Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:146 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:1:11.0
Load data in caliber .30-378 Weath. Mag. with .308 | 146gr | Peregrine Glider (Glider GRM) bullet and 138 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Vihtavuori N560.
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>> | 90% | 54,650 psi | 86% | 3284 fps | 100% |
| Accurate 3100 | <<locked>> | 90% | 54,650 psi | 86% | 3284 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,013 psi | 86% | 3317 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,013 psi | 86% | 3317 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,565 psi | 89% | 3455 fps | 99.2% |
| Accurate High Country | <<locked>> | 88% | 56,565 psi | 89% | 3455 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 88% | 53,780 psi | 84% | 3386 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 88% | 53,780 psi | 84% | 3386 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 88% | 56,463 psi | 88% | 3389 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 88% | 56,463 psi | 88% | 3389 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 90% | 54,679 psi | 86% | 3396 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 90% | 54,679 psi | 86% | 3396 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3422 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3422 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3369 fps | 100% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3369 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,608 psi | 89% | 3383 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,608 psi | 89% | 3383 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,449 psi | 88% | 3389 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,449 psi | 88% | 3389 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,927 psi | 88% | 3376 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,927 psi | 88% | 3376 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,984 psi | 86% | 3389 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,984 psi | 86% | 3389 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,521 psi | 89% | 3356 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,521 psi | 89% | 3356 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,579 psi | 89% | 3428 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,579 psi | 89% | 3428 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,464 psi | 90% | 3451 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,464 psi | 90% | 3451 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3432 fps | 96.4% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3432 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,985 psi | 88% | 3346 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,985 psi | 88% | 3346 fps | 96.8% |
| Bofors RP15 | <<locked>> | 92% | 54,157 psi | 85% | 3373 fps | 99.4% |
| Bofors RP15 | <<locked>> | 92% | 54,157 psi | 85% | 3373 fps | 99.4% |
| Bofors RP30 | <<locked>> | 98% | 56,449 psi | 88% | 3432 fps | 99.4% |
| Bofors RP30 | <<locked>> | 98% | 56,449 psi | 88% | 3432 fps | 99.4% |
| Bofors RP5 | <<locked>> | 90% | 54,984 psi | 86% | 3389 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 54,984 psi | 86% | 3389 fps | 99.6% |
| Bofors RP7 | <<locked>> | 82% | 56,666 psi | 89% | 3323 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,666 psi | 89% | 3323 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 54,708 psi | 86% | 3386 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 96% | 54,708 psi | 86% | 3386 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 82% | 56,768 psi | 89% | 3383 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,768 psi | 89% | 3383 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,157 psi | 85% | 3323 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 54,157 psi | 85% | 3323 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,884 psi | 89% | 3373 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,884 psi | 89% | 3373 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,492 psi | 89% | 3297 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,492 psi | 89% | 3297 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,506 psi | 87% | 3514 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,506 psi | 87% | 3514 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 58% | 2195 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 58% | 2195 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,259 psi | 87% | 3307 fps | 99.9% |
| IMR 4350 | <<locked>> | 84% | 55,259 psi | 87% | 3307 fps | 99.9% |
| IMR 4831 | <<locked>> | 84% | 55,492 psi | 87% | 3310 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,492 psi | 87% | 3310 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,795 psi | 86% | 3307 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,795 psi | 86% | 3307 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 92% | 56,782 psi | 89% | 3442 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 92% | 56,782 psi | 89% | 3442 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,789 psi | 73% | 3258 fps | 97.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,789 psi | 73% | 3258 fps | 97.7% |
| Lovex S065 | <<locked>> | 82% | 55,361 psi | 87% | 3287 fps | 100% |
