Load Specifications
Load data in caliber 6.5 x 57 with .263 | 139gr | Prvi Partizan SP BT bullet and 68 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 48,051 psi | 85% | 2651 fps | 99.2% |
| Accurate 4350 | <<locked>> | 88% | 49,966 psi | 88% | 2694 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 49,008 psi | 87% | 2779 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 50,024 psi | 88% | 2628 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 50,937 psi | 90% | 2733 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 96% | 48,617 psi | 86% | 2723 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 51,184 psi | 90% | 2736 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 50,575 psi | 89% | 2651 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 51,140 psi | 90% | 2753 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 48,356 psi | 85% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 50,560 psi | 89% | 2726 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 47,732 psi | 84% | 2723 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 48,298 psi | 85% | 2720 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,049 psi | 80% | 2707 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 47,877 psi | 85% | 2792 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,125 psi | 89% | 2766 fps | 97.7% |
| Bofors RP3 | <<locked>> | 82% | 51,010 psi | 90% | 2661 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 47,732 psi | 84% | 2723 fps | 97.4% |
| Bofors RP7 | <<locked>> | 86% | 50,691 psi | 90% | 2648 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 86% | 48,950 psi | 87% | 2694 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 84% | 48,921 psi | 86% | 2654 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,010 psi | 90% | 2710 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 51,111 psi | 90% | 2680 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,932 psi | 78% | 2733 fps | 97% |
| Hodgdon Superformance | <<locked>> | 86% | 48,312 psi | 85% | 2720 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 65% | 1690 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 48,501 psi | 86% | 2631 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 49,211 psi | 87% | 2628 fps | 98.6% |
| IMR 4831 | <<locked>> | 90% | 50,821 psi | 90% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,633 psi | 90% | 2671 fps | 96% |
| IMR 7828 SSC | <<locked>> | 98% | 49,574 psi | 88% | 2753 fps | 96.3% |
| Lovex S065 | <<locked>> | 86% | 49,429 psi | 87% | 2628 fps | 99.5% |
| Lovex S070 | <<locked>> | 88% | 50,256 psi | 89% | 2661 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,847 psi | 81% | 2615 fps | 98.9% |
| Norma 204 | <<locked>> | 88% | 48,631 psi | 86% | 2674 fps | 97.1% |
| Norma MRP | <<locked>> | 96% | 50,502 psi | 89% | 2802 fps | 99% |
| Norma URP | <<locked>> | 88% | 48,979 psi | 87% | 2680 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,937 psi | 88% | 2772 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 90% | 50,981 psi | 90% | 2733 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,819 psi | 85% | 2710 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 66% | 1729 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 47,819 psi | 85% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 49,908 psi | 88% | 2720 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 48,414 psi | 86% | 2740 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,816 psi | 77% | 2726 fps | 98% |
| Rottweil R 903 | <<locked>> | 84% | 51,184 psi | 90% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 49,458 psi | 87% | 2657 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 94% | 49,603 psi | 88% | 2710 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 86% | 50,691 psi | 90% | 2648 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 49,429 psi | 87% | 2628 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 50,256 psi | 89% | 2661 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 49,182 psi | 87% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 49,197 psi | 87% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 48,617 psi | 86% | 2575 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 49,168 psi | 87% | 2707 fps | 97.6% |
| Somchem S355 | <<locked>> | 82% | 48,356 psi | 85% | 2612 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 48,298 psi | 85% | 2690 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 50,328 psi | 89% | 2690 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 84% | 49,110 psi | 87% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 50,865 psi | 90% | 2677 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 49,487 psi | 87% | 2667 fps | 98% |
| Vihtavuori N550 | <<locked>> | 88% | 50,154 psi | 89% | 2684 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 51,010 psi | 90% | 2746 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 50,836 psi | 90% | 2792 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 50,125 psi | 89% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 48,950 psi | 87% | 2694 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,746 psi | 83% | 2835 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 50,024 psi | 88% | 2680 fps | 97.6% |
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>> | 84% | 32,082 psi | 57% | 2333 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 38,218 psi | 68% | 2480 fps | 98.7% |
| Accurate High Country | 48.9 gr | 92% | 45,629 psi | 81% | 2717 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 47,007 psi | 83% | 2579 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,032 psi | 74% | 2572 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 94% | 45,585 psi | 81% | 2667 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,047 psi | 74% | 2569 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,485 psi | 84% | 2602 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,072 psi | 66% | 2490 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,148 psi | 75% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,611 psi | 74% | 2562 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,974 psi | 74% | 2615 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,267 psi | 48% | 2257 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,764 psi | 58% | 2425 fps | 95.9% |
| Alliant Reloder-26 | 44.9 gr | 82% | 31,067 psi | 55% | 2421 fps | 96.1% |
| Bofors RP15 | <<locked>> | 94% | 41,408 psi | 73% | 2602 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 47,834 psi | 85% | 2612 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,974 psi | 74% | 2615 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,032 psi | 74% | 2493 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 80% | 39,958 psi | 71% | 2523 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 42,931 psi | 76% | 2543 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 47,834 psi | 85% | 2657 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,563 psi | 61% | 2385 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,249 psi | 73% | 2674 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 38,928 psi | 69% | 2533 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 48% | 1506 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 37,623 psi | 67% | 2421 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,511 psi | 77% | 2523 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 36,622 psi | 65% | 2434 fps | 98.4% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,587 psi | 84% | 2618 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 46,441 psi | 82% | 2697 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 41,060 psi | 73% | 2477 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,204 psi | 69% | 2454 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 33,402 psi | 59% | 2365 fps | 95.7% |
| Norma 204 | <<locked>> | 84% | 42,511 psi | 75% | 2559 fps | 95.6% |
| Norma MRP | 45.7 gr | 86% | 35,853 psi | 63% | 2507 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 37,826 psi | 67% | 2474 fps | 98.5% |
| Ramshot Grand | <<locked>> | 96% | 46,383 psi | 82% | 2707 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,709 psi | 65% | 2461 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 38,319 psi | 68% | 2526 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 49% | 1545 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,744 psi | 79% | 2661 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,782 psi | 67% | 2497 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,622 psi | 65% | 2503 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,087 psi | 67% | 2595 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 45,034 psi | 80% | 2562 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,412 psi | 82% | 2602 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 40,770 psi | 72% | 2546 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 42,032 psi | 74% | 2493 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,060 psi | 73% | 2477 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 80% | 39,204 psi | 69% | 2454 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,195 psi | 82% | 2615 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,137 psi | 82% | 2467 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,001 psi | 71% | 2418 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,393 psi | 71% | 2543 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 45,426 psi | 80% | 2562 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 34,243 psi | 61% | 2431 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 38,841 psi | 69% | 2480 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 43,250 psi | 76% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,378 psi | 70% | 2474 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,247 psi | 68% | 2461 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 38,595 psi | 68% | 2474 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,139 psi | 53% | 2333 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 47,718 psi | 84% | 2736 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,377 psi | 68% | 2444 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,219 psi | 71% | 2530 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,076 psi | 43% | 2228 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,741 psi | 72% | 2516 fps | 95.2% |
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 68 powders for 6.5 x 57 loaded with the .263 | 139gr | Prvi Partizan SP BT. Winchester StaBALL HD delivers the highest muzzle velocity at 2,835 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,835 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 68 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.263" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Bofors RP15, Hodgdon Retumbo 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, Accurate High Country, Norma MRP rank at the top here: for 6.5 x 57 with the .263 | 139gr | Prvi Partizan SP BT 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.