Load Specifications
Load data in caliber 6.5 x 57 R with .263 | 140gr | Prvi Partizan PSP bullet and 34 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and ReloadSwiss RS 76.
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>> | 92% | 42,351 psi | 88% | 2546 fps | 98.4% |
| Accurate 4350 | <<locked>> | 82% | 41,147 psi | 86% | 2533 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 42,409 psi | 89% | 2592 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,250 psi | 88% | 2612 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 42,699 psi | 89% | 2615 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 42,540 psi | 89% | 2648 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 41,684 psi | 87% | 2667 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 42,250 psi | 88% | 2612 fps | 96% |
| Hodgdon H4350 | <<locked>> | 82% | 42,351 psi | 88% | 2523 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 42,525 psi | 89% | 2533 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,524 psi | 87% | 2671 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 82% | 41,974 psi | 88% | 2592 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 77% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 43,105 psi | 90% | 2526 fps | 97.1% |
| IMR 4831 | <<locked>> | 88% | 43,062 psi | 90% | 2556 fps | 99.5% |
| Lovex S070 | <<locked>> | 82% | 41,945 psi | 88% | 2503 fps | 97.6% |
| Lovex S071 | <<locked>> | 98% | 43,192 psi | 90% | 2559 fps | 98.5% |
| Norma MRP | <<locked>> | 90% | 41,321 psi | 86% | 2621 fps | 97.2% |
| Norma URP | <<locked>> | 82% | 40,611 psi | 85% | 2523 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 84% | 42,221 psi | 88% | 2569 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 94% | 43,236 psi | 90% | 2618 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,260 psi | 78% | 1722 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 40,901 psi | 85% | 2552 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 42,366 psi | 89% | 2618 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,133 psi | 86% | 2661 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 82% | 41,945 psi | 88% | 2503 fps | 97.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 43,091 psi | 90% | 2470 fps | 97.7% |
| Somchem S365 | <<locked>> | 86% | 42,540 psi | 89% | 2585 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 41,640 psi | 87% | 2530 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 82% | 41,611 psi | 87% | 2457 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 42,395 psi | 89% | 2536 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 90% | 42,308 psi | 88% | 2592 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 41,350 psi | 86% | 2493 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 41,046 psi | 86% | 2713 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>> | 84% | 32,314 psi | 68% | 2329 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 38,464 psi | 80% | 2480 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,289 psi | 78% | 2484 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,624 psi | 83% | 2556 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,441 psi | 57% | 2257 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,009 psi | 65% | 2369 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 29,153 psi | 61% | 2356 fps | 95.1% |
| Bofors RP5 | <<locked>> | 90% | 39,624 psi | 83% | 2556 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 80% | 39,755 psi | 83% | 2470 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,780 psi | 73% | 2382 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,044 psi | 82% | 2612 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 39,175 psi | 82% | 2533 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 57% | 1499 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 37,826 psi | 79% | 2418 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 33,402 psi | 70% | 2352 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 39,421 psi | 82% | 2451 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 33,634 psi | 70% | 2362 fps | 95.8% |
| Norma MRP | 45.7 gr | 86% | 36,100 psi | 75% | 2507 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,058 psi | 80% | 2470 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 80% | 36,927 psi | 77% | 2461 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 92% | 39,885 psi | 83% | 2552 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 58% | 1539 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,043 psi | 79% | 2493 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,854 psi | 77% | 2500 fps | 97.9% |
| ReloadSwiss RS 76 | 52.6 gr | 96% | 38,348 psi | 80% | 2595 fps | 96.2% |
| Shooters World SW4350 | <<locked>> | 80% | 39,421 psi | 82% | 2451 fps | 96.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,205 psi | 84% | 2415 fps | 97% |
| Somchem S365 | <<locked>> | 80% | 34,490 psi | 72% | 2428 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,666 psi | 77% | 2425 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 39,262 psi | 82% | 2415 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 39,740 psi | 83% | 2484 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 30,356 psi | 63% | 2329 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,595 psi | 81% | 2441 fps | 99.9% |
| Winchester StaBALL HD | 42.1 gr | 80% | 24,221 psi | 51% | 2228 fps | 95.5% |
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 58 powders for 6.5 x 57 R loaded with the .263 | 140gr | Prvi Partizan PSP. Winchester StaBALL HD delivers the highest muzzle velocity at 2,713 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,713 fps. ADI AR 2217 gives the best case fill at 100 %, and 58 of the 58 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.263" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Winchester StaBALL HD, Norma MRP, ReloadSwiss RS 76 rank at the top here: for 6.5 x 57 R with the .263 | 140gr | Prvi Partizan PSP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, ADI AR 2217 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.