Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:180 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.30-378 Weath. Mag. load data
Case Length (l3):2.913"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:133 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:13.0
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | Peregrine Bushmaster (VRG-3) bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and Vihtavuori N570.
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 3100 | <<locked>> | 86% | 55,985 psi | 88% | 3035 fps | 100% |
| Accurate 3100 | <<locked>> | 86% | 56,086 psi | 88% | 3038 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 47,703 psi | 75% | 2992 fps | 96.3% |
| Accurate 8700ᴾ | <<locked>> | 100% | 47,471 psi | 74% | 2986 fps | 96.2% |
| Accurate High Country | <<locked>> | 82% | 54,288 psi | 85% | 3140 fps | 99.8% |
| Accurate High Country | <<locked>> | 82% | 54,389 psi | 85% | 3143 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 55,274 psi | 87% | 3150 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 84% | 55,390 psi | 87% | 3153 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 84% | 57,435 psi | 90% | 3133 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 57,348 psi | 90% | 3133 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,246 psi | 88% | 3153 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 55,999 psi | 88% | 3150 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 55,347 psi | 87% | 3133 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 55,259 psi | 87% | 3130 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 55,883 psi | 88% | 3261 fps | 98.9% |
| ADI AR 2218 | <<locked>> | 98% | 55,825 psi | 87% | 3258 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 96% | 54,650 psi | 86% | 3153 fps | 100% |
| ADI AR 2225 | <<locked>> | 96% | 54,549 psi | 85% | 3150 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,551 psi | 90% | 3130 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,435 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,956 psi | 89% | 3120 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,826 psi | 89% | 3120 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,652 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,405 psi | 88% | 3140 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,824 psi | 86% | 3045 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,737 psi | 86% | 3045 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,506 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,376 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,303 psi | 87% | 3130 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,172 psi | 86% | 3127 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,664 psi | 84% | 3159 fps | 98.2% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,403 psi | 84% | 3156 fps | 98.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3222 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3215 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,608 psi | 89% | 3110 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,652 psi | 89% | 3114 fps | 98.8% |
| Bofors RP15 | <<locked>> | 88% | 56,043 psi | 88% | 3133 fps | 100% |
| Bofors RP15 | <<locked>> | 88% | 55,941 psi | 88% | 3133 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,201 psi | 87% | 3140 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,085 psi | 86% | 3140 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,652 psi | 89% | 3143 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,405 psi | 88% | 3140 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,840 psi | 89% | 3153 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,739 psi | 89% | 3153 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,868 psi | 86% | 3077 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 84% | 54,969 psi | 86% | 3081 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,551 psi | 90% | 3123 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 53,969 psi | 85% | 3064 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,377 psi | 90% | 3025 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,653 psi | 90% | 3031 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,926 psi | 86% | 3219 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,795 psi | 86% | 3219 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2008 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2011 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,114 psi | 86% | 3054 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,187 psi | 86% | 3058 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 54,563 psi | 86% | 3133 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 54,650 psi | 86% | 3133 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,580 psi | 90% | 3064 fps | 96% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,363 psi | 90% | 3061 fps | 96% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,363 psi | 90% | 3192 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3189 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,418 psi | 85% | 3012 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,346 psi | 85% | 3012 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,752 psi | 86% | 3153 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,853 psi | 86% | 3153 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,724 psi | 89% | 3159 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,811 psi | 89% | 3159 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,043 psi | 88% | 3159 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,941 psi | 88% | 3156 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 54,317 psi | 85% | 3077 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 54,404 psi | 85% | 3077 