Load Specifications
Load data in caliber .50 BMG with .510 | 450gr | Swift A-Frame bullet and 43 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 N568.
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% | 45,672 psi | 85% | 3002 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 86% | 47,427 psi | 88% | 3150 fps | 97% |
| ADI AR 2209 | <<locked>> | 84% | 47,195 psi | 88% | 3091 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 88% | 48,457 psi | 90% | 3153 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 96% | 46,847 psi | 87% | 3114 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,269 psi | 90% | 3205 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 47,065 psi | 88% | 3081 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 45,629 psi | 85% | 3091 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 88% | 46,978 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 46,499 psi | 87% | 3140 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 46,369 psi | 86% | 3150 fps | 100% |
| Bofors RP15 | <<locked>> | 90% | 48,298 psi | 90% | 3143 fps | 99% |
| Bofors RP30 | <<locked>> | 94% | 46,224 psi | 86% | 3130 fps | 98.3% |
| Bofors RP5 | <<locked>> | 86% | 45,629 psi | 85% | 3091 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 94% | 48,066 psi | 90% | 3140 fps | 99% |
| Hodgdon H4831 | <<locked>> | 86% | 48,225 psi | 90% | 3087 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,340 psi | 88% | 3068 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 47,718 psi | 89% | 3022 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 45,469 psi | 85% | 3202 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 69% | 2047 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,441 psi | 87% | 3018 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 88% | 46,702 psi | 87% | 3130 fps | 98% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,729 psi | 81% | 3100 fps | 97.7% |
| Lovex S071 | <<locked>> | 92% | 47,253 psi | 88% | 3035 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 44,092 psi | 82% | 3130 fps | 99.4% |
| Norma MRP | <<locked>> | 86% | 48,472 psi | 90% | 3173 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 46,963 psi | 88% | 3146 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 90% | 45,484 psi | 85% | 3074 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,116 psi | 71% | 2093 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 45,397 psi | 85% | 3186 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 48,037 psi | 90% | 3202 fps | 97.5% |
| Rottweil R 904 | <<locked>> | 84% | 48,312 psi | 90% | 3061 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 84% | 46,514 psi | 87% | 3068 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 46,151 psi | 86% | 3064 fps | 98.8% |
| Somchem S361 | <<locked>> | 82% | 46,282 psi | 86% | 2986 fps | 97.1% |
| Somchem S385 | <<locked>> | 84% | 47,079 psi | 88% | 3045 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 46,746 psi | 87% | 3025 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 84% | 45,861 psi | 85% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 48,269 psi | 90% | 3166 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 90% | 45,455 psi | 85% | 3087 fps | 97.4% |
| Vihtavuori N568 | <<locked>> | 94% | 45,716 psi | 85% | 3140 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 48,066 psi | 90% | 3215 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 46,485 psi | 87% | 3028 fps | 98.7% |
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% | 37,231 psi | 69% | 2822 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 82% | 41,104 psi | 77% | 3009 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 41,162 psi | 77% | 2963 fps | 97.5% |
| ADI AR 2213 | <<locked>> | 82% | 39,407 psi | 73% | 2949 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 90% | 38,276 psi | 71% | 2913 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 86% | 30,356 psi | 57% | 2743 fps | 95.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,220 psi | 77% | 2956 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,173 psi | 69% | 2897 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,810 psi | 67% | 2851 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,009 psi | 58% | 2756 fps | 97.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,769 psi | 74% | 3012 fps | 99.9% |
| Bofors RP15 | <<locked>> | 80% | 34,548 psi | 64% | 2822 fps | 95.3% |
| Bofors RP30 | <<locked>> | 88% | 37,550 psi | 70% | 2933 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 37,173 psi | 69% | 2897 fps | 96.5% |
| Hodgdon H1000 | <<locked>> | 86% | 36,477 psi | 68% | 2871 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,276 psi | 73% | 2890 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,336 psi | 77% | 2940 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,657 psi | 83% | 2966 fps | 100% |
| Hodgdon Retumbo | 222.6 gr | 82% | 32,401 psi | 60% | 2844 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 52% | 1834 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,828 psi | 76% | 2894 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 82% | 38,014 psi | 71% | 2927 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,218 psi | 71% | 2969 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 32,082 psi | 60% | 2687 fps | 97.2% |
| Norma 217 | <<locked>> | 90% | 31,270 psi | 58% | 2799 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 39,059 psi | 73% | 2969 fps | 98.3% |
| Ramshot Grand | <<locked>> | 82% | 37,681 psi | 70% | 2933 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 80% | 31,357 psi | 58% | 2733 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 53% | 1877 fps | 100% |
| ReloadSwiss RS 76 | 238.3 gr | 82% | 31,546 psi | 59% | 2815 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,249 psi | 77% | 3051 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 42,453 psi | 79% | 2940 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 40,654 psi | 76% | 2943 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,321 psi | 75% | 2936 fps | 97.5% |
| Somchem S361 | <<locked>> | 80% | 43,236 psi | 81% | 2923 fps | 96.3% |
| Somchem S385 | <<locked>> | 80% | 41,220 psi | 77% | 2920 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 80% | 35,766 psi | 67% | 2782 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 80% | 40,132 psi | 75% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,073 psi | 73% | 2959 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 86% | 39,624 psi | 74% | 2953 fps | 95.7% |
| Vihtavuori N568 | 260.6 gr | 92% | 42,554 psi | 79% | 3068 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,372 psi | 60% | 2887 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,695 psi | 70% | 2838 fps | 96.6% |
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 49 powders for .50 BMG loaded with the .510 | 450gr | Swift A-Frame. Winchester StaBALL HD delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 2,047 fps to 3,215 fps. ADI AR 2218 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (370 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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 N568 rank at the top here: for .50 BMG with the .510 | 450gr | Swift A-Frame 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.