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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 3,500 feet per second. Reintroduced as a Weatherby production cartridge in 1996.
| Bullet Type | Bullet Weight | B/C | @Muzzle | 100 yds | 200 yds | 300 yds | 400 yds | 500 yds |
|---|---|---|---|---|---|---|---|---|
| Barnes® TTSX™ | 165 | .442 | 3494 | 3253 | 3026 | 2810 | 2604 | 2407 |
| Hornady® Interlock® | 180 | .425 | 3420 | 3174 | 2943 | 2724 | 2514 | 2315 |
| Nosler® Ballistic Tip® | 180 | .507 | 3420 | 3213 | 3015 | 2826 | 2645 | 2471 |
| Nosler® Accubond® | 180 | .507 | 3300 | 3099 | 2908 | 2724 | 2548 | 2379 |
| Barnes® TTSX™ | 180 | .484 | 3399 | 3184 | 2979 | 2783 | 2596 | 2416 |
| Hornady® ELD-X® | 220 | .650 | 3050 | 2901 | 2758 | 2619 | 2485 | 2354 |
| Hammer Bullet | 195 | .550 | 3225 | 3043 | 2868 | 2700 | 2539 | 2383 |
| Bullet Type | Bullet Weight | B/C | @Muzzle | 100 yds | 200 yds | 300 yds | 400 yds | 500 yds |
|---|---|---|---|---|---|---|---|---|
| Barnes® TTSX™ | 165 | .442 | 4472 | 3877 | 3354 | 2892 | 2484 | 2123 |
| Hornady® Interlock® | 180 | .425 | 4675 | 4027 | 3462 | 2965 | 2527 | 2141 |
| Nosler® Ballistic Tip® | 180 | .507 | 4676 | 4126 | 3634 | 3193 | 2797 | 2441 |
| Nosler® Accubond® | 180 | .507 | 4352 | 3838 | 3379 | 2966 | 2595 | 2262 |
| Barnes® TTSX™ | 180 | .484 | 4617 | 4050 | 3546 | 3095 | 2693 | 2333 |
| Hornady® ELD-X® | 220 | .650 | 4544 | 4112 | 3716 | 3351 | 3015 | 2706 |
| Hammer Bullet | 195 | .550 | 4503 | 4008 | 3562 | 3157 | 2791 | 2458 |
| Bullet Type | Bullet Weight | B/C | 100 yds | 200 yds | 300 yds | 400 yds | 500 yds |
|---|---|---|---|---|---|---|---|
| Barnes® TTSX™ | 165 | .442 | 2.5 | 3.1 | 0.0 | -7.5 | -20.2 |
| Hornady® Interlock® | 180 | .425 | 2.7 | 3.3 | 0.0 | -8 | -21.6 |
| Nosler® Ballistic Tip® | 180 | .507 | 2.5 | 3.1 | 0.0 | -7.5 | -20.0 |
| Nosler® Accubond® | 180 | .507 | 2.8 | 3.5 | 0.0 | -8.1 | -21.6 |
| Barnes® TTSX™ | 180 | .484 | 2.6 | 3.3 | 0.0 | -7.8 | -20.7 |
| Hornady® ELD-X® | 220 | .650 | 3.3 | 3.9 | 0.0 | -9 | -23.6 |
| Hammer Bullet | 195 | .550 | 2.9 | 3.6 | 0.0 | -8.3 | -22.1 |
Coonhhuter –
I’ve owned a 30378 since they frist came out and whitetail hunted with it and shot deer 400 yds plus with the 165 gr ballistic tip and they hit the ground where they stand awesome round for super long range
BRUCE WISKUS (verified owner) –
I have been shooting the 30-378 since 2005 excellent flat shooting hard hitting round. Have taken elk,mule deer and whitetail out to 600 yards no problem. Grandchildren are using it now and arguing about who is going to get it when I am gone.