Load Specifications
Bullet:.375 | 235gr | Barnes TSX FB
Bullet Manufacturer:Barnes
Bullet Weight:235 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:1:6.0
Load data in caliber .378 Weath. Mag. with .375 | 235gr | Barnes TSX FB bullet and 108 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 Winchester 760.
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% | 55,274 psi | 87% | 2959 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,450 psi | 90% | 3035 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,778 psi | 80% | 3009 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 55,680 psi | 87% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,811 psi | 89% | 3127 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3225 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 82% | 55,230 psi | 87% | 3048 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,623 psi | 89% | 3058 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,476 psi | 85% | 3114 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 3100 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,493 psi | 90% | 3045 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,854 psi | 88% | 3186 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,476 psi | 85% | 3110 fps | 97.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,476 psi | 85% | 3110 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,232 psi | 90% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,450 psi | 90% | 3104 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,186 psi | 85% | 3136 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,463 psi | 87% | 3163 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 3163 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 3097 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,732 psi | 75% | 3031 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,684 psi | 65% | 2943 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 3238 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,303 psi | 87% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,514 psi | 73% | 3012 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 54,302 psi | 85% | 3041 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 3097 fps | 97.4% |
| Bofors RP7 | <<locked>> | 92% | 57,595 psi | 90% | 3081 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,551 psi | 90% | 3077 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,853 psi | 86% | 3058 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,651 psi | 87% | 3127 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 55,521 psi | 87% | 3087 fps | 98.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,028 psi | 88% | 3107 fps | 96.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,868 psi | 86% | 3087 fps | 96% |
| Hodgdon H4895 | <<locked>> | 82% | 55,854 psi | 88% | 3061 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,418 psi | 85% | 3054 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,289 psi | 88% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,057 psi | 88% | 3169 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 56% | 1906 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,159 psi | 90% | 3064 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,449 psi | 88% | 3035 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,999 psi | 88% | 3038 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,303 psi | 87% | 3022 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 55,042 psi | 86% | 3058 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,796 psi | 87% | 3054 fps | 99.1% |
| IMR 4831 | <<locked>> | 96% | 57,334 psi | 90% | 3120 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,361 psi | 87% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,070 psi | 85% | 3038 fps | 96% |
| IMR 8208 XBR | <<locked>> | 82% | 57,493 psi | 90% | 3045 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,448 psi | 87% | 3018 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,711 psi | 90% | 3025 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,014 psi | 88% | 3028 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,579 psi | 87% | 3048 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 56,927 psi | 89% | 3091 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,930 psi | 66% | 2844 fps | 97.6% |
| Norma 201 | <<locked>> | 84% | 57,305 psi | 90% | 3041 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,578 psi | 86% | 2986 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,681 psi | 89% | 3087 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,840 psi | 88% | 3114 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,070 psi | 85% | 3189 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 55,680 psi | 87% | 3117 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,896 psi | 84% | 3058 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,549 psi | 85% | 3114 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,135 psi | 69% | 2943 fps | 96.4% |
| Ramshot TAC | <<locked>> | 82% | 57,740 psi | 90% | 3077 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,608 psi | 57% | 1949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,940 psi | 86% | 3041 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,737 psi | 86% | 3117 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,926 psi | 86% | 3153 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,927 psi | 89% | 3153 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,608 psi | 87% | 3186 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,520 psi | 85% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,331 psi | 85% | 3035 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,333 psi | 88% | 3084 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3146 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 92% | 57,595 psi | 90% | 3081 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,579 psi | 87% | 3048 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,448 psi | 87% | 3018 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,014 psi | 88% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,927 psi | 89% | 3091 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,246 psi | 88% | 3100 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,463 psi | 88% | 3054 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,508 psi | 90% | 3077 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,853 psi | 86% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,825 psi | 87% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,506 psi | 87% | 2999 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3140 fps | 98.3% |
| Somchem S335 | <<locked>> | 82% | 54,476 psi | 85% | 2913 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,246 psi | 88% | 3038 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,389 psi | 85% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,491 psi | 85% | 3018 fps | 95.9% |
| Somchem S365 | <<locked>> | 96% | 54,723 psi | 86% | 3114 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,159 psi | 90% | 3117 fps | 99% |
| Vihtavuori N133 | <<locked>> | 82% | 55,434 psi | 87% | 2900 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,752 psi | 86% | 2946 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,376 psi | 87% | 2966 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,840 psi | 88% | 3005 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,317 psi | 85% | 3054 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,342 psi | 77% | 2972 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 86% | 57,000 psi | 89% | 3012 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,956 psi | 89% | 3114 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3114 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,534 psi | 85% | 3176 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,172 psi | 85% | 3022 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,825 psi | 87% | 3130 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,975 psi | 67% | 3081 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,624 psi | 90% | 3081 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 3051 fps | 97.6% |
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% | 48,356 psi | 76% | 2858 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,050 psi | 74% | 2858 fps | 97% |
