Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .263 | 150gr | Rhino Solid Shank bullet and 53 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% | 44,019 psi | 85% | 2467 fps | 98.8% |
| Accurate 4350 | <<locked>> | 86% | 45,832 psi | 89% | 2510 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,830 psi | 85% | 2490 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,150 psi | 86% | 2493 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,150 psi | 86% | 2493 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 44,005 psi | 85% | 2513 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 82% | 44,164 psi | 86% | 2530 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,354 psi | 90% | 2536 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,642 psi | 85% | 2533 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 44,295 psi | 86% | 2536 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,845 psi | 85% | 2566 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 92% | 43,352 psi | 84% | 2592 fps | 99.7% |
| Bofors RP15 | <<locked>> | 98% | 45,759 psi | 89% | 2569 fps | 97.1% |
| Bofors RP5 | <<locked>> | 94% | 43,642 psi | 85% | 2533 fps | 96.7% |
| Bofors RP7 | <<locked>> | 82% | 44,121 psi | 86% | 2415 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 84% | 44,904 psi | 87% | 2503 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 82% | 44,962 psi | 87% | 2464 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 44,237 psi | 86% | 2454 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,859 psi | 83% | 2592 fps | 97% |
| Hodgdon Superformance | <<locked>> | 84% | 43,787 psi | 85% | 2520 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 71% | 1594 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 44,875 psi | 87% | 2451 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 45,397 psi | 88% | 2438 fps | 98.2% |
| IMR 4831 | <<locked>> | 86% | 43,584 psi | 85% | 2457 fps | 99.7% |
| Lovex S065 | <<locked>> | 84% | 45,672 psi | 89% | 2444 fps | 99.2% |
| Lovex S070 | <<locked>> | 84% | 43,685 psi | 85% | 2431 fps | 98.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,628 psi | 87% | 2480 fps | 98.9% |
| Norma 204 | <<locked>> | 86% | 44,541 psi | 87% | 2484 fps | 96.5% |
| Norma MRP | <<locked>> | 94% | 46,122 psi | 90% | 2608 fps | 98.5% |
| Norma URP | <<locked>> | 86% | 45,339 psi | 88% | 2500 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 43,874 psi | 85% | 2493 fps | 98.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,514 psi | 90% | 2569 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,260 psi | 72% | 1631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 45,455 psi | 88% | 2526 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 44,048 psi | 86% | 2543 fps | 99.6% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,873 psi | 83% | 2592 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 92% | 45,600 psi | 89% | 2523 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 82% | 44,121 psi | 86% | 2415 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 45,672 psi | 89% | 2444 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 84% | 43,685 psi | 85% | 2431 fps | 98.2% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 44,773 psi | 87% | 2395 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,179 psi | 88% | 2516 fps | 97.1% |
| Somchem S365 | <<locked>> | 88% | 44,092 psi | 86% | 2503 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 46,253 psi | 90% | 2507 fps | 98% |
| Vihtavuori N150 | <<locked>> | 82% | 45,455 psi | 88% | 2411 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 43,801 psi | 85% | 2441 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 96% | 45,440 psi | 88% | 2484 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 86% | 46,238 psi | 90% | 2500 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 92% | 43,772 psi | 85% | 2513 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 46,151 psi | 90% | 2467 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 44,904 psi | 87% | 2503 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,469 psi | 88% | 2687 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,818 psi | 89% | 2493 fps | 96.9% |
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>> | 84% | 31,270 psi | 61% | 2211 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 37,434 psi | 73% | 2356 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 41,234 psi | 80% | 2441 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 41,234 psi | 80% | 2438 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 41,234 psi | 80% | 2438 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,506 psi | 71% | 2365 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,162 psi | 80% | 2474 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,814 psi | 79% | 2431 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,305 psi | 74% | 2425 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,643 psi | 52% | 2142 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,197 psi | 59% | 2251 fps | 95% |
| Alliant Reloder-26 | 40.5 gr | 80% | 28,355 psi | 55% | 2241 fps | 95.1% |
| Bofors RP15 | <<locked>> | 94% | 40,480 psi | 79% | 2470 fps | 95.6% |
| Bofors RP5 | <<locked>> | 90% | 38,305 psi | 74% | 2425 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 41,495 psi | 81% | 2365 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,131 psi | 76% | 2392 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 42,308 psi | 82% | 2415 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,881 psi | 66% | 2264 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 37,753 psi | 73% | 2477 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 38,232 psi | 74% | 2408 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 53% | 1421 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 37,188 psi | 72% | 2303 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,757 psi | 83% | 2392 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 35,882 psi | 70% | 2310 fps | 98.5% |
| Lovex S065 | <<locked>> | 80% | 40,263 psi | 78% | 2346 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 38,725 psi | 75% | 2336 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 30,603 psi | 59% | 2195 fps | 95% |
| Norma 204 | <<locked>> | 84% | 41,582 psi | 81% | 2428 fps | 95.6% |
| Norma MRP | 42.3 gr | 86% | 35,259 psi | 68% | 2385 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 37,289 psi | 72% | 2352 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 80% | 35,998 psi | 70% | 2336 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 37,521 psi | 73% | 2398 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,702 psi | 54% | 1453 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,101 psi | 72% | 2372 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,911 psi | 70% | 2375 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,130 psi | 72% | 2464 fps | 96% |
| Rottweil R 905 | <<locked>> | 88% | 39,885 psi | 77% | 2418 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,495 psi | 81% | 2365 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,263 psi | 78% | 2346 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 80% | 38,725 psi | 75% | 2336 fps | 97% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,349 psi | 76% | 2297 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,508 psi | 77% | 2411 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 33,721 psi | 65% | 2313 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 35,679 psi | 69% | 2303 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 42,699 psi | 83% | 2365 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,667 psi | 75% | 2349 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 37,434 psi | 73% | 2333 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 38,014 psi | 74% | 2349 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,341 psi | 57% | 2211 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,521 psi | 73% | 2320 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 39,421 psi | 77% | 2398 fps | 97% |
| Winchester StaBALL HD | 38.9 gr | 80% | 23,598 psi | 46% | 2116 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,784 psi | 77% | 2385 fps | 95.2% |
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 53 powders for 6.5 x 58 mm Mauser Port. loaded with the .263 | 150gr | Rhino Solid Shank. Winchester StaBALL HD delivers the highest muzzle velocity at 2,687 fps; across all powders the maximum-charge window runs from 1,594 fps to 2,687 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 53 of the 53 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 150.0 gr projectile in 0.263" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon Retumbo, Hodgdon TrailBoss 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 .263 | 150gr | Rhino Solid Shank 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.