Load Specifications
Load data in caliber 6.5 x 57 R with .264 | 120gr | Impala RNFP KO bullet and 28 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>> | 94% | 42,467 psi | 89% | 2703 fps | 96.6% |
| Accurate 4350 | <<locked>> | 84% | 41,655 psi | 87% | 2707 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 86% | 42,206 psi | 88% | 2753 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 42,264 psi | 88% | 2776 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 42,293 psi | 88% | 2776 fps | 99.5% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,076 psi | 88% | 2785 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 92% | 41,423 psi | 87% | 2822 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 42,148 psi | 88% | 2697 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 77% | 1804 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 43,221 psi | 90% | 2726 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 42,076 psi | 88% | 2641 fps | 96.9% |
| Lovex S070 | <<locked>> | 84% | 42,627 psi | 89% | 2671 fps | 95.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,308 psi | 90% | 2720 fps | 96.9% |
| Norma URP | <<locked>> | 84% | 40,799 psi | 85% | 2690 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 86% | 42,119 psi | 88% | 2730 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 78% | 1847 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 40,814 psi | 85% | 2717 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 42,424 psi | 89% | 2776 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 42,076 psi | 88% | 2641 fps | 96.9% |
| Shooters World SW4350 | <<locked>> | 84% | 42,627 psi | 89% | 2671 fps | 95.8% |
| Somchem S365 | <<locked>> | 88% | 41,930 psi | 88% | 2756 fps | 100% |
| Unknown powder | <<locked>> | 82% | 41,249 psi | 86% | 2690 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 84% | 42,221 psi | 88% | 2635 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 41,278 psi | 86% | 2661 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 82% | 42,105 psi | 88% | 2713 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 92% | 41,945 psi | 88% | 2756 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 41,539 psi | 87% | 2657 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 40,756 psi | 85% | 2864 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% | 37,492 psi | 78% | 2598 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 36,463 psi | 76% | 2592 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,447 psi | 74% | 2592 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,552 psi | 83% | 2717 fps | 99.1% |
| Alliant Reloder-23 | 40.4 gr | 82% | 28,369 psi | 59% | 2415 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,463 psi | 78% | 2674 fps | 95.4% |
| Alliant Reloder-26 | 46.5 gr | 86% | 34,026 psi | 71% | 2631 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,083 psi | 69% | 2493 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 57% | 1614 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 32,010 psi | 67% | 2464 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 39,653 psi | 83% | 2589 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 40,205 psi | 84% | 2618 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 38,421 psi | 80% | 2618 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 36,027 psi | 75% | 2579 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 84% | 39,450 psi | 82% | 2671 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 58% | 1650 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,897 psi | 75% | 2602 fps | 96.1% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 37,217 psi | 78% | 2654 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,653 psi | 83% | 2589 fps | 96.2% |
| Shooters World SW4350 | <<locked>> | 82% | 40,205 psi | 84% | 2618 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 32,706 psi | 68% | 2543 fps | 98.6% |
| Unknown powder | <<locked>> | 80% | 38,566 psi | 81% | 2631 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 37,536 psi | 78% | 2539 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 38,841 psi | 81% | 2612 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 80% | 39,392 psi | 82% | 2654 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 30,763 psi | 64% | 2490 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,521 psi | 76% | 2549 fps | 98.6% |
| Winchester StaBALL HD | 44.7 gr | 86% | 28,500 psi | 60% | 2493 fps | 95.6% |
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 28 powders for 6.5 x 57 R loaded with the .264 | 120gr | Impala RNFP KO. Winchester StaBALL HD delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,804 fps to 2,864 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 28 of the 28 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:9.0 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 | 120gr | Impala RNFP KO 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.