Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 121gr | Warner Tool Co. Flat Line bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Alliant Reloder-17.
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 2495 | <<locked>> | 84% | 45,440 psi | 88% | 2635 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 45,469 psi | 88% | 2674 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 44,237 psi | 86% | 2726 fps | 97.9% |
| ADI AR 2206H | <<locked>> | 82% | 46,238 psi | 90% | 2694 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 86% | 44,324 psi | 86% | 2644 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 44,918 psi | 87% | 2782 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 44,005 psi | 85% | 2667 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 84% | 44,585 psi | 87% | 2684 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 46,470 psi | 90% | 2789 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 43,874 psi | 85% | 2766 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,550 psi | 73% | 2628 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,669 psi | 81% | 2779 fps | 96.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 45,426 psi | 88% | 2697 fps | 98.2% |
| Bofors RP3 | <<locked>> | 86% | 43,801 psi | 85% | 2674 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 86% | 44,788 psi | 87% | 2677 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 45,847 psi | 89% | 2726 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 45,455 psi | 88% | 2733 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,447 psi | 69% | 1722 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 44,860 psi | 87% | 2657 fps | 99.2% |
| IMR 3031 | <<locked>> | 82% | 46,282 psi | 90% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 46,586 psi | 90% | 2677 fps | 98.9% |
| IMR 4831 | <<locked>> | 96% | 45,237 psi | 88% | 2726 fps | 98.2% |
| IMR 4895 | <<locked>> | 84% | 45,701 psi | 89% | 2713 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 82% | 45,411 psi | 88% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 46,224 psi | 90% | 2628 fps | 99.1% |
| Lovex S062 | <<locked>> | 86% | 46,499 psi | 90% | 2680 fps | 99.8% |
| Lovex S065 | <<locked>> | 92% | 45,948 psi | 89% | 2674 fps | 96.9% |
| Lovex S070 | <<locked>> | 94% | 46,514 psi | 90% | 2703 fps | 95.8% |
| Norma 201 | <<locked>> | 82% | 45,223 psi | 88% | 2644 fps | 99.6% |
| Norma 202 | <<locked>> | 82% | 45,513 psi | 88% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 86% | 46,572 psi | 90% | 2720 fps | 99.2% |
| Norma URP | <<locked>> | 94% | 44,237 psi | 86% | 2723 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 84% | 43,366 psi | 84% | 2684 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 96% | 45,977 psi | 89% | 2759 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,607 psi | 69% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 45,310 psi | 88% | 2661 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 43,700 psi | 85% | 2730 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 43,772 psi | 85% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,034 psi | 86% | 2746 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,237 psi | 86% | 2759 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 45,629 psi | 89% | 2644 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 88% | 44,034 psi | 86% | 2671 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,948 psi | 89% | 2674 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 45,411 psi | 88% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 46,499 psi | 90% | 2680 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 94% | 46,514 psi | 90% | 2703 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 45,165 psi | 88% | 2723 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 44,498 psi | 86% | 2657 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 46,557 psi | 90% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 43,961 psi | 85% | 2559 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 46,195 psi | 90% | 2598 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 46,296 psi | 90% | 2680 fps | 99.1% |
| Somchem S355 | <<locked>> | 88% | 44,846 psi | 87% | 2674 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 44,889 psi | 87% | 2776 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 84% | 45,310 psi | 88% | 2628 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 46,093 psi | 90% | 2638 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 45,513 psi | 88% | 2654 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 94% | 46,238 psi | 90% | 2720 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 44,135 psi | 86% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 45,484 psi | 88% | 2723 fps | 97.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,654 psi | 79% | 2707 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 46,514 psi | 90% | 2703 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,388 psi | 65% | 2605 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 82% | 44,034 psi | 86% | 2664 fps | 99.2% |
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 2495 | <<locked>> | 80% | 39,900 psi | 77% | 2539 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,695 psi | 73% | 2533 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,969 psi | 70% | 2556 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 43,308 psi | 84% | 2641 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 36,927 psi | 72% | 2490 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,320 psi | 76% | 2661 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,245 psi | 70% | 2510 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,088 psi | 76% | 2572 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,303 psi | 71% | 2569 fps | 95.7% |
| Alliant Reloder-17 | 36.5 gr | 80% | 31,357 psi | 61% | 2467 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,154 psi | 61% | 2464 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,682 psi | 75% | 2707 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,583 psi | 83% | 2644 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 35,969 psi | 70% | 2516 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 80% | 36,927 psi | 72% | 2516 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,256 psi | 61% | 2411 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,755 psi | 77% | 2621 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 51% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,959 psi | 81% | 2602 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 43,120 psi | 84% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,711 psi | 75% | 2523 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 34,708 psi | 67% | 2510 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 40,030 psi | 78% | 2605 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 42,409 psi | 82% | 2621 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 43,613 psi | 85% | 2582 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 38,696 psi | 75% | 2533 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 40,669 psi | 79% | 2572 fps | 95.4% |
| Lovex S070 | <<locked>> | 92% | 43,569 psi | 85% | 2648 fps | 95% |
| Norma 201 | <<locked>> | 80% | 42,612 psi | 83% | 2598 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 42,598 psi | 83% | 2602 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,464 psi | 75% | 2562 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 36,390 psi | 71% | 2559 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,000 psi | 74% | 2572 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 43,091 psi | 84% | 2703 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,731 psi | 52% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,453 psi | 82% | 2605 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,712 psi | 79% | 2667 fps | 97.7% |
| ReloadSwiss RS 60 | 36.5 gr | 80% | 33,388 psi | 65% | 2536 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,694 psi | 69% | 2569 fps | 95% |
| ReloadSwiss RS 70 | 41.7 gr | 90% | 38,566 psi | 75% | 2635 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 40,567 psi | 79% | 2549 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 33,736 psi | 66% | 2454 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,669 psi | 79% | 2572 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,409 psi | 82% | 2621 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,696 psi | 75% | 2533 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 43,569 psi | 85% | 2648 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,635 psi | 67% | 2500 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,727 psi | 81% | 2608 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,816 psi | 85% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,376 psi | 71% | 2418 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,642 psi | 85% | 2556 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,352 psi | 84% | 2625 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 34,838 psi | 68% | 2467 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 28,645 psi | 56% | 2398 fps | 96% |
| Vihtavuori N135 | <<locked>> | 80% | 39,755 psi | 77% | 2533 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,321 psi | 78% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,895 psi | 64% | 2402 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 35,578 psi | 69% | 2503 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 39,030 psi | 76% | 2530 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 37,347 psi | 73% | 2559 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 33,388 psi | 65% | 2539 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,328 psi | 61% | 2379 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,343 psi | 61% | 2539 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,205 psi | 80% | 2612 fps | 98.7% |
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 64 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 121gr | Warner Tool Co. Flat Line. Alliant Reloder-16 delivers the highest muzzle velocity at 2,789 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,789 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 64 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 121.0 gr projectile in 0.264" calls for a 1:6.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. ReloadSwiss RS 60, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 121gr | Warner Tool Co. Flat Line 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.