Description
Details
Designed to replace the 375 Weatherby Magnum, deep penetration and bone smashing power are the calling cards of the 378. Its massive case holds so much powder that Federal designed its super-hot 215 primer to handle the load. Roy Weatherby’s 378 delivers 34 percent more energy at the muzzle than the powerful 375 H&H Magnum. Since 1955, the 378 has become one of the world’s most popular cartridges for the largest of big game animals.
BALLISTICS
Velocity
| Bullet Type | Ballistic Coefficient | @ Muzzle | 100 Yards | 200 Yards | 300 Yards | 400 Yards | 500 Yards |
|---|---|---|---|---|---|---|---|
| 270 Grain Spire Point | 0.380 | 3180 | 2921 | 2677 | 2445 | 2225 | 2017 |
| 270 Grain TSX | 0.326 | 3060 | 2767 | 2493 | 2235 | 1992 | 1767 |
| 300 Grain Round Nose Expanding | 0.250 | 2925 | 2558 | 2220 | 1908 | 1627 | 1383 |
| 300 Grain Full Metal Jacket | 0.275 | 2925 | 2591 | 2280 | 1991 | 1725 | 1489 |
Energy
| Bullet Type | Ballistic Coefficient | @ Muzzle | 100 Yards | 200 Yards | 300 Yards | 400 Yards | 500 Yards |
|---|---|---|---|---|---|---|---|
| 270 Grain Spire Point | 0.380 | 6062 | 5115 | 4295 | 3583 | 2968 | 2438 |
| 270 Grain TSX | 0.326 | 5613 | 4591 | 3726 | 2994 | 2380 | 1871 |
| 300 Grain Round Nose Expanding | 0.250 | 5699 | 4360 | 3283 | 2424 | 1764 | 1274 |
| 300 Grain Full Metal Jacket | 0.275 | 5699 | 4470 | 3461 | 2640 | 1983 | 1476 |
Trajectory
| Bullet Type | Ballistic Coefficient | 100 Yards | 200 Yards | 300 Yards | 400 Yards | 500 Yards |
|---|---|---|---|---|---|---|
| 270 Grain Spire Point | 0.380 | 1.3 | 0.0 | -6.1 | -18.1 | -37.1 |
| 270 Grain TSX | 0.326 | 1.3 | 0.0 | -6.2 | -17.9 | -36.1 |
| 300 Grain Round Nose Expanding | 0.250 | 1.9 | 0.0 | -9.0 | -27.8 | -60.0 |
| 300 Grain Full Metal Jacket | 0.275 | 1.8 | 0.0 | -8.6 | -26.1 | -55.4 |
Specifications
Additional Information
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4 customer reviews
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378 weatherby ... best 375 ...
By Jesse June 24, 2018As a long range caliber it's hard to beat the 378 weatherby ..
I use this rifle ( many times ) on African plains game out way past 500 yards with a high bc 300 gr bullet ...
This is my ultimate hunting experience ever !!
Regards Jesse Wiehahn
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Precision and power
By Tom June 08, 2018One shot kills when hunting boar is guaranteed. Exit holes like the bottom of a beer stud.
If you want just to "plink" around, 0,5" groups of 3 shots at 100 yards are not uncommon if you do reloading with Barnes TSX bullets. -
Exelent
By dråparn December 25, 201610+ moose roebuck and beaver have felt the power of the 378. My favorite rifle
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Raw Power.....
By Norbert August 30, 2016It is the "what ever walks on this planet" cartridge......
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Contact Us
Weatherby Customer Service representatives are available to assist you:
Monday through Friday 8:00 a.m. to 5:00 p.m. (MDT) (307) 675-7800
Written inquires can be mailed to:
Weatherby, Inc.
PO Box 6630
Sheridan, WY 82801
US
NOTE: We are currently in the process of moving our offices to Sheridan, WY. We apologize for any delays this may cause.
Our showroom is now closed in preparation for our move to Sheridan, WY.
