338-378 Weatherby Magnum Videos

338-378 Weatherby Magnum

(7 customer reviews)

$164.00$167.00

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Description

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Another Weatherby wildcat, first introduced in the 1960s. This is the ultimate cartridge for long-range, big game hunting. Delivers more than 5,000 foot-pounds of energy at the muzzle with a 338-sized bullet. Extremely powerful and flat shooting. Based upon the 378 case, necked down to 338. Reintroduced as a Weatherby production cartridge in 1998.

Ballistics

VELOCITY DATA (FPS)

Bullet Type Bullet Weight B/C @Muzzle 100 yds 200 yds 300 yds 400 yds 500 yds
Barnes® TTSX™ 225 .514 3180 2987 2802 2625 2455 2290
Nosler® Partition® 250 .473 3060 2856 2662 2475 2297 2125

ENERGY DATA (FT LBS)

Bullet Type Bullet Weight B/C @Muzzle 100 yds 200 yds 300 yds 400 yds 500 yds
Barnes® TTSX™ 225 .514 5052 4457 3923 3442 3010 2621
Nosler® Partition® 250 .473 5197 4528 3933 3401 2927 2507

BULLET TRAJECTORY

Bullet Type Bullet Weight B/C 100 yds 200 yds 300 yds 400 yds 500 yds
Barnes® TTSX™ 225 .514 3.1 3.8 0.0 -8.8 -23.4
Nosler® Partition® 250 .473 3.5 4.2 0.0 -9.8 -26.4

Cartridge
Weight Grains
Bullet Type
Product Code
B/C
Muzzle
100 yards
200 yards
300 yards
400 yards
500 yards
Muzzle
100 yards
200 yards
300 yards
400 yards
500 yards
100 yards
200 yards
300 yards
400 yards
500 yards
338-378 WBY MAG Barnes TTSX
338-378 WBY MAG
225
Barnes® TTSX™
B333225TTSX
.514
Velocity
3180
2987
2802
2625
2455
2290
Energy
5052
4457
3923
3442
3010
2621
Bullet
3.1
3.8
0.0
-8.8
-23.4
338-378 WBY MAG Nosler Partition
338-378 WBY MAG
250
Nosler® Partition®
N333250PT
.473
Velocity
3060
2856
2662
2475
2297
2125
Energy
5197
4528
3933
3401
2927
2507
Bullet
3.5
4.2
0.0
-9.8
-26.4

7 reviews for 338-378 Weatherby Magnum

4.9
Based on 7 reviews
5 star
85
85%
4 star
14
14%
3 star
0%
2 star
0%
1 star
0%
  1. Ed Moeglein

    Very accurate round thru my Mark V 225grn Zero @ 300 yds, 3 shots you an cover with a quarter!
    Wish the ammunition was available, I sure would do a lot more shooting.
    Saving my last 2 boxes for Hunting.

    (0) (0)
  2. T

    people often ask why I need a caliber so big. They ask what I plan on shooting with it. My answer is simple. Whatever I want at whatever distance I want. Great round. A true talking point as well.

    (1) (0)
  3. The duke

    I fell in love with this caliber after owning a true. 378. More power than necessary, but performance to match. Would give 6 stars if I could.

    (0) (0)
  4. jeff50jd

    Very good ammo in my Accumark. The 250 grain Nosler Partition as accurate and make a awesome job on big game. I shoot 3 big moose’s and all 3 stop right there, same thing on black bear. Like the other comment I just wish the ammunition was more attainable here in Canada

    (0) (0)
  5. Westward

    As a gunsmith, firearms dealer, and long range rifle builder of over 40 years, it is a pleasure to report our extensive field testing of the .338-.378 Wby Mag factory loads. Our rifle is an Unlimited Class 18 pound engineering masterpiece with 28 match barrel and PTG muzzle brake. We are consistently keeping this high performance shooter under 1/2 MOA throughout the full extreme ranges here in Western Washington. Job well done. And if you would like to try your skills at over 1/2 mile, this is THE caliber.

    (0) (0)
  6. huntin howie

    Awesome up to 1500 yds. for bear, moose, elk, and more

    (0) (0)
  7. RHINOPENN

    I have owned a mark V in this caliber for over 5yrs now, extremely happy with its performance here in northern BC Canada. It has anchored the biggest game we have here. From Bear,Moose,Elk. Out beyond 1100yrds. I just wish the ammunition was more attainable here in Canada.

    (0) (0)
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