AmmunitionCartridges

.30-378 Wby. Mag.

Initially a wildcat cartridge developed by Roy Weatherby in 1959 at the request of the United States Army. This white-hot cartridge is based on the .378 necked down to .30 caliber and packed with powder. Originally billed as the world’s fastest .30 caliber cartridge, it will push a .30 caliber bullet more than 3,500 feet per second. Reintroduced as a Weatherby® production cartridge in 1996.

.30-378 Weatherby® Magnum is available in Mark V® models: Accumark (RH and LH), Accumark RC, and Fibermark Composite.

20 cartridges per box.

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

$146.00

* We're sorry. The Weatherby Store is temporarily closed for maintenance and updates. To place an order, please call Customer Support at 805-227-2600.

Watch for upcoming details on a new and improved Weatherby.com and thanks for your continued support of Weatherby!

CaliberWeight GrainsBullet TypeSuggested UsageB/CPrice 
.30-378 Wby.130Barnes TTSXM.350$159.00
.30-378 Wby.165Barnes TSXMB.398$159.00
.30-378 Wby.165BSTM.475$146.00
.30-378 Wby.180BSTM.507$146.00
.30-378 Wby.180AccubondM.507$146.00
.30-378 Wby.180Barnes TSXMB.453$159.00
.30-378 Wby.200PartitionMB.481$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

.300 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
150 Partition .387 2.50 3.20 0.00 -7.70 -20.90
165 SP .387 2.80 3.50 0.00 -8.50 -23.10
165 Barnes TSX .398 2.90 3.70 0.00 -9.00 -24.20
165 BST .475 2.70 3.40 0.00 -8.10 -21.40
180 Spitzer .331 3.60 4.42 0.00 -10.91 -29.97
180 SP .425 3.10 3.80 0.00 -9.00 -24.40
180 Barnes TSX .453 2.95 3.69 0.00 -8.81 -23.61
180 BST .507 2.80 3.60 0.00 -8.40 -22.40
180 Accubond .507 2.90 3.60 0.00 -8.40 -22.40
180 Partition .474 3.00 3.70 0.00 -8.60 -23.10
200 Partition .481 3.50 4.20 0.00 -9.80 -26.20
150 SP .338 2.60 3.30 0.00 -8.20 -22.60
130 Barnes TTSX .350 2.28 3.03 0.00 -7.58 -20.71
.30-378 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
130 Barnes TTSX .350 2.12 2.85 0.00 -7.18 -19.61
165 Barnes TSX .398 2.40 3.10 0.00 -7.40 -19.60
165 BST .475 2.40 3.00 0.00 -7.40 -19.50
180 BST .507 2.50 3.10 0.00 -7.50 -20.00
180 Accubond .507 2.50 3.10 0.00 -7.50 -20.00
180 Barnes TSX .453 2.66 3.38 0.00 -8.12 -21.77
200 Partition .481 3.20 3.90 0.00 -9.10 -24.30

Energy Comparison

.300 Wby.
Bullet B/C Energy (Foot-Pounds)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
150 Partition .387 4173 3547 3005 2536 2128 1773
165 SP .387 4210 3573 3021 2542 2126 1765
165 Barnes TSX .398 4064 3434 2891 2420 2012 1660
165 BST .475 4111 3596 3138 2730 2367 2042
180 Spitzer .331 3967 3259 2659 2150 1720 1361
180 SP .425 4195 3607 3091 2637 2237 1886
180 Barnes TSX .453 4197 3642 3151 2715 2319 1987
180 BST .507 4223 3721 3271 2867 2504 2178
180 Accubond .507 4223 3721 3271 2868 2505 2179
180 Partition .474 4195 3665 3193 2772 2396 2062
200 Partition .481 4158 3631 3161 2741 2366 2032
150 SP .338 4173 3462 2862 2351 1916 1547
130 Barnes TTSX .350 3847 3209 2670 2210 1817 1481
.30-378 Wby.
Bullet B/C Energy (Foot-Pounds)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
130 Barnes TTSX .350 4039 3372 2807 2327 1917 1567
165 Barnes TSX .398 4362 3719 3161 2675 2251 1882
165 BST .475 4488 3930 3435 2995 2603 2253
180 BST .507 4676 4126 3634 3193 2797 2441
180 Accubond .507 4676 4126 3634 3193 2797 2441
180 Barnes TSX .453 4513 3921 3398 2935 2524 2160
200 Partition .481 4434 3877 3381 2938 2541 2188

Velocity Comparison

.300 Wby.
Bullet B/C Velocity (Feet per Second)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
150 Partition .387 3540 3263 3004 2759 2528 2307
165 SP .387 3390 3123 2872 2634 2409 2195
165 Barnes TSX .398 3330 3061 2809 2570 2343 2128
165 BST .475 3350 3133 2927 2730 2542 2361
180 Spitzer .331 3150 2855 2579 2319 2074 1845
180 SP .425 3240 3004 2781 2569 2366 2173
180 Barnes TSX .453 3240 3018 2807 2606 2414 2230
180 BST .507 3250 3051 2806 2676 2503 2334
180 Accubond .507 3250 3051 2861 2678 2503 2335
180 Partition .474 3240 3028 2826 2634 2449 2271
200 Partition .481 3060 2860 2668 2485 2308 2139
150 SP .338 3540 3225 2932 2657 2399 2155
130 Barnes TTSX .350 3650 3334 3041 2766 2508 2265
.30-378 Wby.
Bullet B/C Velocity (Feet per Second)
Wt. Grains Bullet Type Muzzle 100 Yds 200 Yds 300 Yds 400 Yds 500 Yds
130 Barnes TTSX .350 3740 3417 3118 2839 2577 2329
165 Barnes TSX .398 3450 3186 2937 2702 2479 2266
165 BST .475 3500 3275 3062 2859 2665 2480
180 BST .507 3420 3213 3015 2826 2645 2471
180 Accubond .507 3420 3213 3015 2826 2645 2471
180 Barnes TSX .453 3360 3132 2916 2709 2513 2324
200 Partition .481 3160 2955 2759 2572 2392 2220

Custom Shop

Make your Weatherby rifle uniquely your own with special custom embellishments.

Visit the Custom Shop

http://www.weatherby.com

Want to take full advantage of Weatherby.com? Sign in or register for an account.

Choose your preferred purchasing option.

Buy OnlineORFind a Dealer

The Weatherby web site was designed for optimal browsing at a screen resolution of 1024 x 768. It appears that your monitor is set for a lower resolution. For best results, we recommend changing your screen resolution. For PC instructions, click here. For Mac, click here.

If you would like to place an order at the Weatherby Store, please call (805) 227-2600.

This website lists retail prices for the United States only. International prices can average significantly higher than USA prices because of the following: import duties, proof house charges, VAT tax, including special handling/shipping costs, customs fees and import/export license fees, etc.