Load Specifications
Load data in caliber 6.5 x 57 R with .264 | 139gr | Fox Classic Hunter bullet and 39 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Alliant Reloder-23.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 42,786 psi | 89% | 2552 fps | 98.1% |
| Accurate 4350 | <<locked>> | 86% | 41,858 psi | 87% | 2549 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 86% | 40,843 psi | 85% | 2559 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 82% | 40,683 psi | 85% | 2575 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 40,756 psi | 85% | 2579 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,654 psi | 85% | 2602 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 42,380 psi | 89% | 2680 fps | 99.2% |
| Bofors RP7 | <<locked>> | 82% | 41,191 psi | 86% | 2461 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 82% | 42,366 psi | 89% | 2562 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 40,727 psi | 85% | 2503 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 40,567 psi | 85% | 2556 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 75% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 41,800 psi | 87% | 2497 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,656 psi | 89% | 2490 fps | 96.9% |
| IMR 4831 | <<locked>> | 90% | 41,220 psi | 86% | 2523 fps | 99.1% |
| Lovex S065 | <<locked>> | 84% | 42,554 psi | 89% | 2493 fps | 98.2% |
| Lovex S070 | <<locked>> | 84% | 40,524 psi | 85% | 2470 fps | 96.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,683 psi | 85% | 2513 fps | 97.6% |
| Norma MRP | <<locked>> | 94% | 42,337 psi | 88% | 2641 fps | 97% |
| Norma URP | <<locked>> | 86% | 41,872 psi | 87% | 2546 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 43,279 psi | 90% | 2589 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 76% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 41,829 psi | 87% | 2572 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 40,901 psi | 85% | 2582 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 82% | 41,191 psi | 86% | 2461 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 42,554 psi | 89% | 2493 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 84% | 40,524 psi | 85% | 2470 fps | 96.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 41,989 psi | 88% | 2444 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 43,265 psi | 90% | 2602 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 42,699 psi | 89% | 2546 fps | 96.5% |
| Unknown powder | <<locked>> | 84% | 42,453 psi | 89% | 2549 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 86% | 42,931 psi | 90% | 2480 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 42,496 psi | 89% | 2523 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 98% | 43,105 psi | 90% | 2543 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 84% | 42,815 psi | 89% | 2562 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 94% | 42,598 psi | 89% | 2602 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 42,728 psi | 89% | 2516 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 42,366 psi | 89% | 2562 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,727 psi | 87% | 2726 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 34,635 psi | 72% | 2388 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 34,040 psi | 71% | 2385 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,866 psi | 71% | 2402 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,942 psi | 79% | 2516 fps | 99.6% |
| Alliant Reloder-23 | 38.4 gr | 82% | 26,020 psi | 54% | 2211 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,460 psi | 70% | 2431 fps | 95.7% |
| Alliant Reloder-26 | 44.2 gr | 86% | 31,749 psi | 66% | 2431 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 38,479 psi | 80% | 2405 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,523 psi | 83% | 2503 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,140 psi | 65% | 2300 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 82% | 37,913 psi | 79% | 2497 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 56% | 1480 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 39,073 psi | 82% | 2441 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,176 psi | 84% | 2441 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 29,718 psi | 62% | 2264 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 37,449 psi | 78% | 2388 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 35,592 psi | 74% | 2365 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 33,417 psi | 70% | 2359 fps | 95.3% |
| Norma MRP | <<locked>> | 90% | 36,869 psi | 77% | 2523 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,040 psi | 71% | 2382 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 82% | 35,476 psi | 74% | 2425 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 57% | 1512 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,779 psi | 71% | 2402 fps | 96.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 33,098 psi | 69% | 2402 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 38,479 psi | 80% | 2405 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,449 psi | 78% | 2388 fps | 97% |
| Shooters World SW4350 | <<locked>> | 80% | 35,592 psi | 74% | 2365 fps | 95.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,564 psi | 76% | 2336 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 30,487 psi | 64% | 2339 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 39,856 psi | 83% | 2490 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 37,115 psi | 78% | 2441 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 35,462 psi | 74% | 2339 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 36,912 psi | 77% | 2415 fps | 98% |
| Vihtavuori N165 | <<locked>> | 96% | 40,466 psi | 85% | 2493 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 37,565 psi | 78% | 2457 fps | 98% |
| Vihtavuori N555 | <<locked>> | 82% | 28,137 psi | 59% | 2277 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,969 psi | 73% | 2365 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 39,523 psi | 83% | 2503 fps | 96.3% |
| Winchester StaBALL HD | 42.5 gr | 86% | 26,020 psi | 54% | 2293 fps | 96.3% |
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 39 powders for 6.5 x 57 R loaded with the .264 | 139gr | Fox Classic Hunter. Winchester StaBALL HD delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,726 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 39 of the 39 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, Lovex S071 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. Alliant Reloder-26, Winchester StaBALL HD, Alliant Reloder-23 rank at the top here: for 6.5 x 57 R with the .264 | 139gr | Fox Classic Hunter 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.