Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 130gr | Swift Scirocco bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Alliant Reloder-16.
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 3100ᴾ | <<locked>> | 100% | 46,456 psi | 90% | 2677 fps | 98% |
| Accurate 4064 | <<locked>> | 82% | 46,354 psi | 90% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 45,672 psi | 89% | 2684 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 44,324 psi | 86% | 2582 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 44,396 psi | 86% | 2608 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 44,295 psi | 86% | 2690 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 44,440 psi | 86% | 2713 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,874 psi | 85% | 2703 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,667 psi | 75% | 2608 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 46,050 psi | 89% | 2815 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 44,657 psi | 87% | 2621 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 44,976 psi | 87% | 2592 fps | 96% |
| Hodgdon H380 | <<locked>> | 82% | 45,208 psi | 88% | 2625 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 88% | 44,962 psi | 87% | 2674 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,874 psi | 85% | 2628 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,715 psi | 87% | 2697 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 70% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 45,339 psi | 88% | 2621 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 46,369 psi | 90% | 2621 fps | 96.9% |
| IMR 4831 | <<locked>> | 90% | 43,569 psi | 85% | 2631 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 46,340 psi | 90% | 2625 fps | 98.2% |
| Lovex S070 | <<locked>> | 88% | 44,121 psi | 86% | 2602 fps | 96.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,696 psi | 75% | 2533 fps | 96% |
| Norma MRP | <<locked>> | 98% | 45,977 psi | 89% | 2772 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 45,136 psi | 88% | 2674 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 44,077 psi | 86% | 2667 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 71% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,368 psi | 88% | 2608 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 44,106 psi | 86% | 2713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 45,310 psi | 88% | 2703 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 44,730 psi | 87% | 2723 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 84% | 44,846 psi | 87% | 2618 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 44,976 psi | 87% | 2592 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 88% | 46,340 psi | 90% | 2625 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 88% | 44,121 psi | 86% | 2602 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 46,006 psi | 89% | 2671 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 46,543 psi | 90% | 2533 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,919 psi | 89% | 2572 fps | 96.9% |
| Somchem S355 | <<locked>> | 84% | 45,107 psi | 88% | 2615 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 46,456 psi | 90% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 46,093 psi | 90% | 2671 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 86% | 46,122 psi | 90% | 2598 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 44,324 psi | 86% | 2625 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 90% | 46,369 psi | 90% | 2677 fps | 99% |
| Vihtavuori N555 | <<locked>> | 98% | 45,788 psi | 89% | 2726 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,700 psi | 85% | 2595 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 45,310 psi | 88% | 2680 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,262 psi | 76% | 2730 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% | 37,855 psi | 74% | 2516 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,540 psi | 85% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,358 psi | 63% | 2405 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,713 psi | 81% | 2533 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,756 psi | 81% | 2559 fps | 99.7% |
| Alliant Reloder-16 | 36.6 gr | 80% | 32,329 psi | 63% | 2415 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,129 psi | 70% | 2539 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,239 psi | 55% | 2329 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,158 psi | 70% | 2549 fps | 95.5% |
| Alliant Reloder-26 | 45.5 gr | 90% | 34,795 psi | 68% | 2566 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 41,640 psi | 81% | 2566 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,337 psi | 82% | 2543 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 42,221 psi | 82% | 2569 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 39,436 psi | 77% | 2562 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,892 psi | 58% | 2323 fps | 96.6% |
| Hodgdon Superformance | <<locked>> | 86% | 41,466 psi | 81% | 2631 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 52% | 1519 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,424 psi | 82% | 2566 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,162 psi | 80% | 2520 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,502 psi | 61% | 2369 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 36,187 psi | 70% | 2418 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 39,088 psi | 76% | 2500 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 36,260 psi | 70% | 2484 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 40,074 psi | 78% | 2651 fps | 95% |
| Norma URP | <<locked>> | 80% | 32,619 psi | 63% | 2408 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 86% | 38,522 psi | 75% | 2552 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 53% | 1555 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,453 psi | 82% | 2552 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,406 psi | 75% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,053 psi | 62% | 2418 fps | 95.1% |
| ReloadSwiss RS 70 | 41.1 gr | 82% | 34,142 psi | 66% | 2480 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 39,247 psi | 76% | 2510 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 42,337 psi | 82% | 2543 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,187 psi | 70% | 2418 fps | 95.5% |
| Shooters World SW4350 | <<locked>> | 84% | 39,088 psi | 76% | 2500 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,103 psi | 78% | 2559 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,336 psi | 80% | 2448 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,335 psi | 78% | 2467 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 39,885 psi | 77% | 2516 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 29,254 psi | 57% | 2362 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 43,323 psi | 84% | 2618 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 37,942 psi | 74% | 2451 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,953 psi | 66% | 2408 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 80% | 33,417 psi | 65% | 2408 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 30,661 psi | 60% | 2405 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,533 psi | 65% | 2385 fps | 98.1% |
| Winchester 760 | <<locked>> | 84% | 39,711 psi | 77% | 2569 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,442 psi | 55% | 2415 fps | 96.3% |
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 48 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 130gr | Swift Scirocco. Alliant Reloder-26 delivers the highest muzzle velocity at 2,815 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,815 fps. Accurate 3100 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 130gr | Swift Scirocco 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.