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2057 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,740 psi | 61% | 2054 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,753 psi | 87% | 3202 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,463 psi | 87% | 3196 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,737 psi | 86% | 3166 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,650 psi | 86% | 3163 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 54,186 psi | 85% | 3045 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 84% | 57,682 psi | 90% | 3100 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 56,768 psi | 89% | 3114 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 56,637 psi | 89% | 3110 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,574 psi | 78% | 3005 fps | 96.4% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,617 psi | 78% | 3005 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,304 psi | 88% | 3107 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,391 psi | 88% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,274 psi | 87% | 3028 fps | 99.6% |
| Somchem S361 | <<locked>> | 82% | 55,332 psi | 87% | 3031 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 56,942 psi | 89% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 57,029 psi | 89% | 3081 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,232 psi | 90% | 3068 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,956 psi | 89% | 3064 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,347 psi | 88% | 3094 fps | 97.3% |
| Vihtavuori N170 | <<locked>> | 92% | 56,304 psi | 88% | 3091 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 84% | 56,420 psi | 88% | 3074 fps | 100% |
| Vihtavuori N555 | <<locked>> | 84% | 56,275 psi | 88% | 3071 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,188 psi | 88% | 3166 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 84% | 56,086 psi | 88% | 3163 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 90% | 57,232 psi | 90% | 3156 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 90% | 57,159 psi | 90% | 3156 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 55,303 psi | 87% | 3173 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 92% | 55,230 psi | 87% | 3169 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 94% | 56,768 psi | 89% | 3241 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 94% | 56,521 psi | 89% | 3235 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,245 psi | 87% | 3133 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,419 psi | 87% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,927 psi | 89% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,811 psi | 89% | 3074 fps | 100% |
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 3100 | <<locked>> | 80% | 45,527 psi | 71% | 2861 fps | 100% |
| Accurate 3100 | <<locked>> | 80% | 45,658 psi | 72% | 2864 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 44,150 psi | 69% | 2920 fps | 95.2% |
| Accurate 8700 | <<locked>> | 98% | 44,121 psi | 69% | 2920 fps | 95.2% |
| Accurate High Country | <<locked>> | 80% | 50,502 psi | 79% | 3074 fps | 99.5% |
| Accurate High Country | <<locked>> | 80% | 50,749 psi | 80% | 3077 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 47,848 psi | 75% | 3012 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 80% | 47,935 psi | 75% | 3015 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 80% | 50,140 psi | 79% | 3012 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 80% | 50,024 psi | 78% | 3009 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 45,382 psi | 71% | 2953 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 45,281 psi | 71% | 2949 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 80% | 33,576 psi | 53% | 2671 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 80% | 33,489 psi | 52% | 2667 fps | 95.5% |
| ADI AR 2218 | 110.7 gr | 92% | 44,556 psi | 70% | 3025 fps | 95.9% |
| ADI AR 2218 | 110.7 gr | 92% | 44,324 psi | 69% | 3015 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 30,864 psi | 48% | 2635 fps | 97.5% |
| ADI AR 2225 | <<locked>> | 80% | 30,777 psi | 48% | 2631 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,401 psi | 79% | 3009 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,314 psi | 79% | 3005 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,922 psi | 78% | 3002 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,821 psi | 78% | 2999 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,064 psi | 72% | 2956 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,963 psi | 72% | 2953 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,701 psi | 70% | 2881 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,585 psi | 70% | 2877 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,928 psi | 61% | 2822 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,827 psi | 61% | 2818 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,300 psi | 80% | 3068 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,198 psi | 80% | 3064 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 42,540 psi | 67% | 2933 fps | 95.2% |
| Alliant Reloder-33 | <<locked>> | 88% | 42,453 psi | 67% | 2933 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,818 psi | 72% | 2995 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,585 psi | 71% | 2992 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,279 psi | 68% | 2854 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,366 psi | 68% | 2858 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 42,757 psi | 67% | 2887 fps | 99% |
| Bofors RP15 | <<locked>> | 80% | 42,656 psi | 67% | 2884 fps | 99% |
| Bofors RP30 | <<locked>> | 80% | 36,201 psi | 57% | 2753 fps | 96.7% |
| Bofors RP30 | <<locked>> | 80% | 36,114 psi | 57% | 2749 fps | 96.7% |
