Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Peregrine Glider (Glider GRM) bullet and 70 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 55,492 psi | 87% | 3264 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,796 psi | 87% | 3294 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 57,508 psi | 90% | 3435 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 88% | 54,708 psi | 86% | 3369 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 88% | 57,276 psi | 90% | 3369 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 55,579 psi | 87% | 3376 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 98% | 53,911 psi | 84% | 3337 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 3356 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 57,392 psi | 90% | 3366 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,246 psi | 90% | 3366 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,695 psi | 89% | 3353 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,825 psi | 87% | 3369 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,435 psi | 90% | 3333 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,638 psi | 90% | 3409 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,056 psi | 85% | 3363 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3422 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,652 psi | 89% | 3330 fps | 97.2% |
| Bofors RP15 | <<locked>> | 92% | 55,013 psi | 86% | 3353 fps | 99.6% |
| Bofors RP30 | <<locked>> | 98% | 57,319 psi | 90% | 3412 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 55,825 psi | 87% | 3369 fps | 99.7% |
| Bofors RP7 | <<locked>> | 82% | 57,290 psi | 90% | 3297 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 55,492 psi | 87% | 3366 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 82% | 57,537 psi | 90% | 3360 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,955 psi | 86% | 3304 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,711 psi | 90% | 3353 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,450 psi | 90% | 3278 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,594 psi | 89% | 3501 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 58% | 2169 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,101 psi | 88% | 3287 fps | 99.9% |
| IMR 4831 | <<locked>> | 84% | 56,420 psi | 88% | 3291 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,492 psi | 87% | 3284 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 92% | 57,740 psi | 90% | 3425 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,587 psi | 75% | 3245 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 55,999 psi | 88% | 3261 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,375 psi | 85% | 3258 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,058 psi | 89% | 3291 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,305 psi | 90% | 3346 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 3278 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 55,825 psi | 87% | 3386 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,259 psi | 85% | 3278 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 54,708 psi | 86% | 3376 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 84% | 57,101 psi | 89% | 3343 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,624 psi | 90% | 3366 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,130 psi | 60% | 2218 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,275 psi | 88% | 3320 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,955 psi | 86% | 3350 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 53,548 psi | 84% | 3415 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,188 psi | 90% | 3435 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 86% | 54,360 psi | 85% | 3271 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 88% | 56,376 psi | 88% | 3343 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,290 psi | 90% | 3297 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,999 psi | 88% | 3261 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,375 psi | 85% | 3258 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,056 psi | 86% | 3205 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,970 psi | 88% | 3337 fps | 99.7% |
| Somchem S361 | <<locked>> | 86% | 55,883 psi | 88% | 3258 fps | 98.7% |
| Somchem S365 | <<locked>> | 84% | 55,521 psi | 87% | 3284 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,739 psi | 89% | 3307 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,840 psi | 88% | 3271 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,710 psi | 89% | 3291 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 55,114 psi | 86% | 3271 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,376 psi | 87% | 3307 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,405 psi | 87% | 3386 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 94% | 55,985 psi | 88% | 3366 fps | 99% |
| Vihtavuori N568 | <<locked>> | 98% | 57,667 psi | 90% | 3442 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 98% | 54,665 psi | 86% | 3428 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,622 psi | 87% | 3212 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,696 psi | 90% | 3363 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,145 psi | 90% | 3425 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,927 psi | 89% | 3307 fps | 99.8% |
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% | 39,030 psi | 61% | 2943 fps | 98.7% |
| Accurate 4350 | <<locked>> | 80% | 52,054 psi | 82% | 3232 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,033 psi | 67% | 3140 fps | 96.5% |
| Accurate MAGPRO | <<locked>> | 82% | 43,758 psi | 69% | 3143 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 43,395 psi | 68% | 3097 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 82% | 41,626 psi | 65% | 3087 fps | 96% |
| ADI AR 2217 | <<locked>> | 88% | 37,898 psi | 59% | 2982 fps | 95% |
| ADI AR 2225 | <<locked>> | 86% | 32,010 psi | 50% | 2858 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,801 psi | 69% | 3097 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,067 psi | 78% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,395 psi | 68% | 3091 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,291 psi | 62% | 3022 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,971 psi | 60% | 2976 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,648 psi | 51% | 2874 fps | 97.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,714 psi | 67% | 3146 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 51,561 psi | 81% | 3340 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,734 psi | 78% | 3196 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 36,405 psi | 57% | 2946 fps | 95.3% |
| Bofors RP30 | <<locked>> | 86% | 37,434 psi | 59% | 2989 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 39,291 psi | 62% | 3022 fps | 96.6% |
| Bofors RP7 | <<locked>> | 80% | 53,693 psi | 84% | 3238 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 38,711 psi | 61% | 3005 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 53,722 psi | 84% | 3294 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 41,423 psi | 65% | 3025 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 43,569 psi | 68% | 3074 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,949 psi | 74% | 3100 fps | 100% |
| Hodgdon Retumbo | 92.2 gr | 82% | 34,171 psi | 54% | 2966 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,139 psi | 77% | 3163 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 49,240 psi | 77% | 3169 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,699 psi | 67% | 3025 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 82% | 40,161 psi | 63% | 3058 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,464 psi | 60% | 3031 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 52,663 psi | 83% | 3205 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,995 psi | 80% | 3196 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,344 psi | 52% | 2795 fps | 97% |
| Norma 204 | <<locked>> | 80% | 49,850 psi | 78% | 3212 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 33,518 psi | 53% | 2920 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 41,597 psi | 65% | 3104 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 50,720 psi | 79% | 3215 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 40,103 psi | 63% | 3068 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 49,821 psi | 78% | 3215 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 33,286 psi | 52% | 2851 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 45% | 1991 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,475 psi | 82% | 3258 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,981 psi | 80% | 3281 fps | 100% |
| ReloadSwiss RS 76 | 98.7 gr | 82% | 33,518 psi | 53% | 2936 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 45,005 psi | 71% | 3196 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 44,411 psi | 70% | 3074 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 80% | 42,757 psi | 67% | 3074 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 80% | 53,693 psi | 84% | 3238 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,663 psi | 83% | 3205 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,995 psi | 80% | 3196 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,547 psi | 81% | 3146 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,424 psi | 66% | 3071 fps | 97.6% |
| Somchem S361 | <<locked>> | 80% | 45,382 psi | 71% | 3054 fps | 96.5% |
| Somchem S365 | <<locked>> | 80% | 48,196 psi | 76% | 3163 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,279 psi | 68% | 3051 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 80% | 52,243 psi | 82% | 3209 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,608 psi | 59% | 2904 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 80% | 51,517 psi | 81% | 3209 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,148 psi | 66% | 3061 fps | 100% |
| Vihtavuori N560 | 93.4 gr | 80% | 41,495 psi | 65% | 3091 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 86% | 42,163 psi | 66% | 3084 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 92% | 46,195 psi | 72% | 3215 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 50,734 psi | 80% | 3350 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,822 psi | 81% | 3153 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,882 psi | 84% | 3297 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,172 psi | 55% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,697 psi | 62% | 2963 fps | 96.7% |
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 70 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Peregrine Glider (Glider GRM). Hodgdon Retumbo delivers the highest muzzle velocity at 3,501 fps; across all powders the maximum-charge window runs from 2,169 fps to 3,501 fps. ADI AR 2225 gives the best case fill at 100 %, and 70 of the 70 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 150.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-33, Hodgdon TrailBoss 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 | 150gr | 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.