Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | Nosler CT FailSafe bullet and 51 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>> | 86% | 56,942 psi | 89% | 3045 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,211 psi | 76% | 2999 fps | 96.4% |
| Accurate High Country | <<locked>> | 82% | 55,027 psi | 86% | 3150 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 55,898 psi | 88% | 3156 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 82% | 54,099 psi | 85% | 3074 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,521 psi | 89% | 3153 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 55,738 psi | 87% | 3133 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,217 psi | 88% | 3261 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 96% | 55,013 psi | 86% | 3156 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,334 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,029 psi | 89% | 3146 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,376 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,912 psi | 88% | 3127 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,028 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,099 psi | 85% | 3166 fps | 98.2% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,070 psi | 85% | 3156 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,768 psi | 89% | 3110 fps | 98.8% |
| Bofors RP15 | <<locked>> | 88% | 56,434 psi | 88% | 3136 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,796 psi | 87% | 3150 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,029 psi | 89% | 3146 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,217 psi | 90% | 3153 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,390 psi | 87% | 3084 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,244 psi | 85% | 3064 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,288 psi | 87% | 3222 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,913 psi | 59% | 2005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,550 psi | 87% | 3058 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 55,129 psi | 86% | 3136 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,128 psi | 85% | 3136 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 55,274 psi | 87% | 3018 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,448 psi | 87% | 3159 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,246 psi | 90% | 3163 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,434 psi | 88% | 3159 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 54,984 psi | 86% | 3084 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,885 psi | 61% | 2051 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,144 psi | 88% | 3205 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,376 psi | 87% | 3173 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 54,520 psi | 85% | 3045 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,217 psi | 90% | 3117 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,140 psi | 79% | 3012 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,840 psi | 89% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,869 psi | 88% | 3035 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 57,450 psi | 90% | 3081 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,624 psi | 90% | 3071 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,898 psi | 89% | 3097 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 84% | 57,101 psi | 89% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,550 psi | 89% | 3169 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 54,128 psi | 85% | 3100 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 55,767 psi | 87% | 3176 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 94% | 57,276 psi | 90% | 3245 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,912 psi | 88% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,464 psi | 90% | 3081 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 46,572 psi | 73% | 2877 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 44,672 psi | 70% | 2930 fps | 95.3% |
| Accurate High Country | <<locked>> | 80% | 51,184 psi | 80% | 3081 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 48,544 psi | 76% | 3022 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 80% | 50,604 psi | 79% | 3015 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 45,803 psi | 72% | 2956 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 80% | 34,229 psi | 54% | 2684 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 92% | 45,034 psi | 71% | 3028 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 31,502 psi | 49% | 2651 fps | 97.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,444 psi | 79% | 3005 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,572 psi | 73% | 2963 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,353 psi | 71% | 2887 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,581 psi | 62% | 2831 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,011 psi | 82% | 3074 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 43,120 psi | 68% | 2946 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 46,601 psi | 73% | 3012 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,743 psi | 69% | 2861 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 43,410 psi | 68% | 2894 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 37,014 psi | 58% | 2769 fps | 97% |
| Bofors RP5 | <<locked>> | 80% | 46,572 psi | 73% | 2963 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 37,188 psi | 58% | 2766 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 80% | 48,254 psi | 76% | 2953 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,413 psi | 74% | 2936 fps | 98.6% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,580 psi | 60% | 2887 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,413 psi | 45% | 1795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,994 psi | 77% | 2940 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 44,570 psi | 70% | 2940 fps | 98.6% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,489 psi | 52% | 2694 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 40,132 psi | 63% | 2746 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,370 psi | 46% | 2592 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 49,690 psi | 78% | 3035 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,179 psi | 71% | 2959 fps | 99% |
| Ramshot Magnum | <<locked>> | 80% | 40,654 psi | 64% | 2822 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,211 psi | 46% | 1837 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,159 psi | 60% | 2864 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,884 psi | 59% | 2815 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 51,111 psi | 80% | 2986 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 80% | 50,169 psi | 79% | 2999 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,891 psi | 73% | 2949 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,835 psi | 78% | 2992 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 52,228 psi | 82% | 2972 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 50,459 psi | 79% | 2966 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,324 psi | 69% | 2841 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 49,792 psi | 78% | 2972 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 50,111 psi | 79% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,182 psi | 77% | 3035 fps | 99% |
| Vihtavuori N565 | <<locked>> | 80% | 41,176 psi | 65% | 2844 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 39,001 psi | 61% | 2835 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 88% | 46,122 psi | 72% | 3031 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,614 psi | 70% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,702 psi | 73% | 2897 fps | 99.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 58 powders for .30-378 Weath. Mag. loaded with the .308 | 180gr | Nosler CT FailSafe. ADI AR 2218 delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,261 fps. Accurate 8700 gives the best case fill at 100 %, and 58 of the 58 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 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, Hodgdon US 869, Lovex D100, Ramshot LRT 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.