| Bofors RP5 | <<locked>> | 80% | 46,064 psi | 72% | 2956 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 45,963 psi | 72% | 2953 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 80% | 36,666 psi | 57% | 2756 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 80% | 36,579 psi | 57% | 2753 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 80% | 47,761 psi | 75% | 2949 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 47,848 psi | 75% | 2949 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,905 psi | 74% | 2930 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,992 psi | 74% | 2933 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,867 psi | 84% | 2976 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,983 psi | 85% | 2979 fps | 100% |
| Hodgdon Retumbo | 90.9 gr | 80% | 38,043 psi | 60% | 2874 fps | 98.9% |
| Hodgdon Retumbo | 90.9 gr | 80% | 37,942 psi | 59% | 2874 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 44% | 1798 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 44% | 1798 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,414 psi | 76% | 2936 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,501 psi | 76% | 2936 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 44,019 psi | 69% | 2930 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 44,150 psi | 69% | 2936 fps | 98.6% |
| IMR 7977 Enduron | <<locked>> | 90% | 53,853 psi | 84% | 3002 fps | 95.2% |
| IMR 7977 Enduron | <<locked>> | 90% | 53,780 psi | 84% | 2999 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 84% | 32,735 psi | 51% | 2674 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 84% | 32,648 psi | 51% | 2674 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 39,204 psi | 61% | 2733 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 39,131 psi | 61% | 2730 fps | 99.7% |
| Norma 217 | <<locked>> | 80% | 28,413 psi | 45% | 2562 fps | 95.2% |
| Norma 217 | <<locked>> | 80% | 28,500 psi | 45% | 2566 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 48,994 psi | 77% | 3025 fps | 100% |
| Norma MRP | <<locked>> | 80% | 49,255 psi | 77% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,657 psi | 70% | 2953 fps | 99% |
| Ramshot Grand | <<locked>> | 80% | 44,527 psi | 70% | 2949 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 80% | 39,885 psi | 63% | 2812 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 80% | 39,987 psi | 63% | 2812 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,080 psi | 46% | 1841 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1844 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,463 psi | 59% | 2848 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,376 psi | 59% | 2844 fps | 99.5% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,173 psi | 58% | 2799 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 36,956 psi | 58% | 2792 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 50,647 psi | 79% | 2982 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 80% | 50,517 psi | 79% | 2979 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 80% | 49,559 psi | 78% | 2992 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 49,458 psi | 78% | 2989 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,180 psi | 72% | 2936 fps | 95.4% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,253 psi | 72% | 2940 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,110 psi | 77% | 2982 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,226 psi | 77% | 2986 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 51,634 psi | 81% | 2966 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 51,735 psi | 81% | 2969 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 49,748 psi | 78% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 49,879 psi | 78% | 2963 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,671 psi | 68% | 2835 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 80% | 43,569 psi | 68% | 2831 fps | 99.5% |
| Vihtavuori N170 | <<locked>> | 88% | 49,139 psi | 77% | 2963 fps | 95.6% |
| Vihtavuori N170 | <<locked>> | 88% | 49,081 psi | 77% | 2963 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 49,327 psi | 77% | 2959 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 49,182 psi | 77% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,791 psi | 76% | 3031 fps | 99% |
| Vihtavuori N560 | <<locked>> | 80% | 48,559 psi | 76% | 3028 fps | 99% |
| Vihtavuori N565 | <<locked>> | 80% | 40,422 psi | 63% | 2831 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 40,335 psi | 63% | 2831 fps | 97.4% |
| Vihtavuori N568 | <<locked>> | 82% | 38,261 psi | 60% | 2818 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 82% | 38,159 psi | 60% | 2815 fps | 95.2% |
| Vihtavuori N570 | 103.8 gr | 88% | 45,498 psi | 71% | 3018 fps | 95.7% |
| Vihtavuori N570 | 103.8 gr | 88% | 45,411 psi | 71% | 3018 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,830 psi | 69% | 2946 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,976 psi | 69% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,180 psi | 72% | 2894 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,093 psi | 72% | 2890 fps | 99.5% |
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 .30-378 Weath. Mag. loaded with the .308 | 180gr | Peregrine Bushmaster (VRG-3). ADI AR 2218 delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,261 fps. Accurate 8700 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 59–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Accurate 8700, Alliant Reloder-50 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. Hodgdon Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for .30-378 Weath. Mag. with the .308 | 180gr | Peregrine Bushmaster (VRG-3) 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.