Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .263 | 140gr | 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, 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 45,092 psi | 88% | 2572 fps | 98.5% |
| Accurate 4350 | <<locked>> | 86% | 44,150 psi | 86% | 2569 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 45,252 psi | 88% | 2598 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,455 psi | 88% | 2602 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,266 psi | 88% | 2625 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 45,585 psi | 89% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,904 psi | 87% | 2595 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,991 psi | 87% | 2641 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 45,310 psi | 88% | 2644 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,148 psi | 82% | 2615 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 94% | 44,483 psi | 86% | 2700 fps | 99.6% |
| Bofors RP15 | <<locked>> | 98% | 44,048 psi | 86% | 2625 fps | 95.9% |
| Bofors RP5 | <<locked>> | 96% | 44,991 psi | 87% | 2641 fps | 96.3% |
| Bofors RP7 | <<locked>> | 84% | 45,614 psi | 89% | 2526 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 46,050 psi | 89% | 2612 fps | 98% |
| Hodgdon H4350 | <<locked>> | 84% | 46,296 psi | 90% | 2575 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 45,411 psi | 88% | 2566 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,600 psi | 89% | 2638 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,303 psi | 71% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 46,137 psi | 90% | 2559 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,266 psi | 86% | 2503 fps | 97.4% |
| IMR 4831 | <<locked>> | 88% | 45,020 psi | 87% | 2572 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 44,150 psi | 86% | 2503 fps | 98.6% |
| Lovex S070 | <<locked>> | 86% | 44,962 psi | 87% | 2539 fps | 97.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,902 psi | 83% | 2536 fps | 98.1% |
| Norma 204 | <<locked>> | 88% | 45,948 psi | 89% | 2595 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 44,266 psi | 86% | 2661 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 46,543 psi | 90% | 2612 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 45,150 psi | 88% | 2605 fps | 98.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,744 psi | 87% | 2621 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 72% | 1693 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 45,237 psi | 88% | 2641 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 43,613 psi | 85% | 2585 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,614 psi | 89% | 2657 fps | 99.4% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,205 psi | 80% | 2631 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 82% | 45,585 psi | 89% | 2543 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 43,758 psi | 85% | 2575 fps | 96% |
| Rottweil R 907 | <<locked>> | 84% | 45,614 psi | 89% | 2526 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,150 psi | 86% | 2503 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 86% | 44,962 psi | 87% | 2539 fps | 97.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 46,485 psi | 90% | 2507 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,427 psi | 90% | 2628 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 46,021 psi | 89% | 2543 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 45,368 psi | 88% | 2618 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 44,382 psi | 86% | 2559 fps | 97% |
| Vihtavuori N150 | <<locked>> | 82% | 43,859 psi | 85% | 2474 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 45,353 psi | 88% | 2559 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 98% | 46,514 psi | 90% | 2585 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 86% | 44,628 psi | 87% | 2562 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 94% | 44,541 psi | 87% | 2618 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 44,396 psi | 86% | 2526 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 46,340 psi | 90% | 2618 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,700 psi | 85% | 2746 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>> | 88% | 34,301 psi | 67% | 2362 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 35,882 psi | 70% | 2408 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 42,598 psi | 83% | 2549 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,540 psi | 83% | 2546 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,259 psi | 68% | 2418 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,740 psi | 77% | 2536 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,047 psi | 82% | 2539 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,061 psi | 82% | 2585 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,657 psi | 50% | 2182 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,895 psi | 64% | 2398 fps | 95.5% |
| Alliant Reloder-26 | 43.4 gr | 84% | 31,183 psi | 61% | 2395 fps | 95.7% |
| Bofors RP15 | <<locked>> | 96% | 41,495 psi | 81% | 2572 fps | 95% |
| Bofors RP5 | <<locked>> | 94% | 42,061 psi | 82% | 2585 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,248 psi | 78% | 2425 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 37,869 psi | 74% | 2451 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 40,857 psi | 79% | 2470 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,619 psi | 63% | 2316 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 82% | 39,349 psi | 76% | 2513 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 53% | 1480 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,130 psi | 74% | 2405 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,481 psi | 81% | 2451 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,490 psi | 67% | 2362 fps | 97.6% |
| Lovex S065 | <<locked>> | 80% | 38,986 psi | 76% | 2405 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,405 psi | 73% | 2388 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,359 psi | 65% | 2339 fps | 95.3% |
| Norma 204 | <<locked>> | 86% | 42,931 psi | 83% | 2536 fps | 95.3% |
| Norma MRP | 45.2 gr | 90% | 38,667 psi | 75% | 2546 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 35,853 psi | 70% | 2405 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 80% | 34,577 psi | 67% | 2385 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 98% | 41,669 psi | 81% | 2562 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 54% | 1512 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,250 psi | 82% | 2589 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,462 psi | 69% | 2421 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,722 psi | 67% | 2428 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,290 psi | 74% | 2562 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 42,873 psi | 83% | 2497 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 41,089 psi | 80% | 2523 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,248 psi | 78% | 2425 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,986 psi | 76% | 2405 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 80% | 37,405 psi | 73% | 2388 fps | 95.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,334 psi | 74% | 2356 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,698 psi | 79% | 2520 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 43,033 psi | 84% | 2490 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,300 psi | 63% | 2362 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,102 psi | 76% | 2457 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 41,292 psi | 80% | 2431 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,202 psi | 72% | 2405 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 40,901 psi | 79% | 2484 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 36,564 psi | 71% | 2402 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,036 psi | 54% | 2254 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,289 psi | 70% | 2375 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 37,869 psi | 74% | 2451 fps | 95.8% |
| Winchester StaBALL HD | 41.7 gr | 84% | 25,730 psi | 50% | 2264 fps | 96.1% |
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 53 powders for 6.5 x 58 mm Mauser Port. loaded with the .263 | 140gr | Rhino Solid Shank. Winchester StaBALL HD delivers the highest muzzle velocity at 2,746 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,746 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 140.0 gr projectile in 0.263" calls for a 1:10.0 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 .263 | 140gr | 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.