Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 144gr | Sierra MatchKing bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Winchester StaBALL HD.
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% | 45,005 psi | 87% | 2533 fps | 98.7% |
| Accurate 4350 | <<locked>> | 86% | 44,048 psi | 86% | 2530 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 45,063 psi | 88% | 2556 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,150 psi | 88% | 2582 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 45,266 psi | 88% | 2598 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,773 psi | 87% | 2556 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,657 psi | 87% | 2598 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 45,266 psi | 88% | 2605 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,235 psi | 82% | 2579 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 44,251 psi | 86% | 2657 fps | 99.6% |
| Bofors RP15 | <<locked>> | 98% | 44,005 psi | 85% | 2585 fps | 96.1% |
| Bofors RP5 | <<locked>> | 96% | 44,657 psi | 87% | 2598 fps | 96.4% |
| Bofors RP7 | <<locked>> | 84% | 45,426 psi | 88% | 2484 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 86% | 46,035 psi | 89% | 2572 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 84% | 46,209 psi | 90% | 2533 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 45,368 psi | 88% | 2523 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,194 psi | 88% | 2592 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,289 psi | 70% | 1621 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 46,093 psi | 90% | 2516 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,077 psi | 86% | 2461 fps | 97.5% |
| IMR 4831 | <<locked>> | 88% | 44,715 psi | 87% | 2526 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 44,266 psi | 86% | 2467 fps | 98.7% |
| Lovex S070 | <<locked>> | 86% | 44,875 psi | 87% | 2497 fps | 98% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,815 psi | 83% | 2493 fps | 98.3% |
| Norma 204 | <<locked>> | 88% | 45,745 psi | 89% | 2549 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 43,990 psi | 85% | 2618 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 46,180 psi | 90% | 2566 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 88% | 44,918 psi | 87% | 2559 fps | 98.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,382 psi | 86% | 2575 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 72% | 1660 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 45,194 psi | 88% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 43,642 psi | 85% | 2546 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,469 psi | 88% | 2618 fps | 99.5% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,959 psi | 80% | 2592 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 82% | 45,701 psi | 89% | 2503 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 43,540 psi | 85% | 2533 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 84% | 45,426 psi | 88% | 2484 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,266 psi | 86% | 2467 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 86% | 44,875 psi | 87% | 2497 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 46,572 psi | 90% | 2552 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 46,166 psi | 90% | 2464 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,325 psi | 90% | 2585 fps | 96.8% |
| Somchem S355 | <<locked>> | 82% | 45,759 psi | 89% | 2497 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 45,092 psi | 88% | 2575 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 44,237 psi | 86% | 2516 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 82% | 43,961 psi | 85% | 2438 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 45,295 psi | 88% | 2516 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 98% | 46,528 psi | 90% | 2546 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 86% | 44,367 psi | 86% | 2516 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 94% | 44,324 psi | 86% | 2572 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 44,295 psi | 86% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 46,340 psi | 90% | 2575 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,613 psi | 85% | 2703 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,816 psi | 85% | 2503 fps | 95.9% |
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>> | 86% | 32,126 psi | 62% | 2277 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 35,636 psi | 69% | 2365 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 42,380 psi | 82% | 2507 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,230 psi | 68% | 2379 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,610 psi | 77% | 2497 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,843 psi | 81% | 2500 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,959 psi | 81% | 2546 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,657 psi | 50% | 2149 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,764 psi | 64% | 2362 fps | 95.7% |
| Alliant Reloder-26 | 42.4 gr | 84% | 31,212 psi | 61% | 2365 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 41,394 psi | 80% | 2533 fps | 95.3% |
| Bofors RP5 | <<locked>> | 94% | 41,959 psi | 81% | 2546 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 39,958 psi | 78% | 2379 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 37,710 psi | 73% | 2408 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 40,654 psi | 79% | 2428 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,590 psi | 63% | 2280 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 80% | 36,593 psi | 71% | 2415 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,006 psi | 52% | 1444 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,203 psi | 74% | 2369 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,524 psi | 81% | 2411 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 34,490 psi | 67% | 2326 fps | 97.8% |
| Lovex S065 | <<locked>> | 80% | 38,972 psi | 76% | 2365 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 37,173 psi | 72% | 2346 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 33,083 psi | 64% | 2300 fps | 95.4% |
| Norma 204 | <<locked>> | 86% | 43,004 psi | 84% | 2500 fps | 95.5% |
| Norma MRP | 43.1 gr | 88% | 36,042 psi | 70% | 2451 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,650 psi | 69% | 2362 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,664 psi | 67% | 2352 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 98% | 41,278 psi | 80% | 2516 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 54% | 1483 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,105 psi | 82% | 2546 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,346 psi | 69% | 2382 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,621 psi | 67% | 2388 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,247 psi | 74% | 2526 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 42,583 psi | 83% | 2451 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 40,843 psi | 79% | 2484 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,958 psi | 78% | 2379 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,972 psi | 76% | 2365 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 80% | 37,173 psi | 72% | 2346 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,845 psi | 85% | 2507 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,145 psi | 74% | 2313 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,451 psi | 79% | 2477 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 43,033 psi | 84% | 2451 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 32,097 psi | 62% | 2323 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 38,856 psi | 75% | 2415 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 41,017 psi | 80% | 2385 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,970 psi | 72% | 2362 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 40,814 psi | 79% | 2444 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 36,651 psi | 71% | 2369 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,007 psi | 54% | 2221 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,260 psi | 70% | 2339 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 37,985 psi | 74% | 2415 fps | 96% |
| Winchester StaBALL HD | 39.7 gr | 82% | 24,076 psi | 47% | 2169 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,133 psi | 80% | 2454 fps | 95.1% |
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 54 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 144gr | Sierra MatchKing. Winchester StaBALL HD delivers the highest muzzle velocity at 2,703 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,703 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 54 of the 54 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 144.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, Lovex S071 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, Norma MRP, Winchester StaBALL HD rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 144gr | Sierra MatchKing 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.