| Accurate 3100 | <<locked>> | 90% | 35,592 psi | 56% | 2707 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 45,861 psi | 72% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,621 psi | 54% | 2700 fps | 97.1% |
| Accurate High Country | <<locked>> | 96% | 48,472 psi | 76% | 3091 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 51,866 psi | 81% | 2995 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,961 psi | 69% | 2835 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,614 psi | 70% | 2927 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 48,704 psi | 76% | 3035 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,027 psi | 85% | 2995 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,443 psi | 76% | 3058 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,686 psi | 70% | 2930 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,686 psi | 70% | 2930 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,193 psi | 69% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,340 psi | 74% | 2933 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,229 psi | 54% | 2717 fps | 97.3% |
| Alliant Reloder-17 | 94.4 gr | 80% | 38,783 psi | 61% | 2854 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,150 psi | 69% | 2920 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,353 psi | 70% | 2972 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,411 psi | 41% | 2503 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,301 psi | 54% | 2753 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,605 psi | 51% | 2753 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,648 psi | 81% | 3009 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,424 psi | 68% | 2949 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,295 psi | 69% | 2871 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,353 psi | 70% | 2972 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 39,160 psi | 61% | 2730 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,882 psi | 84% | 3025 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,773 psi | 70% | 2877 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 39,494 psi | 62% | 2815 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 82% | 42,714 psi | 67% | 2844 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 98% | 52,272 psi | 82% | 3045 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,184 psi | 80% | 3025 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,431 psi | 82% | 3005 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,618 psi | 50% | 2605 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,052 psi | 77% | 2986 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,725 psi | 61% | 2828 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 42% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,212 psi | 79% | 2953 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,837 psi | 83% | 2982 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,180 psi | 72% | 2874 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,675 psi | 76% | 2904 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 39,929 psi | 63% | 2766 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,712 psi | 64% | 2766 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 33,460 psi | 52% | 2657 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 48,573 psi | 76% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,778 psi | 80% | 2982 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 54,027 psi | 85% | 2995 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,808 psi | 81% | 2966 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,952 psi | 80% | 2920 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,267 psi | 73% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,014 psi | 60% | 2710 fps | 96.8% |
| Lovex S070 | <<locked>> | 82% | 38,653 psi | 61% | 2743 fps | 95.8% |
| Lovex S071 | <<locked>> | 94% | 34,287 psi | 54% | 2674 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 50,502 psi | 79% | 2936 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,227 psi | 80% | 2936 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,717 psi | 73% | 2920 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,310 psi | 71% | 2920 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 37,811 psi | 59% | 2854 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,766 psi | 54% | 2703 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 47,036 psi | 74% | 2943 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,100 psi | 57% | 2743 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 40,930 psi | 64% | 2871 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 54,041 psi | 85% | 3018 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 43% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,005 psi | 71% | 2861 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,068 psi | 80% | 3058 fps | 100% |
| ReloadSwiss RS 60 | 94.4 gr | 80% | 41,292 psi | 65% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,476 psi | 54% | 2717 fps | 96.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 33,895 psi | 53% | 2726 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 48,124 psi | 75% | 2887 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,568 psi | 65% | 2812 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,342 psi | 77% | 2963 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 43,047 psi | 67% | 2900 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,160 psi | 61% | 2730 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,014 psi | 60% | 2710 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,808 psi | 81% | 2966 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,267 psi | 73% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,653 psi | 61% | 2743 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,888 psi | 67% | 2867 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,692 psi | 83% | 2995 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,343 psi | 79% | 2963 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,576 psi | 81% | 2871 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,410 psi | 68% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,260 psi | 58% | 2651 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,641 psi | 67% | 2894 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,184 psi | 80% | 2867 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,518 psi | 82% | 2982 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,061 psi | 66% | 2812 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 50,894 psi | 80% | 2956 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 31,183 psi | 49% | 2654 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 40,785 psi | 64% | 2818 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 52,141 psi | 82% | 2854 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,240 psi | 76% | 2851 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,617 psi | 76% | 2864 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,190 psi | 63% | 2740 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,201 psi | 57% | 2707 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 43,062 psi | 67% | 2854 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 46,862 psi | 73% | 2854 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,607 psi | 56% | 2703 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 28,848 psi | 45% | 2582 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 98% | 50,778 psi | 80% | 3107 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,520 psi | 56% | 2674 fps | 99.1% |
| Winchester 760 | 92.4 gr | 80% | 36,970 psi | 58% | 2756 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,571 psi | 42% | 2592 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,343 psi | 79% | 2969 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,323 psi | 68% | 2864 fps | 95.2% |
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 108 powders for .378 Weath. Mag. loaded with the .375 | 235gr | Barnes TSX FB. Alliant Reloder-26 delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,238 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 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 235.0 gr projectile in 0.375" calls for a 1:6.0 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, Winchester 760 rank at the top here: for .378 Weath. Mag. with the .375 | 235gr | Barnes TSX FB 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.