Load Specifications
Load data in caliber 6.5 x 55 Swedish with .263 | 139gr | Prvi Partizan FMJ BT bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and ReloadSwiss RS 70.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 49,023 psi | 89% | 2657 fps | 99.3% |
| Accurate 4350 | <<locked>> | 88% | 47,805 psi | 87% | 2654 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 82% | 48,472 psi | 88% | 2595 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 48,979 psi | 89% | 2690 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 49,240 psi | 89% | 2694 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 48,936 psi | 89% | 2615 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 49,095 psi | 89% | 2713 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 49,559 psi | 90% | 2730 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,602 psi | 88% | 2684 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,718 psi | 88% | 2733 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,240 psi | 89% | 2726 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,917 psi | 78% | 2654 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 48,718 psi | 88% | 2799 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,008 psi | 87% | 2720 fps | 97.2% |
| Bofors RP3 | <<locked>> | 82% | 49,356 psi | 90% | 2628 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 48,718 psi | 88% | 2733 fps | 97.5% |
| Bofors RP7 | <<locked>> | 86% | 49,081 psi | 89% | 2612 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 82% | 49,661 psi | 90% | 2641 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 86% | 47,021 psi | 85% | 2651 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 84% | 46,992 psi | 85% | 2608 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 49,081 psi | 89% | 2641 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,235 psi | 77% | 2684 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 88% | 49,676 psi | 90% | 2733 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 66% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 49,850 psi | 90% | 2644 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 47,572 psi | 86% | 2585 fps | 98.3% |
| IMR 4831 | <<locked>> | 90% | 48,573 psi | 88% | 2651 fps | 99.9% |
| Lovex S065 | <<locked>> | 86% | 47,805 psi | 87% | 2589 fps | 99.3% |
| Lovex S070 | <<locked>> | 88% | 48,646 psi | 88% | 2625 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,555 psi | 79% | 2566 fps | 98.4% |
| Norma 204 | <<locked>> | 90% | 49,835 psi | 90% | 2684 fps | 97.3% |
| Norma MRP | <<locked>> | 96% | 48,370 psi | 88% | 2759 fps | 98.6% |
| Norma URP | <<locked>> | 88% | 47,253 psi | 86% | 2644 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 47,688 psi | 87% | 2720 fps | 96% |
| Ramshot Hunter | <<locked>> | 90% | 48,921 psi | 89% | 2690 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,556 psi | 83% | 2661 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 67% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 49,545 psi | 90% | 2621 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 49,226 psi | 89% | 2726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 47,732 psi | 87% | 2677 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 49,734 psi | 90% | 2753 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,916 psi | 76% | 2674 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 84% | 49,603 psi | 90% | 2628 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 47,558 psi | 86% | 2667 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 86% | 49,081 psi | 89% | 2612 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 47,805 psi | 87% | 2589 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 88% | 48,646 psi | 88% | 2625 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 47,427 psi | 86% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 47,863 psi | 87% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 47,152 psi | 86% | 2539 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,123 psi | 86% | 2661 fps | 97.1% |
| Somchem S355 | <<locked>> | 84% | 49,603 psi | 90% | 2621 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 49,182 psi | 89% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 48,399 psi | 88% | 2651 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 84% | 47,659 psi | 86% | 2556 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 48,921 psi | 89% | 2638 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 98% | 47,442 psi | 86% | 2625 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 88% | 48,356 psi | 88% | 2648 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 96% | 48,443 psi | 88% | 2700 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 48,341 psi | 88% | 2612 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 47,021 psi | 85% | 2651 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,556 psi | 81% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,906 psi | 87% | 2638 fps | 97% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 32,822 psi | 60% | 2346 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 36,361 psi | 66% | 2438 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 45,411 psi | 82% | 2543 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,178 psi | 78% | 2582 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,163 psi | 78% | 2582 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,818 psi | 83% | 2566 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,636 psi | 65% | 2448 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,422 psi | 73% | 2572 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,656 psi | 77% | 2575 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,161 psi | 73% | 2569 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,136 psi | 47% | 2218 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,517 psi | 57% | 2382 fps | 95.1% |
| Alliant Reloder-26 | 42.9 gr | 82% | 29,631 psi | 54% | 2375 fps | 95.2% |
| Bofors RP15 | <<locked>> | 96% | 42,076 psi | 76% | 2608 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 46,195 psi | 84% | 2579 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,161 psi | 73% | 2569 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 40,611 psi | 74% | 2454 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 46,470 psi | 84% | 2589 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 38,551 psi | 70% | 2487 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 41,495 psi | 75% | 2503 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,257 psi | 60% | 2349 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,552 psi | 72% | 2621 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 37,405 psi | 68% | 2493 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 49% | 1490 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,754 psi | 70% | 2438 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,105 psi | 76% | 2484 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 35,143 psi | 64% | 2398 fps | 98% |
| Lovex S065 | <<locked>> | 80% | 39,639 psi | 72% | 2438 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 37,768 psi | 69% | 2418 fps | 96.2% |
| Lovex S071 | <<locked>> | 92% | 33,953 psi | 62% | 2372 fps | 95.8% |
| Norma 204 | <<locked>> | 86% | 43,598 psi | 79% | 2572 fps | 95.7% |
| Norma MRP | 44.7 gr | 88% | 36,724 psi | 67% | 2523 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 36,289 psi | 66% | 2434 fps | 98.1% |
| Ramshot Grand | <<locked>> | 96% | 44,512 psi | 81% | 2657 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 35,157 psi | 64% | 2421 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 96% | 39,305 psi | 71% | 2536 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 50% | 1529 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,485 psi | 84% | 2569 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,931 psi | 78% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,100 psi | 66% | 2457 fps | 97.9% |
| ReloadSwiss RS 70 | 41.5 gr | 80% | 35,244 psi | 64% | 2461 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,943 psi | 71% | 2605 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 43,352 psi | 79% | 2523 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 41,771 psi | 76% | 2559 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 40,611 psi | 74% | 2454 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,639 psi | 72% | 2438 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 80% | 37,768 psi | 69% | 2418 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,425 psi | 81% | 2575 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,759 psi | 81% | 2434 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,682 psi | 70% | 2382 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,379 psi | 75% | 2556 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 43,772 psi | 79% | 2523 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 32,735 psi | 59% | 2395 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 37,159 psi | 67% | 2438 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 41,713 psi | 76% | 2457 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,637 psi | 68% | 2431 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 39,030 psi | 71% | 2470 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 37,217 psi | 68% | 2438 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 28,660 psi | 52% | 2293 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,825 psi | 67% | 2408 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 38,551 psi | 70% | 2487 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,555 psi | 45% | 2241 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,771 psi | 76% | 2526 fps | 95.4% |
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 63 powders for 6.5 x 55 Swedish loaded with the .263 | 139gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,799 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,799 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 63 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.263" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for 6.5 x 55 Swedish with the .263 | 139gr | Prvi Partizan FMJ 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.