm ★★★★★ (3)
Weatherby 378 WBY Magnum 270gr TSX Rifle Ammo - 20 Rounds 747115415854
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 $5 Off - Use Code CALIBERKING
$6.46/rd $129.09 Gun Place ★★★★★ (206)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.62/rd $132.38 MCM Tactical ★★★★★ (60)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.63/rd $132.60 Redsand Tactical
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $20 Free Shipping > $1,000 Limit 1
$6.64/rd $132.82 Life2A ★★★★★ (3)
WBY AMMO 378WBY 270GR BARNES TSX 20/10
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $500 Limit 1
$6.65/rd $132.99 Cummings Family Firearms ★★★★★ (52)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.69/rd $133.85 Patriotic Firearms
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $20 Limit 1
$6.70/rd $133.90 Custom Creatives Group ★★★★★ (24)

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WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $900 CC Fee 3%
$6.70/rd $134.07 Armed in Michigan ★★★★★ (714)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.71/rd $134.11 Top Shelf Munitions ★★★★★ (2)
Weatherby .378 Weatherby Magnum 270gr Barnes TSX — 20rd Box
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.72/rd $134.37 Georgia Guns & Ammo ★★★★★ (2)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $1,250
$6.73/rd $134.49 Nadir Solutions ★★★★★ (18)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $1,000 Limit 1
$6.76/rd $135.21 Spargo Defense
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.77/rd $135.40 Vital Defense ★★★★★ (14)
Weatherby B378270TSX Select Plus 378 Wthby Mag 270 gr Barnes TSX Lead Free 20 Bx/ 10 Cs
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$6.78/rd $135.68 Gun Wise
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping Limit 1
$6.80/rd $135.90 Caliber Exchange ★★★★★ (1)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.80/rd $135.99 Big Bee Bee ★★★★★ (11)
WBY AMMO 378WBY 270GR BARNES TSX 20/10
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $1,000 CC Fee 3% Limit 1
$6.84/rd $136.69 Bunker Hill Ballistics ★★★★★ (9)
WBY AMMO 378WBY 270GR BARNES TSX 20/10
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $500
$6.84/rd $136.70 Timber Hole Outdoors ★★★★★ (5)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.85/rd $137.00 Bulletproof Outfitters ★★★★★ (133)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.90/rd $137.99 Precision Gunworks
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $500 Limit 1
$6.91/rd $138.18 Safe Haven Defense
Weatherby B378270TSX Select Plus 378 Wthby Mag 270 gr Barnes TSX Lead Free 20 Bx/ 10 Cs
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$6.95/rd $138.99 Kind Sniper ★★★★★ (61)
Weatherby B378270TSX Select Plus 378 Wthby Mag 270 gr Barnes TSX Lead Free 20 Per Box/ 10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.95/rd $139.00 Loftus Firearms ★★★★★ (13)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.95/rd $139.00 Darmok Firearms ★★★★★ (37)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $13 Free Shipping > $500 Limit 1
$6.96/rd $139.27 Axolotl Arms ★★★★★ (126)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$6.98/rd $139.61 Ecommerce Arms
Weatherby .378 Magnum Ammo 270gr TSX Ammunition - 20 Rounds
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.00/rd $139.91 Vizards Guns and Ammo ★★★★★ (1,070)
Weatherby Select Plus .378 Weatherby 270 grain TSX Lead Free (20 rd box)
Weatherby 270 Grains 20 Rounds New
Free Shipping > $500
$7.00/rd $139.99 Rivertown Munitions ★★★★★ (130)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$7.00/rd $139.99 Pathfinder Militaria ★★★★★ (106)
Weatherby B378270TSX Select Plus 378 Wthby Mag 270 gr Barnes TSX Lead Free 20 Bx/ 10 Cs
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.03/rd $140.67 De Leon RX & Sporting Goods ★★★★★ (216)
WBY AMMO 378WBY 270GR BARNES TSX 20/10
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.05/rd $140.99 2 If By Sea Tactical ★★★★★ (135)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.20/rd $144.00 The Gun Pantry ★★★★★ (192)
Weatherby 378 Weatherby Magnum Ammo 270 Grain TSX Box of 20
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.22/rd $144.42 Drifters Gear ★★★★★ (25)
WBY AMMO 378WBY 270GR BARNES TSX 20/10
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$7.22/rd $144.42 Allied Arms ★★★★★ (310)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$7.23/rd $144.62 Bayou Brass ★★★★★ (21)
Weatherby Select Plus .378 Weatherby Magnum Ammo 270gr Swift A-Frame 20 Rounds
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115452682
$7.25/rd $144.99 GunMag Warehouse ★★★★★ (71)
Weatherby Select Plus .378 Weatherby Magnum Ammo 300gr Hornady DGS 20 Rounds
Weatherby 300 Grains 20 Rounds Brass New
UPC 747115450121
$7.25/rd $144.99 GunMag Warehouse ★★★★★ (71)
Weatherby Select Plus .378 Weatherby Magnum Ammo 300gr Hornady DGXB 20 Rounds
Weatherby 300 Grains 20 Rounds Brass New
UPC 747115450114
$7.25/rd $144.99 GunMag Warehouse ★★★★★ (71)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.25/rd $144.99 WTW Arms ★★★★★ (68)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.25/rd $145.00 Echo 6 Weapons ★★★★★ (97)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$7.25/rd $145.02 The Arsenal Project ★★★★★ (16)
