Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .263 | 130gr | Rhino Penetrator bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and ReloadSwiss RS 62.
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 3100ᴾ | <<locked>> | 100% | 45,992 psi | 89% | 2667 fps | 97.8% |
| Accurate 4064 | <<locked>> | 82% | 45,759 psi | 89% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 45,179 psi | 88% | 2674 fps | 99% |
| ADI AR 2208 | <<locked>> | 82% | 44,150 psi | 86% | 2575 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,903 psi | 85% | 2595 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,845 psi | 85% | 2677 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 86% | 44,005 psi | 85% | 2700 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,207 psi | 84% | 2690 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,101 psi | 74% | 2592 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 45,339 psi | 88% | 2799 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 44,121 psi | 86% | 2608 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 44,498 psi | 86% | 2579 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 82% | 44,744 psi | 87% | 2612 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 88% | 44,512 psi | 86% | 2661 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 46,340 psi | 90% | 2667 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,077 psi | 86% | 2680 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 70% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 46,427 psi | 90% | 2612 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 44,947 psi | 87% | 2612 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 86% | 46,224 psi | 90% | 2615 fps | 96.8% |
| IMR 4831 | <<locked>> | 92% | 45,890 psi | 89% | 2671 fps | 99.2% |
| Lovex S062 | <<locked>> | 82% | 46,209 psi | 90% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 45,934 psi | 89% | 2612 fps | 98.1% |
| Lovex S070 | <<locked>> | 90% | 46,398 psi | 90% | 2641 fps | 97.2% |
| Norma 203B | <<locked>> | 82% | 46,586 psi | 90% | 2651 fps | 99.8% |
| Norma MRP | <<locked>> | 98% | 45,281 psi | 88% | 2756 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 44,599 psi | 87% | 2661 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 92% | 46,441 psi | 90% | 2707 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 71% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,904 psi | 87% | 2595 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,642 psi | 85% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,860 psi | 87% | 2690 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 44,048 psi | 86% | 2703 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 84% | 44,309 psi | 86% | 2605 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 86% | 44,498 psi | 86% | 2579 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 45,934 psi | 89% | 2612 fps | 98.1% |
| Shooters World Precision | <<locked>> | 82% | 46,209 psi | 90% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 46,398 psi | 90% | 2641 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 45,513 psi | 88% | 2657 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 46,325 psi | 90% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,513 psi | 88% | 2562 fps | 96.7% |
| Somchem S355 | <<locked>> | 84% | 44,918 psi | 87% | 2608 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 45,948 psi | 89% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 45,716 psi | 89% | 2657 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 86% | 45,614 psi | 89% | 2589 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,845 psi | 85% | 2612 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 90% | 45,905 psi | 89% | 2664 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 98% | 45,034 psi | 87% | 2713 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 46,325 psi | 90% | 2638 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,817 psi | 87% | 2667 fps | 96.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,972 psi | 76% | 2720 fps | 99.9% |
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>> | 94% | 37,463 psi | 73% | 2507 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,018 psi | 84% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,894 psi | 62% | 2392 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 41,234 psi | 80% | 2520 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,249 psi | 80% | 2546 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,155 psi | 62% | 2408 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,926 psi | 70% | 2533 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,108 psi | 55% | 2323 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,911 psi | 70% | 2539 fps | 95.3% |
| Alliant Reloder-26 | 45 gr | 90% | 34,258 psi | 67% | 2549 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 41,089 psi | 80% | 2552 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 41,872 psi | 81% | 2530 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 41,989 psi | 82% | 2559 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 41,829 psi | 81% | 2608 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,501 psi | 57% | 2310 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 86% | 41,147 psi | 80% | 2621 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 52% | 1512 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,279 psi | 84% | 2552 fps | 99.2% |
| IMR 4350 | <<locked>> | 88% | 42,003 psi | 82% | 2552 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,727 psi | 79% | 2507 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 31,067 psi | 60% | 2356 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 43,439 psi | 84% | 2556 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,737 psi | 69% | 2405 fps | 95.3% |
| Lovex S070 | <<locked>> | 84% | 38,638 psi | 75% | 2487 fps | 95% |
| Norma 203B | <<locked>> | 80% | 43,511 psi | 85% | 2595 fps | 99.5% |
| Norma MRP | <<locked>> | 96% | 42,279 psi | 82% | 2694 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,184 psi | 63% | 2392 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 86% | 38,087 psi | 74% | 2539 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 53% | 1552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,032 psi | 82% | 2539 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,247 psi | 74% | 2592 fps | 100% |
| ReloadSwiss RS 62 | 40 gr | 82% | 33,968 psi | 66% | 2464 fps | 95.8% |
| ReloadSwiss RS 70 | 41.7 gr | 84% | 36,172 psi | 70% | 2530 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,725 psi | 75% | 2497 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 41,872 psi | 81% | 2530 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,737 psi | 69% | 2405 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 43,439 psi | 84% | 2556 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 38,638 psi | 75% | 2487 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,885 psi | 77% | 2552 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,814 psi | 79% | 2434 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,929 psi | 78% | 2457 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 39,363 psi | 76% | 2500 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 28,863 psi | 56% | 2346 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 42,627 psi | 83% | 2602 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 37,478 psi | 73% | 2438 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 33,475 psi | 65% | 2395 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 33,243 psi | 65% | 2402 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 30,458 psi | 59% | 2398 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,228 psi | 65% | 2375 fps | 98% |
| Winchester 760 | <<locked>> | 84% | 39,276 psi | 76% | 2556 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,195 psi | 55% | 2402 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 51 powders for 6.5 x 58 mm Mauser Port. loaded with the .263 | 130gr | Rhino Penetrator. Alliant Reloder-26 delivers the highest muzzle velocity at 2,799 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,799 fps. Accurate 3100 gives the best case fill at 100 %, and 51 of the 51 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 130.0 gr projectile in 0.263" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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, ReloadSwiss RS 70, ReloadSwiss RS 62 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .263 | 130gr | Rhino Penetrator 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.