Load Specifications
Load data in caliber .50 BMG with .510 | 420gr | Impala LW CFN bullet and 41 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 Winchester StaBALL HD.
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: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 47,471 psi | 88% | 3107 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 86% | 48,385 psi | 90% | 3241 fps | 96.5% |
| ADI AR 2209 | <<locked>> | 84% | 47,819 psi | 89% | 3179 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 86% | 45,934 psi | 86% | 3173 fps | 97% |
| ADI AR 2217 | <<locked>> | 96% | 47,558 psi | 89% | 3196 fps | 97.7% |
| ADI AR 2225 | <<locked>> | 98% | 46,050 psi | 86% | 3232 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 84% | 47,834 psi | 89% | 3173 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 46,557 psi | 87% | 3186 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 47,877 psi | 89% | 3176 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 47,311 psi | 88% | 3232 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 47,369 psi | 88% | 3251 fps | 100% |
| Bofors RP15 | <<locked>> | 88% | 46,137 psi | 86% | 3176 fps | 98.1% |
| Bofors RP30 | <<locked>> | 94% | 47,239 psi | 88% | 3225 fps | 97.9% |
| Bofors RP5 | <<locked>> | 86% | 46,557 psi | 87% | 3186 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 92% | 45,643 psi | 85% | 3159 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 84% | 45,876 psi | 85% | 3107 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 48,051 psi | 90% | 3156 fps | 96.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 46,296 psi | 86% | 3294 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 70% | 2113 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 47,181 psi | 88% | 3100 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 88% | 47,413 psi | 88% | 3215 fps | 97.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,802 psi | 83% | 3196 fps | 97.3% |
| Lovex S071 | <<locked>> | 90% | 46,137 psi | 86% | 3081 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 45,150 psi | 84% | 3225 fps | 99.2% |
| Norma MRP | <<locked>> | 84% | 46,122 psi | 86% | 3205 fps | 99.2% |
| Ramshot Grand | <<locked>> | 88% | 47,703 psi | 89% | 3235 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 46,383 psi | 86% | 3166 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 72% | 2162 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 46,325 psi | 86% | 3278 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,527 psi | 85% | 3222 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 82% | 46,108 psi | 86% | 3087 fps | 97% |
| Rottweil R 905 | <<locked>> | 84% | 47,485 psi | 88% | 3163 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 47,094 psi | 88% | 3156 fps | 98.4% |
| Somchem S361 | <<locked>> | 82% | 47,239 psi | 88% | 3074 fps | 96.6% |
| Somchem S385 | <<locked>> | 84% | 48,283 psi | 90% | 3140 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 47,703 psi | 89% | 3114 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 84% | 47,340 psi | 88% | 3159 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 45,890 psi | 86% | 3189 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 90% | 46,746 psi | 87% | 3182 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 88% | 45,252 psi | 84% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 47,398 psi | 88% | 3120 fps | 98.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,247 psi | 73% | 2933 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 84% | 45,194 psi | 84% | 3169 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 42,047 psi | 78% | 3051 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 40,408 psi | 75% | 3041 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 90% | 39,363 psi | 73% | 3002 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 31,879 psi | 59% | 2844 fps | 95.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,206 psi | 79% | 3048 fps | 97.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,406 psi | 72% | 2992 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,086 psi | 69% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,503 psi | 61% | 2864 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,060 psi | 77% | 3117 fps | 99.8% |
| Bofors RP15 | <<locked>> | 80% | 35,911 psi | 67% | 2927 fps | 95% |
| Bofors RP30 | <<locked>> | 88% | 38,899 psi | 72% | 3035 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 38,406 psi | 72% | 2992 fps | 96.1% |
| Hodgdon H1000 | <<locked>> | 86% | 37,681 psi | 70% | 2963 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 82% | 42,960 psi | 80% | 3045 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,235 psi | 79% | 3028 fps | 95.1% |
| Hodgdon Retumbo | 228 gr | 84% | 35,926 psi | 67% | 3015 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 53% | 1893 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,727 psi | 78% | 2979 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 84% | 41,655 psi | 78% | 3084 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,566 psi | 74% | 3071 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 34,214 psi | 64% | 2805 fps | 97.3% |
| Norma 217 | <<locked>> | 90% | 32,996 psi | 61% | 2910 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 40,263 psi | 75% | 3074 fps | 98.1% |
| Ramshot Grand | <<locked>> | 82% | 38,827 psi | 72% | 3025 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 82% | 35,230 psi | 66% | 2900 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 54% | 1939 fps | 100% |
| ReloadSwiss RS 76 | 238.3 gr | 82% | 33,141 psi | 62% | 2920 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,453 psi | 79% | 3150 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 43,352 psi | 81% | 3025 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 41,785 psi | 78% | 3038 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,495 psi | 77% | 3031 fps | 97.1% |
| Somchem S361 | <<locked>> | 80% | 44,309 psi | 83% | 3009 fps | 95.8% |
| Somchem S385 | <<locked>> | 80% | 42,598 psi | 79% | 3018 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 80% | 37,072 psi | 69% | 2877 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 80% | 41,785 psi | 78% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 42,888 psi | 80% | 3120 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 86% | 41,118 psi | 77% | 3058 fps | 95.4% |
| Winchester StaBALL HD | 223.1 gr | 80% | 33,562 psi | 63% | 2999 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,928 psi | 73% | 2933 fps | 96.2% |
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 48 powders for .50 BMG loaded with the .510 | 420gr | Impala LW CFN. Hodgdon Retumbo delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 2,113 fps to 3,294 fps. ADI AR 2218 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (370 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. ADI AR 2218, Alliant Reloder-50, 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, Winchester StaBALL HD rank at the top here: for .50 BMG with the .510 | 420gr | Impala LW CFN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-33, Alliant Reloder-50 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.