Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 155gr | Sierra HPBT LR MatchKing bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Norma MRP.
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>> | 94% | 44,324 psi | 86% | 2431 fps | 99.1% |
| Accurate 4350 | <<locked>> | 86% | 46,325 psi | 90% | 2474 fps | 99.9% |
| Accurate High Country | <<locked>> | 92% | 44,918 psi | 87% | 2546 fps | 96.2% |
| ADI AR 2209 | <<locked>> | 90% | 44,280 psi | 86% | 2457 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,643 psi | 87% | 2461 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 86% | 44,657 psi | 87% | 2480 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 44,570 psi | 87% | 2490 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,121 psi | 86% | 2454 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,266 psi | 86% | 2503 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 44,904 psi | 87% | 2503 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,237 psi | 86% | 2533 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 92% | 43,845 psi | 85% | 2559 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 46,485 psi | 90% | 2539 fps | 97.5% |
| Bofors RP5 | <<locked>> | 94% | 44,266 psi | 86% | 2503 fps | 97.2% |
| Bofors RP7 | <<locked>> | 82% | 44,628 psi | 87% | 2382 fps | 97.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 43,961 psi | 85% | 2470 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 84% | 45,324 psi | 88% | 2467 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 82% | 45,542 psi | 88% | 2434 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 44,614 psi | 87% | 2418 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,337 psi | 84% | 2562 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 84% | 44,367 psi | 86% | 2487 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,535 psi | 71% | 1562 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 45,208 psi | 88% | 2415 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 45,905 psi | 89% | 2408 fps | 98.5% |
| IMR 4831 | <<locked>> | 86% | 44,295 psi | 86% | 2428 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 96% | 45,905 psi | 89% | 2526 fps | 96% |
| Lovex S065 | <<locked>> | 84% | 45,919 psi | 89% | 2408 fps | 99.4% |
| Lovex S070 | <<locked>> | 84% | 44,266 psi | 86% | 2398 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,295 psi | 88% | 2448 fps | 99.2% |
| Norma 204 | <<locked>> | 86% | 44,991 psi | 87% | 2448 fps | 96.9% |
| Norma MRP | <<locked>> | 94% | 46,572 psi | 90% | 2572 fps | 98.9% |
| Norma URP | <<locked>> | 86% | 45,701 psi | 89% | 2464 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 45,890 psi | 89% | 2539 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 86% | 44,324 psi | 86% | 2457 fps | 99% |
| Ramshot Magnum | <<locked>> | 98% | 43,787 psi | 85% | 2484 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 72% | 1598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 45,992 psi | 89% | 2493 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 44,585 psi | 87% | 2510 fps | 99.7% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,163 psi | 84% | 2559 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 90% | 46,122 psi | 90% | 2441 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 92% | 46,166 psi | 90% | 2490 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 82% | 44,628 psi | 87% | 2382 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 45,919 psi | 89% | 2408 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 84% | 44,266 psi | 86% | 2398 fps | 98.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 45,382 psi | 88% | 2362 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,745 psi | 89% | 2487 fps | 97.5% |
| Somchem S365 | <<locked>> | 88% | 44,628 psi | 87% | 2467 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 43,743 psi | 85% | 2421 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 82% | 46,021 psi | 89% | 2375 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 44,469 psi | 86% | 2411 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 96% | 45,759 psi | 89% | 2448 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 84% | 43,613 psi | 85% | 2415 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 92% | 44,324 psi | 86% | 2477 fps | 100% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 45,992 psi | 89% | 2539 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 46,354 psi | 90% | 2428 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 45,324 psi | 88% | 2467 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,006 psi | 89% | 2654 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,180 psi | 90% | 2461 fps | 97.3% |
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>> | 82% | 29,791 psi | 58% | 2139 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 37,695 psi | 73% | 2320 fps | 99.1% |
| Accurate High Country | <<locked>> | 90% | 42,105 psi | 82% | 2493 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 86% | 39,073 psi | 76% | 2356 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 39,146 psi | 76% | 2356 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,898 psi | 72% | 2333 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,510 psi | 81% | 2438 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,754 psi | 75% | 2352 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,798 psi | 75% | 2398 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,977 psi | 52% | 2119 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,472 psi | 59% | 2224 fps | 95.7% |
| Alliant Reloder-26 | 39.8 gr | 80% | 28,674 psi | 56% | 2218 fps | 95.8% |
| Bofors RP15 | <<locked>> | 92% | 38,290 psi | 74% | 2385 fps | 95.2% |
| Bofors RP5 | <<locked>> | 90% | 38,798 psi | 75% | 2398 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 41,959 psi | 81% | 2336 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 98% | 41,263 psi | 80% | 2418 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,682 psi | 77% | 2365 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 42,554 psi | 83% | 2379 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,316 psi | 67% | 2234 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,334 psi | 74% | 2454 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 38,638 psi | 75% | 2379 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 53% | 1394 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 37,376 psi | 73% | 2267 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,221 psi | 84% | 2359 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 36,347 psi | 71% | 2280 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 94% | 43,091 psi | 84% | 2474 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 40,654 psi | 79% | 2313 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 38,899 psi | 76% | 2297 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 30,879 psi | 60% | 2169 fps | 95.5% |
| Norma 204 | <<locked>> | 82% | 39,349 psi | 76% | 2346 fps | 95.3% |
| Norma MRP | 40.6 gr | 84% | 33,272 psi | 65% | 2303 fps | 95% |
| Norma URP | <<locked>> | 80% | 37,507 psi | 73% | 2316 fps | 98.9% |
| Ramshot Grand | <<locked>> | 94% | 42,656 psi | 83% | 2480 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,274 psi | 70% | 2303 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 94% | 37,884 psi | 74% | 2369 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 54% | 1427 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,434 psi | 73% | 2339 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,477 psi | 71% | 2349 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,099 psi | 68% | 2379 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 88% | 43,337 psi | 84% | 2392 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 37,768 psi | 73% | 2336 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,959 psi | 81% | 2336 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,654 psi | 79% | 2313 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 80% | 38,899 psi | 76% | 2297 fps | 97.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,784 psi | 77% | 2264 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 37,420 psi | 73% | 2329 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 33,968 psi | 66% | 2277 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 36,013 psi | 70% | 2274 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 42,902 psi | 83% | 2329 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,870 psi | 75% | 2313 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 37,884 psi | 74% | 2306 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 38,290 psi | 74% | 2316 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 29,762 psi | 58% | 2185 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 98% | 42,815 psi | 83% | 2484 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,087 psi | 74% | 2290 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 39,682 psi | 77% | 2365 fps | 97.4% |
| Winchester StaBALL HD | 38.2 gr | 80% | 23,772 psi | 46% | 2093 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,292 psi | 78% | 2356 fps | 95.8% |
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 58 mm Mauser Port. loaded with the .264 | 155gr | Sierra HPBT LR MatchKing. Winchester StaBALL HD delivers the highest muzzle velocity at 2,654 fps; across all powders the maximum-charge window runs from 1,562 fps to 2,654 fps. Alliant Reloder-25 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 (355 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon H1000, Hodgdon Retumbo 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, Winchester StaBALL HD, Norma MRP rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 155gr | Sierra HPBT LR 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.