Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 134gr | CutEdge ESP Raptor bullet and 73 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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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>> | 94% | 57,435 psi | 90% | 3438 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,215 psi | 85% | 3419 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,376 psi | 87% | 3540 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 92% | 56,608 psi | 89% | 3543 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 90% | 55,724 psi | 87% | 3484 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 57,580 psi | 90% | 3553 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,866 psi | 81% | 3425 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,427 psi | 73% | 3369 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,448 psi | 87% | 3494 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,695 psi | 89% | 3504 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,216 psi | 87% | 3471 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,638 psi | 90% | 3543 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,998 psi | 86% | 3451 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,853 psi | 86% | 3514 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,724 psi | 87% | 3547 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 56,565 psi | 89% | 3524 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 3504 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 57,638 psi | 90% | 3543 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 56,463 psi | 88% | 3428 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3537 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 56,144 psi | 88% | 3481 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 54,955 psi | 86% | 3438 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 92% | 57,348 psi | 90% | 3484 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,130 psi | 88% | 3461 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,651 psi | 87% | 3399 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,711 psi | 90% | 3668 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 57,203 psi | 90% | 3517 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 58% | 2270 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,897 psi | 86% | 3406 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,375 psi | 85% | 3392 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 54,839 psi | 86% | 3412 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,404 psi | 85% | 3399 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 94% | 55,361 psi | 87% | 3524 fps | 98.3% |
| Lovex S065 | <<locked>> | 84% | 55,071 psi | 86% | 3389 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,927 psi | 89% | 3445 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 54,737 psi | 86% | 3392 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,101 psi | 88% | 3468 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 41,858 psi | 66% | 3271 fps | 97.6% |
| Norma MRP | <<locked>> | 92% | 57,740 psi | 90% | 3570 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 56,579 psi | 89% | 3468 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,420 psi | 88% | 3547 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 86% | 55,666 psi | 87% | 3468 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,969 psi | 86% | 3465 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 2320 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,607 psi | 86% | 3442 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,377 psi | 90% | 3543 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,926 psi | 86% | 3583 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3517 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 57,740 psi | 90% | 3428 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,637 psi | 89% | 3448 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 90% | 54,549 psi | 85% | 3455 fps | 99% |
| Rottweil R 907 | <<locked>> | 84% | 56,463 psi | 88% | 3428 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,071 psi | 86% | 3389 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,927 psi | 89% | 3445 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,334 psi | 90% | 3287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,302 psi | 85% | 3333 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,128 psi | 85% | 3448 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 57,261 psi | 90% | 3422 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,708 psi | 86% | 3366 fps | 97.5% |
| Somchem S365 | <<locked>> | 88% | 57,421 psi | 90% | 3468 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,187 psi | 86% | 3422 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 55,042 psi | 86% | 3330 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,578 psi | 86% | 3396 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,969 psi | 86% | 3399 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 86% | 57,711 psi | 90% | 3461 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,942 psi | 89% | 3484 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,435 psi | 90% | 3563 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 57,551 psi | 90% | 3533 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3527 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,389 psi | 85% | 3340 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,347 psi | 88% | 3488 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 94% | 53,577 psi | 84% | 3533 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,274 psi | 87% | 3415 fps | 99% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 34,853 psi | 55% | 2963 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 46,978 psi | 74% | 3284 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 44,367 psi | 70% | 3307 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 88% | 48,762 psi | 76% | 3386 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 39,175 psi | 61% | 3127 fps | 95% |
| ADI AR 2213 | <<locked>> | 86% | 43,250 psi | 68% | 3255 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 41,959 psi | 66% | 3202 fps | 95% |
| ADI AR 2225 | <<locked>> | 92% | 35,070 psi | 55% | 3068 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,092 psi | 71% | 3294 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,678 psi | 83% | 3435 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,262 psi | 62% | 3117 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 84% | 40,480 psi | 63% | 3182 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,620 psi | 53% | 3002 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 31,256 psi | 49% | 2946 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,376 psi | 59% | 3156 fps | 98.5% |
| Bofors RP15 | <<locked>> | 86% | 40,205 psi | 63% | 3176 fps | 95.4% |
| Bofors RP30 | <<locked>> | 92% | 40,973 psi | 64% | 3212 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 40,480 psi | 63% | 3182 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 49,559 psi | 78% | 3297 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 90% | 40,030 psi | 63% | 3159 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 48,878 psi | 77% | 3343 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 51,401 psi | 81% | 3369 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 46,282 psi | 73% | 3264 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,382 psi | 71% | 3245 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,366 psi | 66% | 3156 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,608 psi | 59% | 3189 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,139 psi | 77% | 3369 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 43% | 2041 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,005 psi | 71% | 3209 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,937 psi | 80% | 3327 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 44,628 psi | 70% | 3219 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,643 psi | 70% | 3196 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 44,643 psi | 70% | 3297 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 48,399 psi | 76% | 3264 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 46,688 psi | 73% | 3245 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 31,865 psi | 50% | 2874 fps | 95% |
| Norma 204 | <<locked>> | 80% | 45,353 psi | 71% | 3251 fps | 96.9% |
| Norma 217 | <<locked>> | 96% | 36,230 psi | 57% | 3120 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 36,825 psi | 58% | 3114 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 46,050 psi | 72% | 3268 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 44,817 psi | 70% | 3310 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 45,208 psi | 71% | 3261 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 37,014 psi | 58% | 3074 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 2083 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,282 psi | 74% | 3304 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,614 psi | 71% | 3323 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,548 psi | 54% | 3081 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,934 psi | 72% | 3346 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 53,925 psi | 85% | 3366 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,323 psi | 68% | 3176 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 41,321 psi | 65% | 3173 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 49,559 psi | 78% | 3297 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,399 psi | 76% | 3264 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 46,688 psi | 73% | 3245 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,780 psi | 84% | 3232 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,442 psi | 74% | 3202 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,973 psi | 64% | 3163 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 53,737 psi | 84% | 3363 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 47,601 psi | 75% | 3228 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 43,134 psi | 68% | 3215 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,117 psi | 61% | 3081 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 80% | 51,459 psi | 81% | 3271 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,587 psi | 75% | 3268 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 38,885 psi | 61% | 3061 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 46,992 psi | 74% | 3264 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 37,695 psi | 59% | 3094 fps | 99% |
| Vihtavuori N560 | <<locked>> | 86% | 46,151 psi | 72% | 3333 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 92% | 46,412 psi | 73% | 3314 fps | 96% |
| Vihtavuori N568 | <<locked>> | 98% | 50,879 psi | 80% | 3448 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,123 psi | 74% | 3215 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,023 psi | 77% | 3346 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,936 psi | 47% | 2999 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 41,379 psi | 65% | 3130 fps | 96% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 79 powders for .30-378 Weath. Mag. loaded with the .308 | 134gr | CutEdge ESP Raptor. Hodgdon Retumbo delivers the highest muzzle velocity at 3,668 fps; across all powders the maximum-charge window runs from 2,270 fps to 3,668 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 134.0 gr projectile in 0.308" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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-33, IMR 7977 Enduron, Vihtavuori N170 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.