Load Specifications
Load data in caliber 6.5 x 57 R with .264 | 121gr | SUS-TAC LRT 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, Somchem S365 and Vihtavuori N555.
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>> | 98% | 41,539 psi | 87% | 2690 fps | 96.2% |
| Accurate 4350 | <<locked>> | 88% | 40,712 psi | 85% | 2687 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 42,902 psi | 90% | 2664 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,815 psi | 89% | 2688 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 42,496 psi | 89% | 2762 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,409 psi | 89% | 2784 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,583 psi | 89% | 2774 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,002 psi | 86% | 2818 fps | 97.6% |
| Bofors RP3 | <<locked>> | 82% | 42,554 psi | 89% | 2691 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,163 psi | 88% | 2704 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 76% | 1773 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 41,872 psi | 87% | 2625 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 42,380 psi | 89% | 2716 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 41,814 psi | 87% | 2642 fps | 96.7% |
| Norma URP | <<locked>> | 88% | 40,466 psi | 85% | 2692 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 90% | 42,061 psi | 88% | 2733 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 76% | 1815 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,221 psi | 88% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 43,265 psi | 90% | 2774 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,656 psi | 89% | 2783 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 84% | 42,743 psi | 89% | 2689 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,814 psi | 87% | 2642 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,220 psi | 86% | 2689 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,366 psi | 89% | 2572 fps | 100% |
| Somchem S355 | <<locked>> | 82% | 40,886 psi | 85% | 2642 fps | 99.1% |
| Somchem S365 | <<locked>> | 92% | 41,626 psi | 87% | 2759 fps | 99.9% |
| Unknown powder | <<locked>> | 86% | 41,118 psi | 86% | 2695 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 88% | 41,989 psi | 88% | 2638 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 86% | 41,423 psi | 87% | 2672 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 86% | 41,814 psi | 87% | 2714 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 96% | 40,596 psi | 85% | 2740 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,076 psi | 88% | 2671 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,753 psi | 79% | 2789 fps | 99.5% |
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>> | 96% | 38,464 psi | 80% | 2631 fps | 95.3% |
| Accurate 4350 | <<locked>> | 82% | 32,982 psi | 69% | 2510 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 40,118 psi | 84% | 2606 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,016 psi | 84% | 2632 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,156 psi | 69% | 2536 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,621 psi | 72% | 2605 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,906 psi | 60% | 2443 fps | 95.1% |
| Alliant Reloder-26 | 47.3 gr | 92% | 35,534 psi | 74% | 2683 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 40,001 psi | 84% | 2641 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,587 psi | 60% | 2380 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 56% | 1585 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,392 psi | 82% | 2575 fps | 98% |
| IMR 4831 | <<locked>> | 86% | 33,040 psi | 69% | 2508 fps | 95.4% |
| Lovex S065 | <<locked>> | 82% | 37,115 psi | 78% | 2540 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 33,315 psi | 70% | 2525 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 88% | 39,639 psi | 83% | 2681 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,919 psi | 56% | 1620 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,854 psi | 77% | 2671 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,099 psi | 73% | 2597 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 37,362 psi | 78% | 2661 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 37,449 psi | 78% | 2581 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,115 psi | 78% | 2540 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,479 psi | 80% | 2632 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,813 psi | 83% | 2525 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,203 psi | 80% | 2585 fps | 98.6% |
| Somchem S365 | 38.1 gr | 80% | 28,050 psi | 59% | 2423 fps | 96.7% |
| Unknown powder | <<locked>> | 82% | 36,085 psi | 75% | 2582 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 32,721 psi | 68% | 2439 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,692 psi | 70% | 2500 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 34,345 psi | 72% | 2546 fps | 95.4% |
| Vihtavuori N555 | 41.3 gr | 88% | 31,241 psi | 65% | 2521 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,285 psi | 67% | 2451 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,906 psi | 60% | 2519 fps | 95.7% |
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 | 121gr | SUS-TAC LRT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,773 fps to 2,818 fps. Alliant Reloder-23 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 76–90 %, leaving at least 10 % headroom. The 121.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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, Somchem S365, Vihtavuori N555 rank at the top here: for 6.5 x 57 R with the .264 | 121gr | SUS-TAC LRT 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.