Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 145gr | CutEdge ESP Raptor bullet and 67 powders. The key underlying parameters are shown in the table above.
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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 55,883 psi | 88% | 3314 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,173 psi | 88% | 3346 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 53,969 psi | 85% | 3409 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 88% | 55,114 psi | 86% | 3419 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 88% | 57,580 psi | 90% | 3419 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 90% | 55,912 psi | 88% | 3422 fps | 99% |
| ADI AR 2217 | <<locked>> | 98% | 54,346 psi | 85% | 3383 fps | 99.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,924 psi | 83% | 3402 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,609 psi | 90% | 3415 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,145 psi | 90% | 3402 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,202 psi | 88% | 3419 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 53,983 psi | 85% | 3323 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,215 psi | 85% | 3392 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,534 psi | 85% | 3409 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,521 psi | 89% | 3468 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,014 psi | 89% | 3373 fps | 97.1% |
| Bofors RP15 | <<locked>> | 92% | 55,390 psi | 87% | 3399 fps | 99.6% |
| Bofors RP30 | <<locked>> | 96% | 53,969 psi | 85% | 3392 fps | 99.1% |
| Bofors RP5 | <<locked>> | 90% | 56,202 psi | 88% | 3419 fps | 99.7% |
| Bofors RP7 | <<locked>> | 82% | 57,508 psi | 90% | 3346 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 55,956 psi | 88% | 3415 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 88% | 55,143 psi | 86% | 3350 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,172 psi | 85% | 3330 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,711 psi | 90% | 3323 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,116 psi | 90% | 3547 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 58% | 2211 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,362 psi | 88% | 3337 fps | 99.9% |
| IMR 4831 | <<locked>> | 84% | 56,710 psi | 89% | 3337 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,738 psi | 87% | 3333 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 90% | 54,027 psi | 85% | 3399 fps | 98.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,182 psi | 76% | 3291 fps | 98.1% |
| Lovex S065 | <<locked>> | 82% | 56,231 psi | 88% | 3310 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,752 psi | 86% | 3307 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,450 psi | 90% | 3337 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,638 psi | 90% | 3396 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 3320 fps | 99.6% |
| Norma MRP | <<locked>> | 88% | 56,333 psi | 88% | 3438 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,621 psi | 86% | 3327 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,187 psi | 86% | 3422 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 84% | 57,435 psi | 90% | 3392 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,693 psi | 84% | 3340 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,218 psi | 60% | 2264 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,623 psi | 89% | 3369 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,303 psi | 87% | 3396 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,041 psi | 85% | 3461 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,432 psi | 84% | 3406 fps | 98.1% |
| Rottweil R 904 | <<locked>> | 86% | 54,549 psi | 85% | 3320 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 88% | 56,681 psi | 89% | 3392 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 57,508 psi | 90% | 3346 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,231 psi | 88% | 3310 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,752 psi | 86% | 3307 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,376 psi | 87% | 3255 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,275 psi | 88% | 3389 fps | 99.7% |
| Somchem S361 | <<locked>> | 86% | 56,115 psi | 88% | 3304 fps | 98.6% |
| Somchem S365 | <<locked>> | 84% | 55,825 psi | 87% | 3330 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,116 psi | 90% | 3360 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 56,173 psi | 88% | 3320 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,130 psi | 90% | 3337 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 55,390 psi | 87% | 3317 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,753 psi | 87% | 3353 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,869 psi | 88% | 3432 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 94% | 56,463 psi | 88% | 3415 fps | 99% |
| Vihtavuori N568 | <<locked>> | 96% | 54,128 psi | 85% | 3412 fps | 97.7% |
| Vihtavuori N570 | <<locked>> | 98% | 55,274 psi | 87% | 3474 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,028 psi | 88% | 3261 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,580 psi | 90% | 3474 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,203 psi | 90% | 3353 fps | 99.7% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,262 psi | 62% | 2982 fps | 98.6% |
| Accurate 4350 | <<locked>> | 80% | 52,344 psi | 82% | 3281 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,294 psi | 68% | 3182 fps | 96.4% |
