Load Specifications
Bullet Manufacturer:Reichenberg
Bullet Weight:245 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 | 245gr | Reichenberg HDB Universal bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Alliant Reloder-26.
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% | 56,434 psi | 88% | 2910 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,636 psi | 86% | 2936 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 2976 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 56,782 psi | 89% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,215 psi | 85% | 3031 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3189 fps | 98% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,404 psi | 85% | 3120 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 82% | 56,260 psi | 88% | 3005 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,580 psi | 90% | 3012 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,506 psi | 87% | 3074 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3068 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,130 psi | 90% | 3143 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,564 psi | 87% | 3074 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,564 psi | 87% | 3074 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,563 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,897 psi | 86% | 3002 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,303 psi | 87% | 3094 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,608 psi | 89% | 3117 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,752 psi | 86% | 3061 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3064 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,612 psi | 67% | 2913 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3199 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,347 psi | 88% | 3025 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,427 psi | 74% | 2979 fps | 96.9% |
| Bofors RP3 | <<locked>> | 86% | 55,259 psi | 87% | 2995 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3064 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 54,897 psi | 86% | 2979 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 55,927 psi | 88% | 3015 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,666 psi | 89% | 3087 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 56,521 psi | 89% | 3045 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3071 fps | 96.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,985 psi | 88% | 3054 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 56,927 psi | 89% | 3015 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,434 psi | 87% | 3009 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,246 psi | 90% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,406 psi | 90% | 3133 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,129 psi | 57% | 1864 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,491 psi | 85% | 2963 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,580 psi | 90% | 2986 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,913 psi | 89% | 2992 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,188 psi | 88% | 2976 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 55,956 psi | 88% | 3015 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,826 psi | 89% | 3012 fps | 99.4% |
| IMR 4831 | <<locked>> | 94% | 54,752 psi | 86% | 3022 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,347 psi | 88% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,013 psi | 86% | 2999 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,560 psi | 79% | 3031 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 82% | 56,492 psi | 89% | 2972 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,100 psi | 86% | 2923 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,956 psi | 89% | 2982 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,507 psi | 89% | 3005 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 54,447 psi | 85% | 2992 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,844 psi | 67% | 2812 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 54,752 psi | 86% | 2943 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,608 psi | 87% | 2940 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,740 psi | 90% | 3041 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,884 psi | 89% | 3071 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 55,288 psi | 87% | 3150 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 56,797 psi | 89% | 3074 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,071 psi | 86% | 3015 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,778 psi | 80% | 3045 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 94% | 55,622 psi | 87% | 3074 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,136 psi | 71% | 2913 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,709 psi | 58% | 1909 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,840 psi | 88% | 2995 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,854 psi | 88% | 3071 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,144 psi | 88% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,244 psi | 85% | 3054 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,826 psi | 89% | 3146 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,510 psi | 65% | 2923 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 55,361 psi | 87% | 2943 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,448 psi | 87% | 2992 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,319 psi | 90% | 3045 fps | 97.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3107 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 90% | 54,897 psi | 86% | 2979 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,507 psi | 89% | 3005 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,492 psi | 89% | 2972 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,956 psi | 89% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,447 psi | 85% | 2992 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,305 psi | 90% | 3054 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,566 psi | 90% | 3012 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,679 psi | 86% | 2972 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,724 psi | 87% | 2871 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,710 psi | 89% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,507 psi | 89% | 2956 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,188 psi | 90% | 3100 fps | 98.7% |
| Somchem S335 | <<locked>> | 82% | 55,405 psi | 87% | 2867 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,348 psi | 90% | 2995 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,405 psi | 87% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,579 psi | 87% | 2979 fps | 96.5% |
| Somchem S365 | <<locked>> | 96% | 55,898 psi | 88% | 3068 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,505 psi | 85% | 3018 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 56,318 psi | 88% | 2851 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,767 psi | 87% | 2897 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,289 psi | 88% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,956 psi | 89% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,361 psi | 87% | 3012 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,444 psi | 79% | 2940 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 54,346 psi | 85% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,389 psi | 85% | 3015 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3074 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 3143 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,071 psi | 86% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,869 psi | 89% | 3091 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,106 psi | 69% | 3051 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,824 psi | 86% | 2982 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 3015 fps | 98.2% |
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% | 49,356 psi | 77% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,848 psi | 75% | 2818 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 34,011 psi | 53% | 2618 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 46,775 psi | 73% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,360 psi | 55% | 2667 fps | 97.7% |
