Load Specifications
Bullet Manufacturer:Fox Bullets
Bullet Weight:250 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.378 Weath. Mag. load data
Case Length (l3):2.913"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:137 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:15.5
Load data in caliber .378 Weath. Mag. with .375 | 250gr | Fox Classic Hunter bullet and 110 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 55,434 psi | 87% | 2861 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,566 psi | 90% | 2943 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 2917 fps | 99.4% |
| Accurate 4064 | <<locked>> | 86% | 55,854 psi | 88% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,913 psi | 89% | 3031 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3127 fps | 97.7% |
| ADI AR 2206H | <<locked>> | 82% | 55,376 psi | 87% | 2953 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,724 psi | 89% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,491 psi | 85% | 3022 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,156 psi | 82% | 3009 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,696 psi | 90% | 2946 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,956 psi | 88% | 3087 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,534 psi | 85% | 3018 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,534 psi | 85% | 3018 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,276 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,624 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,740 psi | 90% | 3091 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,448 psi | 87% | 3064 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,305 psi | 90% | 3064 fps | 98.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 3005 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,776 psi | 75% | 2943 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,698 psi | 65% | 2858 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3140 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,419 psi | 87% | 2972 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,485 psi | 73% | 2923 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 54,346 psi | 85% | 2943 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 3005 fps | 97.7% |
| Bofors RP7 | <<locked>> | 92% | 57,566 psi | 90% | 2982 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,624 psi | 90% | 2979 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,955 psi | 86% | 2963 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,622 psi | 87% | 3031 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 90% | 55,550 psi | 87% | 2992 fps | 98.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 3015 fps | 96.6% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,810 psi | 86% | 2995 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 82% | 56,028 psi | 88% | 2963 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,418 psi | 85% | 2956 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,376 psi | 88% | 3002 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,101 psi | 88% | 3074 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 56% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,130 psi | 90% | 2963 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,608 psi | 89% | 2933 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,130 psi | 88% | 2940 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,361 psi | 87% | 2923 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 54,955 psi | 86% | 2963 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,825 psi | 87% | 2959 fps | 99.3% |
| IMR 4831 | <<locked>> | 96% | 57,377 psi | 90% | 3022 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,390 psi | 87% | 2979 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3005 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2976 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 82% | 57,696 psi | 90% | 2946 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,651 psi | 87% | 2923 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,375 psi | 85% | 2874 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,115 psi | 88% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,651 psi | 87% | 2953 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 56,942 psi | 89% | 2995 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,901 psi | 66% | 2762 fps | 98% |
| Norma 201 | <<locked>> | 84% | 57,479 psi | 90% | 2943 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,679 psi | 86% | 2890 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,855 psi | 89% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,825 psi | 87% | 3018 fps | 98.2% |
| Norma MRPᴾ | <<locked>> | 100% | 53,911 psi | 84% | 3094 fps | 99.3% |
| Norma URP | <<locked>> | 94% | 55,695 psi | 87% | 3018 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,998 psi | 85% | 2963 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,719 psi | 78% | 2989 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 94% | 54,534 psi | 85% | 3018 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,092 psi | 69% | 2858 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,637 psi | 57% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,013 psi | 86% | 2946 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,969 psi | 86% | 3022 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,042 psi | 86% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,855 psi | 89% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,622 psi | 87% | 3087 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,509 psi | 63% | 2867 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 84% | 54,607 psi | 86% | 2894 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,389 psi | 85% | 2936 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,318 psi | 88% | 2992 fps | 97.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3051 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 92% | 57,566 psi | 90% | 2982 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,651 psi | 87% | 2953 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,651 psi | 87% | 2923 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,115 psi | 88% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,942 psi | 89% | 2995 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,260 psi | 88% | 3002 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,594 psi | 89% | 2956 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,551 psi | 90% | 2979 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,027 psi | 86% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,912 psi | 88% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,579 psi | 87% | 2904 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,956 psi | 88% | 3045 fps | 98.5% |
| Somchem S335 | <<locked>> | 82% | 54,679 psi | 86% | 2818 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,420 psi | 88% | 2943 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,549 psi | 85% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,520 psi | 85% | 2927 fps | 96.2% |
| Somchem S365 | <<locked>> | 96% | 54,781 psi | 86% | 3018 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3022 fps | 99.2% |
| Vihtavuori N133 | <<locked>> | 82% | 55,564 psi | 87% | 2802 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,911 psi | 86% | 2848 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,477 psi | 87% | 2871 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,883 psi | 88% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,230 psi | 85% | 2956 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2881 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 86% | 57,087 psi | 89% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,985 psi | 89% | 3015 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,374 psi | 84% | 3018 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,389 psi | 85% | 3084 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,128 psi | 85% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,825 psi | 87% | 3035 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,047 psi | 67% | 2995 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,638 psi | 90% | 2982 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2963 fps | 98% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,588 psi | 76% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,152 psi | 74% | 2769 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 33,243 psi | 52% | 2569 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 46,050 psi | 72% | 2769 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,635 psi | 54% | 2618 fps | 97.6% |