| Accurate MAGPRO | <<locked>> | 82% | 44,048 psi | 69% | 3186 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 43,656 psi | 68% | 3143 fps | 97.5% |
| ADI AR 2213 | <<locked>> | 82% | 41,887 psi | 66% | 3127 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 90% | 40,973 psi | 64% | 3097 fps | 96% |
| ADI AR 2225 | <<locked>> | 86% | 32,213 psi | 50% | 2894 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,227 psi | 79% | 3291 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,613 psi | 68% | 3133 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,508 psi | 62% | 3064 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,145 psi | 60% | 3015 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,837 psi | 51% | 2910 fps | 97.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,091 psi | 68% | 3189 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 52,185 psi | 82% | 3386 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,053 psi | 78% | 3238 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 36,637 psi | 57% | 2986 fps | 95.1% |
| Bofors RP30 | <<locked>> | 88% | 40,596 psi | 64% | 3104 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 39,508 psi | 62% | 3064 fps | 96.4% |
| Bofors RP7 | <<locked>> | 80% | 53,969 psi | 85% | 3284 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 38,827 psi | 61% | 3045 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 41,611 psi | 65% | 3068 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 82% | 43,845 psi | 69% | 3117 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,137 psi | 74% | 3150 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 36,970 psi | 58% | 3087 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 44% | 1988 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,385 psi | 77% | 3209 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 49,501 psi | 78% | 3215 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,931 psi | 67% | 3068 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 82% | 40,451 psi | 63% | 3104 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,725 psi | 61% | 3071 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 52,823 psi | 83% | 3251 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,256 psi | 80% | 3241 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 33,562 psi | 53% | 2835 fps | 96.9% |
| Norma 204 | <<locked>> | 80% | 50,125 psi | 79% | 3258 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 33,765 psi | 53% | 2956 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 41,872 psi | 66% | 3146 fps | 98.3% |
| Norma URP | <<locked>> | 80% | 51,024 psi | 80% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 40,422 psi | 63% | 3110 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 50,096 psi | 79% | 3261 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 33,475 psi | 52% | 2887 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 45% | 2034 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,750 psi | 83% | 3304 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,387 psi | 81% | 3330 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 33,808 psi | 53% | 2976 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 45,513 psi | 71% | 3238 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 44,643 psi | 70% | 3117 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 43,018 psi | 67% | 3120 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 80% | 53,969 psi | 85% | 3284 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,823 psi | 83% | 3251 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,256 psi | 80% | 3241 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,793 psi | 81% | 3192 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,685 psi | 67% | 3114 fps | 97.4% |
| Somchem S361 | <<locked>> | 80% | 45,672 psi | 72% | 3100 fps | 96.4% |
| Somchem S365 | <<locked>> | 80% | 48,486 psi | 76% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,468 psi | 68% | 3094 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 80% | 52,504 psi | 82% | 3258 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,782 psi | 59% | 2946 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 80% | 51,866 psi | 81% | 3258 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,424 psi | 66% | 3104 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,756 psi | 65% | 3133 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 86% | 42,554 psi | 67% | 3127 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 46,485 psi | 73% | 3255 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 96% | 51,242 psi | 80% | 3396 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,141 psi | 82% | 3199 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,520 psi | 56% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,987 psi | 63% | 3009 fps | 96.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 71 powders for .30-378 Weath. Mag. loaded with the .308 | 145gr | CutEdge ESP Raptor. Hodgdon Retumbo delivers the highest muzzle velocity at 3,547 fps; across all powders the maximum-charge window runs from 2,211 fps to 3,547 fps. ADI AR 2218 gives the best case fill at 100 %, and 71 of the 71 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 145.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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. As outliers, Alliant Reloder-50, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.