| Lovex S065 | <<locked>> | 82% | 55,361 psi | 87% | 3287 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,319 psi | 90% | 3343 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,319 psi | 90% | 3343 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,217 psi | 88% | 3310 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,217 psi | 88% | 3310 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,550 psi | 89% | 3369 fps | 99.5% |
| Norma 204 | <<locked>> | 84% | 56,550 psi | 89% | 3369 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 3287 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 3287 fps | 99.4% |
| Norma MRP | <<locked>> | 88% | 54,882 psi | 86% | 3409 fps | 100% |
| Norma MRP | <<locked>> | 88% | 54,882 psi | 86% | 3409 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,203 psi | 90% | 3363 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,203 psi | 90% | 3363 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 53,708 psi | 84% | 3389 fps | 99% |
| Ramshot Grand | <<locked>> | 90% | 53,708 psi | 84% | 3389 fps | 99% |
| Ramshot Hunter | <<locked>> | 84% | 56,318 psi | 88% | 3366 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 56,318 psi | 88% | 3366 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,521 psi | 89% | 3379 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,521 psi | 89% | 3379 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,116 psi | 60% | 2247 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,116 psi | 60% | 2247 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,477 psi | 87% | 3343 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,477 psi | 87% | 3343 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,099 psi | 85% | 3373 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,099 psi | 85% | 3373 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,768 psi | 89% | 3504 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,768 psi | 89% | 3504 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,159 psi | 88% | 3448 fps | 98.5% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,159 psi | 88% | 3448 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 88% | 57,145 psi | 90% | 3356 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 57,145 psi | 90% | 3356 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 88% | 55,579 psi | 87% | 3366 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 55,579 psi | 87% | 3366 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 56,666 psi | 89% | 3323 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 56,666 psi | 89% | 3323 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,361 psi | 87% | 3287 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,361 psi | 87% | 3287 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,319 psi | 90% | 3343 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,319 psi | 90% | 3343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,447 psi | 85% | 3232 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,447 psi | 85% | 3232 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,172 psi | 86% | 3360 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,172 psi | 86% | 3360 fps | 99.6% |
| Somchem S361 | <<locked>> | 86% | 55,129 psi | 86% | 3274 fps | 98.4% |
| Somchem S361 | <<locked>> | 86% | 55,129 psi | 86% | 3274 fps | 98.4% |
| Somchem S365 | <<locked>> | 84% | 54,549 psi | 85% | 3304 fps | 100% |
| Somchem S365 | <<locked>> | 84% | 54,549 psi | 85% | 3304 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,941 psi | 88% | 3330 fps | 99.9% |
| Somchem S385 | <<locked>> | 88% | 55,941 psi | 88% | 3330 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 55,158 psi | 86% | 3294 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,158 psi | 86% | 3294 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,854 psi | 88% | 3310 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 92% | 55,854 psi | 88% | 3310 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 54,418 psi | 85% | 3294 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 54,418 psi | 85% | 3294 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,534 psi | 85% | 3327 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,534 psi | 85% | 3327 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,505 psi | 85% | 3402 fps | 98.5% |
| Vihtavuori N560 | <<locked>> | 88% | 54,505 psi | 85% | 3402 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 94% | 55,187 psi | 86% | 3386 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 94% | 55,187 psi | 86% | 3386 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 98% | 56,739 psi | 89% | 3458 fps | 98.2% |
| Vihtavuori N568 | <<locked>> | 98% | 56,739 psi | 89% | 3458 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,882 psi | 86% | 3235 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,882 psi | 86% | 3235 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,956 psi | 89% | 3386 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,956 psi | 89% | 3386 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,912 psi | 88% | 3445 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,912 psi | 88% | 3445 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,072 psi | 88% | 3323 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,072 psi | 88% | 3323 fps | 99.6% |
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 3100 | <<locked>> | 80% | 38,435 psi | 60% | 2959 fps | 98.4% |
| Accurate 3100 | <<locked>> | 80% | 38,435 psi | 60% | 2959 fps | 98.4% |
