Load Specifications
Load data in caliber 6.5 x 57 R with .264 | 125gr | Hasler ARIETE bullet and 33 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 41,118 psi | 86% | 2641 fps | 96.6% |
| Accurate 4350 | <<locked>> | 88% | 43,308 psi | 90% | 2707 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 41,930 psi | 88% | 2710 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 41,916 psi | 88% | 2730 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 41,611 psi | 87% | 2723 fps | 99.6% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,044 psi | 82% | 2680 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 40,379 psi | 84% | 2762 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 41,669 psi | 87% | 2651 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,013 psi | 75% | 1755 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,265 psi | 90% | 2598 fps | 96.1% |
| IMR 4831 | <<locked>> | 92% | 42,250 psi | 88% | 2667 fps | 98.5% |
| Lovex S065 | <<locked>> | 84% | 41,263 psi | 86% | 2589 fps | 96.9% |
| Lovex S070 | <<locked>> | 86% | 41,800 psi | 87% | 2621 fps | 95.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,160 psi | 82% | 2605 fps | 96% |
| Norma URP | <<locked>> | 88% | 42,873 psi | 90% | 2694 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 41,771 psi | 87% | 2684 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,535 psi | 76% | 1795 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 41,727 psi | 87% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 42,844 psi | 90% | 2720 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 42,250 psi | 88% | 2736 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 82% | 42,322 psi | 88% | 2635 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 41,263 psi | 86% | 2589 fps | 96.9% |
| Shooters World SW4350 | <<locked>> | 86% | 41,800 psi | 87% | 2621 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 43,279 psi | 90% | 2684 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 42,931 psi | 90% | 2638 fps | 99.6% |
| Somchem S365 | <<locked>> | 90% | 41,263 psi | 86% | 2703 fps | 100% |
| Unknown powder | <<locked>> | 84% | 40,683 psi | 85% | 2641 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 86% | 41,495 psi | 87% | 2585 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 84% | 40,944 psi | 86% | 2618 fps | 98% |
| Vihtavuori N550 | <<locked>> | 84% | 41,350 psi | 86% | 2661 fps | 98% |
| Vihtavuori N555 | <<locked>> | 94% | 40,611 psi | 85% | 2694 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 41,365 psi | 86% | 2615 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,813 psi | 83% | 2805 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>> | 94% | 38,363 psi | 80% | 2585 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 32,663 psi | 68% | 2470 fps | 95.6% |
| Alliant Reloder-16 | 38.1 gr | 80% | 32,605 psi | 68% | 2480 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,666 psi | 77% | 2612 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,674 psi | 60% | 2398 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,637 psi | 77% | 2621 fps | 95.5% |
| Alliant Reloder-26 | 47.3 gr | 90% | 35,114 psi | 73% | 2631 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,211 psi | 63% | 2388 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 56% | 1568 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,828 psi | 85% | 2549 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 32,866 psi | 69% | 2461 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 36,492 psi | 76% | 2487 fps | 95.4% |
| Lovex S070 | <<locked>> | 84% | 39,436 psi | 82% | 2569 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 36,521 psi | 76% | 2546 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 32,880 psi | 69% | 2470 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 86% | 39,146 psi | 82% | 2628 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 57% | 1601 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,030 psi | 82% | 2677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,401 psi | 68% | 2484 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 34,301 psi | 72% | 2543 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 39,552 psi | 83% | 2579 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,492 psi | 76% | 2487 fps | 95.4% |
| Shooters World SW4350 | <<locked>> | 84% | 39,436 psi | 82% | 2569 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,538 psi | 85% | 2631 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 40,190 psi | 84% | 2585 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 29,501 psi | 62% | 2425 fps | 97.8% |
| Unknown powder | <<locked>> | 80% | 35,505 psi | 74% | 2526 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 34,330 psi | 72% | 2434 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 35,795 psi | 75% | 2510 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 36,245 psi | 76% | 2546 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 86% | 31,241 psi | 65% | 2477 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,750 psi | 71% | 2451 fps | 98.1% |
| Winchester StaBALL HD | 45.5 gr | 90% | 28,805 psi | 60% | 2484 fps | 96.4% |
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 33 powders for 6.5 x 57 R loaded with the .264 | 125gr | Hasler ARIETE. Winchester StaBALL HD delivers the highest muzzle velocity at 2,805 fps; across all powders the maximum-charge window runs from 1,755 fps to 2,805 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 33 of the 33 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 125.0 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, Alliant Reloder-16, Winchester StaBALL HD rank at the top here: for 6.5 x 57 R with the .264 | 125gr | Hasler ARIETE 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.