Weatherby 378WBY 270gr Barnes TSX - 20rd Box
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $13 Free Shipping > $350
$7.30/rd $145.90 Shadowsmith Ammo ★★★★★ (23)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$7.39/rd $147.83 Black Bayou Armory ★★★★★ (83)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $10 Free Shipping > $299 Limit 1
$7.40/rd $147.99 Canoe Creek Armory ★★★★★ (17)
WEATHERBY 378 WBY MAGNUM
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $16 Limit 1
$7.40/rd $147.99 Riflenetics ★★★★★ (65)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$7.45/rd $148.99 Mad Wolf Armory ★★★★★ (3)
Weatherby B378270TSX 378 Weatherby Magnum Barnes TSX Lead Free 270 Grain 20 Rounds
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.54/rd $150.82 Shooting Surplus ★★★★★ (193)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $18 Limit 1
$7.61/rd $152.16 Sharp's Shooting Supply ★★★★★ (34)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $19 Free Shipping > $750 Limit 1
$7.61/rd $152.16 Riddle Firearms
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$7.70/rd $154.00 Highland Arms ★★★★★ (49)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $15 Free Shipping > $500 Limit 1
$7.74/rd $154.74 Kinetic Armory ★★★★★ (3)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $25 Limit 1 $25 Off Orders Over $200 Code LOCKNLOAD25
$7.74/rd $154.82 Scottsodg.com
Weatherby Barnes TSX B378270TSX
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $15 Free Shipping > $500 Limit 1
$7.75/rd $154.99 BuyAGun ★★★★★ (3)
Weatherby 378 Wby Magnum 270 Grain Barnes TSX Ammunition 20 Rounds
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $16 Limit 1
$7.80/rd $156.03 Caliber Depot ★★★★★ (6)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $15 Free Shipping > $500
$7.85/rd $157.00 Garrison's Guns ★★★★★ (21)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$7.95/rd $158.99 Get Guns N Ammo
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$8.05/rd $161.00 Birmingham Hill Armory ★★★★★ (16)
270GR TSX 20RD 10BX/CSWEATHERBY AMMO 378 WBY MAGNUM
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $17.50 Free Shipping > $250 Limit 2
$8.10/rd $161.95 Ammunitions for Sale
Weatherby B378270TSX 378 Weatherby Magnum 270 GR Barnes TSX - 20rd Box
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Shipping $12
$8.15/rd $163.05 Classic Firearms ★★★★★ (2,454)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $700 Limit 1
$8.16/rd $163.20 Freedom Firearms ★★★★★ (2)
Weatherby Select Plus 747115415854 378 Weatherby Mag 270 Grains Lead Free
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$8.20/rd $163.99 C-ME Firearms
20rds - 378 Weatherby Mag 270 gr. Triple Shock
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$8.25/rd $164.95 Ammunition To Go ★★★★★ (27)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping Limit 1
$8.36/rd $167.12 Lightning Strike Arms ★★★★★ (32)
Wby Ammo 378WBY 270GR Barnes Tsx 20/10
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$8.36/rd $167.19 Shiner Tactical ★★★★★ (6)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$8.38/rd $167.63 Firearms Express
WEATHERBY 378 WBY MAGNUM
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$8.40/rd $167.99 Apocalypse Outfitters ★★★★★ (4)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$8.41/rd $168.24 Don's Weaponry ★★★★★ (252)
Weatherby Select Plus 378 Weatherby Magnum Ammo 270 Grain Swift A-Frame Jacketed Soft Point Box of 20
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115452682 Free Shipping
$8.45/rd $168.99 Midway USA ★★★★★ (119)
Weatherby Select Plus 378 Weatherby Magnum Ammo 300 Grain Hornady DGS (Dangerous Game Solid) Bonded Flat Nose Box of 20
Weatherby 300 Grains 20 Rounds Brass New
UPC 747115450121 Free Shipping
$8.45/rd $168.99 Midway USA ★★★★★ (119)
Weatherby Select Plus .378 Weatherby Magnum Ammo 270gr Barnes TSX 20 Rounds
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$8.50/rd $169.99 GunMag Warehouse ★★★★★ (71)
WBY AMMO 378WBY 270GR BARNES TSX 20/10
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping > $500 Limit 1
$8.70/rd $173.99 Timberlake Firearms ★★★★★ (11)
Weatherby B378270TSX Select Plus 378WthbyMag 270gr Barnes TSX Lead Free 20 Per Box/10 Case
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$9.00/rd $180.00 EK Tactical ★★★★★ (10)
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Limit 1
$9.05/rd $180.99 Coastal Firearms
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854
$9.20/rd $184.00 Third Shift
WEATHERBY AMMO 378 WBY MAGNUM - 270GR TSX 20RD 10BX/CS
Weatherby 270 Grains 20 Rounds Brass New
UPC 747115415854 Free Shipping Limit 1
$10.02/rd $200.46 Conkey's Outdoors ★★★★★ (175)

.378 Weatherby Mag Ammo Price Graph

Today's .378 Weatherby Mag Ammo average is $7.40/rd, 2% above the 180-day average of $7.26/rd. Over the last 180 days, the average peaked at $7.40/rd on September 5, 2026 and bottomed at $6.77/rd on March 15, 2026.

Daily Deals Email

Products at their 90-day low price.

Unsubscribe anytime with one click.

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