| Accurate High Country | <<locked>> | 94% | 45,049 psi | 71% | 2933 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 51,895 psi | 81% | 2897 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,077 psi | 69% | 2746 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 41,858 psi | 66% | 2782 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 48,675 psi | 76% | 2946 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,041 psi | 85% | 2894 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,428 psi | 76% | 2966 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 41,858 psi | 66% | 2782 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 41,858 psi | 66% | 2782 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,295 psi | 69% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,384 psi | 74% | 2841 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,374 psi | 54% | 2638 fps | 97.8% |
| Alliant Reloder-17 | 90.2 gr | 80% | 38,798 psi | 61% | 2766 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,379 psi | 65% | 2776 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,379 psi | 65% | 2822 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,513 psi | 42% | 2434 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,140 psi | 50% | 2612 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 84% | 30,327 psi | 48% | 2605 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,808 psi | 81% | 2917 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 43,424 psi | 68% | 2864 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 44,367 psi | 70% | 2779 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,379 psi | 65% | 2822 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 39,204 psi | 61% | 2644 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,780 psi | 84% | 2923 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,933 psi | 70% | 2792 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 36,999 psi | 58% | 2674 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 80% | 40,103 psi | 63% | 2700 fps | 95% |
| Hodgdon H4831 | <<locked>> | 98% | 52,272 psi | 82% | 2953 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,140 psi | 80% | 2933 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 52,446 psi | 82% | 2907 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,749 psi | 50% | 2526 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,182 psi | 77% | 2890 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,769 psi | 61% | 2746 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 42% | 1637 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,357 psi | 79% | 2858 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,982 psi | 83% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,354 psi | 73% | 2782 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,776 psi | 76% | 2812 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 37,434 psi | 59% | 2625 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,799 psi | 64% | 2680 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 33,605 psi | 53% | 2579 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 48,602 psi | 76% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,807 psi | 80% | 2890 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 46,398 psi | 73% | 2913 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 54,041 psi | 85% | 2894 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,011 psi | 82% | 2871 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,140 psi | 80% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,412 psi | 73% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,174 psi | 60% | 2628 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 36,332 psi | 57% | 2605 fps | 95.5% |
| Lovex S071 | <<locked>> | 94% | 34,330 psi | 54% | 2595 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 50,676 psi | 79% | 2841 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,300 psi | 80% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,731 psi | 73% | 2828 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,322 psi | 66% | 2772 fps | 95.1% |
| Norma MRP | <<locked>> | 90% | 37,884 psi | 59% | 2772 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,867 psi | 55% | 2621 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 46,978 psi | 74% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,253 psi | 72% | 2920 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 33,794 psi | 53% | 2602 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 40,872 psi | 64% | 2789 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,383 psi | 43% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,107 psi | 71% | 2776 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,140 psi | 80% | 2963 fps | 100% |
| ReloadSwiss RS 60 | 90.2 gr | 80% | 41,292 psi | 65% | 2825 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,490 psi | 54% | 2638 fps | 97.2% |
| ReloadSwiss RS 70 | 91.6 gr | 80% | 33,866 psi | 53% | 2644 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,710 psi | 59% | 2795 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 48,109 psi | 75% | 2792 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,684 psi | 65% | 2723 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 46,282 psi | 73% | 2818 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 40,292 psi | 63% | 2756 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 39,204 psi | 61% | 2644 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,174 psi | 60% | 2628 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,011 psi | 82% | 2871 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,412 psi | 73% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,332 psi | 57% | 2605 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,960 psi | 67% | 2779 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,808 psi | 83% | 2900 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,401 psi | 79% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,735 psi | 81% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,540 psi | 68% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,318 psi | 58% | 2569 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,699 psi | 67% | 2808 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 51,372 psi | 81% | 2772 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,692 psi | 83% | 2890 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,264 psi | 66% | 2726 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 50,966 psi | 80% | 2867 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 31,314 psi | 49% | 2575 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 38,218 psi | 60% | 2677 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 52,315 psi | 82% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,428 psi | 76% | 2756 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,733 psi | 76% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,292 psi | 63% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,245 psi | 57% | 2621 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 40,234 psi | 63% | 2710 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,007 psi | 74% | 2766 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,723 psi | 56% | 2625 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 27,006 psi | 42% | 2451 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 98% | 50,792 psi | 80% | 3018 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,636 psi | 56% | 2595 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 37,115 psi | 58% | 2677 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,889 psi | 39% | 2454 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,357 psi | 79% | 2874 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,395 psi | 68% | 2779 fps | 95.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 110 powders for .378 Weath. Mag. loaded with the .375 | 250gr | Fox Classic Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,140 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2213 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .378 Weath. Mag. with the .375 | 250gr | Fox Classic Hunter they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.