| Accurate 4350 | <<locked>> | 80% | 51,372 psi | 81% | 3258 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 51,372 psi | 81% | 3258 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 42,337 psi | 66% | 3153 fps | 96% |
| Accurate High Country | <<locked>> | 80% | 42,337 psi | 66% | 3153 fps | 96% |
| Accurate MAGPRO | <<locked>> | 84% | 46,369 psi | 73% | 3232 fps | 96% |
| Accurate MAGPRO | <<locked>> | 84% | 46,369 psi | 73% | 3232 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 42,815 psi | 67% | 3117 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 80% | 42,815 psi | 67% | 3117 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 41,002 psi | 64% | 3100 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 82% | 41,002 psi | 64% | 3100 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 39,972 psi | 63% | 3064 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 90% | 39,972 psi | 63% | 3064 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 33,765 psi | 53% | 2940 fps | 96.3% |
| ADI AR 2225 | <<locked>> | 88% | 33,765 psi | 53% | 2940 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,221 psi | 68% | 3117 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,221 psi | 68% | 3117 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,211 psi | 77% | 3264 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,211 psi | 77% | 3264 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,786 psi | 67% | 3107 fps | 97.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,786 psi | 67% | 3107 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,566 psi | 60% | 3035 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,566 psi | 60% | 3035 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,246 psi | 58% | 2989 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,246 psi | 58% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,126 psi | 50% | 2887 fps | 97.1% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,126 psi | 50% | 2887 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,916 psi | 66% | 3159 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,916 psi | 66% | 3159 fps | 99.8% |
| Alliant Reloder-33 | <<locked>> | 98% | 50,618 psi | 79% | 3350 fps | 95.3% |
| Alliant Reloder-33 | <<locked>> | 98% | 50,618 psi | 79% | 3350 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,095 psi | 77% | 3212 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,095 psi | 77% | 3212 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 38,435 psi | 60% | 3028 fps | 95.8% |
| Bofors RP15 | <<locked>> | 82% | 38,435 psi | 60% | 3028 fps | 95.8% |
| Bofors RP30 | <<locked>> | 88% | 39,450 psi | 62% | 3074 fps | 95.5% |
| Bofors RP30 | <<locked>> | 88% | 39,450 psi | 62% | 3074 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 38,566 psi | 60% | 3035 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 38,566 psi | 60% | 3035 fps | 96.1% |
| Bofors RP7 | <<locked>> | 80% | 53,098 psi | 83% | 3261 fps | 99.7% |
| Bofors RP7 | <<locked>> | 80% | 53,098 psi | 83% | 3261 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 37,971 psi | 60% | 3015 fps | 95.4% |
| Hodgdon H1000 | <<locked>> | 86% | 37,971 psi | 60% | 3015 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 52,997 psi | 83% | 3314 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 52,997 psi | 83% | 3314 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 82% | 43,772 psi | 69% | 3110 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 82% | 43,772 psi | 69% | 3110 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,960 psi | 67% | 3091 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,960 psi | 67% | 3091 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,180 psi | 72% | 3123 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,180 psi | 72% | 3123 fps | 100% |
| Hodgdon Retumbo | 94.9 gr | 84% | 36,129 psi | 57% | 3058 fps | 95.8% |
| Hodgdon Retumbo | 94.9 gr | 84% | 36,129 psi | 57% | 3058 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1972 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1972 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,573 psi | 76% | 3182 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 48,573 psi | 76% | 3182 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 48,602 psi | 76% | 3189 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,602 psi | 76% | 3189 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,177 psi | 66% | 3045 fps | 95.4% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,177 psi | 66% | 3045 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 82% | 39,552 psi | 62% | 3074 fps | 95% |
| IMR 7828 SSC | <<locked>> | 82% | 39,552 psi | 62% | 3074 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 96% | 40,495 psi | 63% | 3114 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 40,495 psi | 63% | 3114 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 51,938 psi | 81% | 3228 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 51,938 psi | 81% | 3228 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,386 psi | 79% | 3219 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 50,386 psi | 79% | 3219 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 32,822 psi | 51% | 2808 fps | 96.6% |
| Lovex S071 | <<locked>> | 80% | 32,822 psi | 51% | 2808 fps | 96.6% |
| Norma 204 | <<locked>> | 80% | 49,168 psi | 77% | 3228 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 49,168 psi | 77% | 3228 fps | 98.6% |
| Norma 217 | <<locked>> | 92% | 35,317 psi | 55% | 2999 fps | 96.2% |
