Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 130gr | Sierra Tipped GameKing bullet and 49 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% | 46,340 psi | 90% | 2677 fps | 98% |
| Accurate 4064 | <<locked>> | 82% | 46,311 psi | 90% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 45,658 psi | 89% | 2684 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 44,295 psi | 86% | 2582 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 44,367 psi | 86% | 2608 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 44,237 psi | 86% | 2690 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 44,367 psi | 86% | 2713 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,801 psi | 85% | 2703 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,609 psi | 75% | 2608 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 46,296 psi | 90% | 2822 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 44,585 psi | 87% | 2618 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 44,904 psi | 87% | 2592 fps | 96% |
| Hodgdon H380 | <<locked>> | 82% | 45,165 psi | 88% | 2625 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 88% | 45,237 psi | 88% | 2677 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 44,135 psi | 86% | 2631 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,672 psi | 87% | 2697 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 70% | 1703 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 46,557 psi | 90% | 2615 fps | 99.6% |
| IMR 4350 | <<locked>> | 90% | 45,281 psi | 88% | 2621 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,656 psi | 85% | 2569 fps | 96.2% |
| IMR 4831 | <<locked>> | 90% | 43,801 psi | 85% | 2635 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 46,296 psi | 90% | 2625 fps | 98.2% |
| Lovex S070 | <<locked>> | 88% | 44,077 psi | 86% | 2602 fps | 96.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,638 psi | 75% | 2533 fps | 96% |
| Norma MRP | <<locked>> | 98% | 45,876 psi | 89% | 2772 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 45,353 psi | 88% | 2677 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 44,005 psi | 85% | 2667 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 71% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,324 psi | 88% | 2608 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 44,063 psi | 86% | 2713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 45,571 psi | 89% | 2707 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 44,657 psi | 87% | 2720 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 84% | 44,773 psi | 87% | 2618 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 44,904 psi | 87% | 2592 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 88% | 46,296 psi | 90% | 2625 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 88% | 44,077 psi | 86% | 2602 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 45,934 psi | 89% | 2671 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 43,932 psi | 85% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,861 psi | 89% | 2572 fps | 96.9% |
| Somchem S355 | <<locked>> | 84% | 45,382 psi | 88% | 2618 fps | 99.8% |
| Somchem S365 | <<locked>> | 92% | 43,482 psi | 84% | 2680 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 46,006 psi | 89% | 2667 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 86% | 46,079 psi | 89% | 2598 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 44,280 psi | 86% | 2625 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 88% | 43,555 psi | 85% | 2625 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 98% | 45,774 psi | 89% | 2726 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,627 psi | 85% | 2595 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 45,237 psi | 88% | 2677 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,465 psi | 77% | 2736 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% | 37,826 psi | 73% | 2516 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,526 psi | 85% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,343 psi | 63% | 2405 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,655 psi | 81% | 2533 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,713 psi | 81% | 2556 fps | 99.7% |
| Alliant Reloder-16 | 36.6 gr | 80% | 32,314 psi | 63% | 2418 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,318 psi | 71% | 2543 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,398 psi | 55% | 2336 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,143 psi | 70% | 2549 fps | 95.5% |
| Alliant Reloder-26 | 45.5 gr | 90% | 34,751 psi | 67% | 2566 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 41,568 psi | 81% | 2562 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,264 psi | 82% | 2543 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 42,177 psi | 82% | 2569 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 39,378 psi | 76% | 2562 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,892 psi | 58% | 2323 fps | 96.6% |
| Hodgdon Superformance | <<locked>> | 86% | 41,713 psi | 81% | 2638 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 52% | 1519 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,787 psi | 85% | 2566 fps | 99.3% |
| IMR 4350 | <<locked>> | 88% | 42,656 psi | 83% | 2572 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,133 psi | 80% | 2520 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,473 psi | 61% | 2369 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 36,143 psi | 70% | 2418 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 39,073 psi | 76% | 2500 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 36,216 psi | 70% | 2480 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 40,001 psi | 78% | 2651 fps | 95% |
| Norma URP | <<locked>> | 80% | 32,576 psi | 63% | 2405 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 84% | 36,201 psi | 70% | 2500 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 53% | 1555 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,424 psi | 82% | 2552 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,638 psi | 75% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,024 psi | 62% | 2418 fps | 95.1% |
| ReloadSwiss RS 70 | 41.1 gr | 82% | 34,113 psi | 66% | 2480 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 39,204 psi | 76% | 2513 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 42,264 psi | 82% | 2543 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,143 psi | 70% | 2418 fps | 95.5% |
| Shooters World SW4350 | <<locked>> | 84% | 39,073 psi | 76% | 2500 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,321 psi | 78% | 2562 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,278 psi | 80% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,263 psi | 78% | 2467 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 39,856 psi | 77% | 2513 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 29,254 psi | 57% | 2362 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 43,294 psi | 84% | 2618 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 37,913 psi | 74% | 2451 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,910 psi | 66% | 2408 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 80% | 33,388 psi | 65% | 2408 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 30,893 psi | 60% | 2411 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,518 psi | 65% | 2385 fps | 98.1% |
| Winchester 760 | <<locked>> | 84% | 39,697 psi | 77% | 2569 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,413 psi | 55% | 2415 fps | 96.4% |
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 49 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 130gr | Sierra Tipped GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,822 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,822 fps. Accurate 3100 gives the best case fill at 100 %, and 49 of the 49 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 1:9.0 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 | Sierra Tipped GameKing 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.