Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 159gr | RWS TMR bullet and 59 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo and ReloadSwiss RS 76.
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>> | 92% | 45,498 psi | 88% | 2434 fps | 99.5% |
| Accurate 4350 | <<locked>> | 82% | 44,048 psi | 86% | 2418 fps | 99.9% |
| Accurate High Country | <<locked>> | 90% | 46,470 psi | 90% | 2552 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 88% | 44,918 psi | 87% | 2457 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 92% | 45,774 psi | 89% | 2503 fps | 96.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,642 psi | 85% | 2457 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,551 psi | 75% | 2421 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 45,382 psi | 88% | 2461 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 45,107 psi | 88% | 2470 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,875 psi | 87% | 2454 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,353 psi | 88% | 2507 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 94% | 46,166 psi | 90% | 2500 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 45,542 psi | 88% | 2539 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 45,063 psi | 88% | 2559 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 44,715 psi | 87% | 2493 fps | 97.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,338 psi | 86% | 2523 fps | 97.1% |
| Bofors RP5 | <<locked>> | 92% | 45,353 psi | 88% | 2507 fps | 98% |
| Hodgdon H1000 | <<locked>> | 98% | 44,788 psi | 87% | 2484 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 82% | 45,992 psi | 89% | 2464 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 90% | 45,832 psi | 89% | 2454 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 45,455 psi | 88% | 2411 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 44,498 psi | 86% | 2579 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 82% | 45,063 psi | 88% | 2484 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 72% | 1568 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 45,687 psi | 89% | 2411 fps | 98.7% |
| IMR 4831 | <<locked>> | 84% | 44,773 psi | 87% | 2415 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,744 psi | 87% | 2398 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 92% | 43,801 psi | 85% | 2477 fps | 96.2% |
| Lovex S065 | <<locked>> | 82% | 46,543 psi | 90% | 2402 fps | 99.7% |
| Lovex S070 | <<locked>> | 82% | 44,628 psi | 87% | 2392 fps | 99% |
| Lovex S071 | <<locked>> | 96% | 43,642 psi | 85% | 2402 fps | 99.3% |
| Norma 204 | <<locked>> | 84% | 45,426 psi | 88% | 2444 fps | 97.6% |
| Norma MRP | <<locked>> | 90% | 44,788 psi | 87% | 2526 fps | 99% |
| Norma URP | <<locked>> | 84% | 46,485 psi | 90% | 2457 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 43,656 psi | 85% | 2490 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 84% | 44,962 psi | 87% | 2451 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 96% | 44,846 psi | 87% | 2490 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 73% | 1604 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 43,743 psi | 85% | 2434 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 45,324 psi | 88% | 2507 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 44,280 psi | 86% | 2575 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 43,758 psi | 85% | 2388 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 88% | 43,888 psi | 85% | 2438 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 46,543 psi | 90% | 2402 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 82% | 44,628 psi | 87% | 2392 fps | 99% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 45,455 psi | 88% | 2352 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 46,557 psi | 90% | 2487 fps | 98.2% |
| Somchem S365 | <<locked>> | 86% | 46,006 psi | 89% | 2464 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 44,483 psi | 86% | 2418 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 82% | 44,875 psi | 87% | 2402 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 92% | 43,874 psi | 85% | 2402 fps | 98% |
| Vihtavuori N550 | <<locked>> | 82% | 44,295 psi | 86% | 2408 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 90% | 45,571 psi | 89% | 2477 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 45,092 psi | 88% | 2516 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 96% | 44,425 psi | 86% | 2497 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 43,976 psi | 85% | 2372 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 45,992 psi | 89% | 2464 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 44,846 psi | 87% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,787 psi | 85% | 2405 fps | 97.4% |
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>> | 80% | 30,603 psi | 59% | 2142 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 41,379 psi | 80% | 2369 fps | 99.8% |
| Accurate High Country | <<locked>> | 86% | 40,321 psi | 78% | 2441 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 82% | 37,014 psi | 72% | 2303 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 42,844 psi | 83% | 2448 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 40,785 psi | 79% | 2402 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 94% | 32,097 psi | 62% | 2264 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,202 psi | 72% | 2303 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,711 psi | 77% | 2372 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,854 psi | 72% | 2300 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,072 psi | 72% | 2346 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,399 psi | 57% | 2169 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,298 psi | 57% | 2182 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,531 psi | 61% | 2280 fps | 97.8% |
| Bofors RP15 | <<locked>> | 88% | 36,854 psi | 72% | 2339 fps | 95.4% |
| Bofors RP30 | <<locked>> | 96% | 39,015 psi | 76% | 2421 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 37,072 psi | 72% | 2346 fps | 95.7% |
| Hodgdon H1000 | <<locked>> | 94% | 39,407 psi | 77% | 2379 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 43,091 psi | 84% | 2411 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 88% | 42,902 psi | 83% | 2402 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,492 psi | 73% | 2277 fps | 100% |
| Hodgdon Retumbo | 45.3 gr | 92% | 36,869 psi | 72% | 2411 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,843 psi | 81% | 2428 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 54% | 1398 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,161 psi | 78% | 2310 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 39,465 psi | 77% | 2323 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,235 psi | 82% | 2352 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 41,002 psi | 80% | 2425 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 43,656 psi | 85% | 2356 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 41,814 psi | 81% | 2339 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 29,979 psi | 58% | 2129 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 39,755 psi | 77% | 2339 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 31,821 psi | 62% | 2251 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 40,669 psi | 79% | 2359 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 40,770 psi | 79% | 2434 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,450 psi | 77% | 2352 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 33,852 psi | 66% | 2270 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 54% | 1430 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,930 psi | 79% | 2385 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,421 psi | 77% | 2398 fps | 99.4% |
| ReloadSwiss RS 76 | 47.4 gr | 90% | 33,634 psi | 65% | 2333 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 84% | 40,944 psi | 80% | 2336 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 36,042 psi | 70% | 2283 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,656 psi | 85% | 2356 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 41,814 psi | 81% | 2339 fps | 98.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,569 psi | 83% | 2303 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,708 psi | 69% | 2280 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,289 psi | 72% | 2320 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,461 psi | 67% | 2224 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 80% | 42,279 psi | 82% | 2359 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 33,837 psi | 66% | 2208 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 41,524 psi | 81% | 2359 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,866 psi | 64% | 2238 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 88% | 41,930 psi | 81% | 2454 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 41,524 psi | 81% | 2441 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,944 psi | 80% | 2326 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,091 psi | 84% | 2411 fps | 98.7% |
| Winchester StaBALL HD | 40.4 gr | 80% | 25,947 psi | 50% | 2165 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 35,694 psi | 69% | 2254 fps | 95% |
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 59 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 159gr | RWS TMR. Winchester StaBALL HD delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,605 fps. ADI AR 2217 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 159.0 gr projectile in 0.264" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Winchester StaBALL HD, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 159gr | RWS TMR 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.