| Norma 217 | <<locked>> | 92% | 35,317 psi | 55% | 2999 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 40,915 psi | 64% | 3117 fps | 98.1% |
| Norma MRP | <<locked>> | 80% | 40,915 psi | 64% | 3117 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 50,096 psi | 79% | 3238 fps | 100% |
| Norma URP | <<locked>> | 80% | 50,096 psi | 79% | 3238 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 39,392 psi | 62% | 3081 fps | 95.4% |
| Ramshot Grand | <<locked>> | 82% | 39,392 psi | 62% | 3081 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 49,124 psi | 77% | 3235 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 49,124 psi | 77% | 3235 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 82% | 35,259 psi | 55% | 2936 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 82% | 35,259 psi | 55% | 2936 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 45% | 2018 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 45% | 2018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,721 psi | 81% | 3278 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,721 psi | 81% | 3278 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,169 psi | 79% | 3304 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,169 psi | 79% | 3304 fps | 100% |
| ReloadSwiss RS 76 | 99.1 gr | 82% | 32,909 psi | 52% | 2943 fps | 95.6% |
| ReloadSwiss RS 76 | 99.1 gr | 82% | 32,909 psi | 52% | 2943 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 44,164 psi | 69% | 3205 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 44,164 psi | 69% | 3205 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 43,845 psi | 69% | 3091 fps | 96.5% |
| Rottweil R 904 | <<locked>> | 80% | 43,845 psi | 69% | 3091 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 42,134 psi | 66% | 3091 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 42,134 psi | 66% | 3091 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 80% | 53,098 psi | 83% | 3261 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 80% | 53,098 psi | 83% | 3261 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,938 psi | 81% | 3228 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,938 psi | 81% | 3228 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,386 psi | 79% | 3219 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 50,386 psi | 79% | 3219 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,995 psi | 80% | 3169 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,995 psi | 80% | 3169 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,800 psi | 66% | 3084 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,800 psi | 66% | 3084 fps | 97.2% |
| Somchem S361 | <<locked>> | 80% | 44,788 psi | 70% | 3074 fps | 96.1% |
| Somchem S361 | <<locked>> | 80% | 44,788 psi | 70% | 3074 fps | 96.1% |
| Somchem S365 | <<locked>> | 80% | 47,485 psi | 74% | 3186 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 47,485 psi | 74% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,540 psi | 67% | 3068 fps | 98.1% |
| Somchem S385 | <<locked>> | 80% | 42,540 psi | 67% | 3068 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 80% | 51,590 psi | 81% | 3235 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 51,590 psi | 81% | 3235 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,043 psi | 58% | 2920 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 80% | 37,043 psi | 58% | 2920 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 80% | 50,865 psi | 80% | 3232 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 50,865 psi | 80% | 3232 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,510 psi | 65% | 3077 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 41,510 psi | 65% | 3077 fps | 99.9% |
| Vihtavuori N560 | 96.1 gr | 82% | 43,888 psi | 69% | 3182 fps | 95.9% |
| Vihtavuori N560 | 96.1 gr | 82% | 43,888 psi | 69% | 3182 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 41,437 psi | 65% | 3097 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 86% | 41,437 psi | 65% | 3097 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 45,281 psi | 71% | 3225 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 92% | 45,281 psi | 71% | 3225 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,126 psi | 80% | 3176 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,126 psi | 80% | 3176 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,185 psi | 83% | 3320 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 53,185 psi | 83% | 3320 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,374 psi | 54% | 3018 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,374 psi | 54% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,131 psi | 61% | 2979 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,131 psi | 61% | 2979 fps | 96.3% |
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 138 powders for .30-378 Weath. Mag. loaded with the .308 | 146gr | Peregrine Glider (Glider GRM). Hodgdon Retumbo delivers the highest muzzle velocity at 3,514 fps; across all powders the maximum-charge window runs from 2,195 fps to 3,514 fps. ADI AR 2217 gives the best case fill at 100 %, and 138 of the 138 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 146.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2217, ADI AR 2225 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, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for .30-378 Weath. Mag. with the .308 | 146gr | Peregrine Glider (Glider GRM) 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.