| Accurate High Country | <<locked>> | 94% | 46,050 psi | 72% | 2989 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 98% | 50,444 psi | 79% | 3051 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 52,663 psi | 83% | 2949 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,730 psi | 70% | 2795 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,598 psi | 67% | 2831 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 49,690 psi | 78% | 2999 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,342 psi | 77% | 3018 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,583 psi | 67% | 2831 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,583 psi | 67% | 2831 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,049 psi | 71% | 2822 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,138 psi | 75% | 2890 fps | 100% |
| Alliant Reloder-16 | 86.5 gr | 80% | 34,925 psi | 55% | 2684 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,639 psi | 62% | 2818 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,090 psi | 66% | 2825 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,264 psi | 66% | 2874 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,280 psi | 40% | 2418 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,779 psi | 51% | 2661 fps | 95.5% |
| Alliant Reloder-26 | 100.3 gr | 84% | 31,053 psi | 49% | 2661 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,620 psi | 82% | 2966 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,640 psi | 65% | 2861 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 45,136 psi | 71% | 2828 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,264 psi | 66% | 2874 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 39,856 psi | 62% | 2694 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 45,716 psi | 72% | 2841 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 37,739 psi | 59% | 2723 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 40,756 psi | 64% | 2749 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 49,864 psi | 78% | 2949 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,214 psi | 82% | 2992 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 53,229 psi | 83% | 2959 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,329 psi | 51% | 2572 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,009 psi | 78% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,552 psi | 62% | 2795 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 42% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,111 psi | 80% | 2910 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,853 psi | 84% | 2933 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,007 psi | 74% | 2831 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,400 psi | 77% | 2861 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 38,101 psi | 60% | 2674 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,452 psi | 65% | 2730 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,287 psi | 54% | 2625 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 49,371 psi | 77% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,472 psi | 76% | 2884 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 47,268 psi | 74% | 2969 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 80% | 52,765 psi | 83% | 2920 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,750 psi | 81% | 2871 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,123 psi | 74% | 2828 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,754 psi | 61% | 2674 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 36,999 psi | 58% | 2651 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 32,837 psi | 51% | 2589 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 51,343 psi | 80% | 2890 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,127 psi | 82% | 2890 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,485 psi | 74% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,091 psi | 68% | 2822 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 38,725 psi | 61% | 2825 fps | 96% |
| Norma URP | <<locked>> | 80% | 35,549 psi | 56% | 2671 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,848 psi | 75% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,195 psi | 74% | 2979 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 34,447 psi | 54% | 2651 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 96% | 38,885 psi | 61% | 2779 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,369 psi | 43% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,803 psi | 72% | 2825 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,083 psi | 82% | 3012 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,177 psi | 66% | 2877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,302 psi | 55% | 2687 fps | 97.4% |
| ReloadSwiss RS 70 | 94.6 gr | 80% | 34,519 psi | 54% | 2694 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,580 psi | 60% | 2851 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 48,950 psi | 77% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,482 psi | 67% | 2772 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,152 psi | 74% | 2871 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 41,075 psi | 64% | 2805 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 39,856 psi | 62% | 2694 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,754 psi | 61% | 2674 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,765 psi | 83% | 2920 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,123 psi | 74% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,999 psi | 58% | 2651 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,729 psi | 69% | 2831 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,650 psi | 84% | 2949 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,198 psi | 80% | 2917 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,344 psi | 82% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,121 psi | 69% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,913 psi | 59% | 2615 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,683 psi | 64% | 2799 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 52,040 psi | 82% | 2822 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,505 psi | 84% | 2940 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,888 psi | 67% | 2772 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 51,895 psi | 81% | 2920 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 31,981 psi | 50% | 2621 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,015 psi | 61% | 2730 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,924 psi | 83% | 2805 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,110 psi | 77% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,516 psi | 78% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,973 psi | 64% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,912 psi | 58% | 2671 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 41,089 psi | 64% | 2762 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 47,761 psi | 75% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,405 psi | 57% | 2671 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 27,601 psi | 43% | 2497 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 96% | 48,327 psi | 76% | 3009 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,260 psi | 57% | 2641 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 37,840 psi | 59% | 2726 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,353 psi | 40% | 2503 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,271 psi | 80% | 2927 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,263 psi | 65% | 2772 fps | 95% |
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 | 245gr | Reichenberg HDB Universal. Alliant Reloder-26 delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,199 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 57–90 %, leaving at least 10 % headroom. The 245.0 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, Accurate MAGPRO 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. ReloadSwiss RS 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for .378 Weath. Mag. with the .375 | 245gr | Reichenberg HDB Universal 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.