Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 120gr | Frontier BTSP bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and Alliant Reloder-26.
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>> | 82% | 45,934 psi | 89% | 2674 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,076 psi | 84% | 2713 fps | 96.3% |
| Accurate 4064 | <<locked>> | 84% | 46,470 psi | 90% | 2723 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 45,469 psi | 88% | 2782 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 84% | 44,831 psi | 87% | 2690 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 45,426 psi | 88% | 2831 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 44,672 psi | 87% | 2717 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 44,976 psi | 87% | 2726 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,454 psi | 86% | 2792 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 44,411 psi | 86% | 2815 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,756 psi | 79% | 2740 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,934 psi | 89% | 2910 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 44,802 psi | 87% | 2726 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 45,484 psi | 88% | 2730 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,830 psi | 85% | 2726 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 46,035 psi | 89% | 2776 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 69% | 1765 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,019 psi | 85% | 2667 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 46,209 psi | 90% | 2779 fps | 98.7% |
| IMR 4895 | <<locked>> | 82% | 46,108 psi | 90% | 2759 fps | 99.4% |
| Lovex S062 | <<locked>> | 82% | 44,063 psi | 86% | 2674 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 46,340 psi | 90% | 2720 fps | 97.4% |
| Lovex S070 | <<locked>> | 90% | 44,266 psi | 86% | 2700 fps | 95.8% |
| Norma 203B | <<locked>> | 82% | 44,295 psi | 86% | 2717 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 45,049 psi | 87% | 2772 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 82% | 44,077 psi | 86% | 2733 fps | 99% |
| Ramshot Hunter | <<locked>> | 92% | 43,961 psi | 85% | 2762 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,172 psi | 70% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,701 psi | 89% | 2710 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,164 psi | 86% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 45,252 psi | 88% | 2802 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 44,715 psi | 87% | 2815 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 82% | 46,108 psi | 90% | 2690 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 86% | 44,672 psi | 87% | 2717 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 46,340 psi | 90% | 2720 fps | 97.4% |
| Shooters World Precision | <<locked>> | 82% | 44,063 psi | 86% | 2674 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 90% | 44,266 psi | 86% | 2700 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 46,064 psi | 89% | 2772 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,309 psi | 86% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,050 psi | 89% | 2667 fps | 96% |
| Somchem S355 | <<locked>> | 86% | 45,382 psi | 88% | 2720 fps | 99.5% |
| Somchem S365 | <<locked>> | 96% | 46,137 psi | 90% | 2831 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 45,818 psi | 89% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 46,427 psi | 90% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 46,369 psi | 90% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 44,338 psi | 86% | 2723 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 44,614 psi | 87% | 2667 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 46,325 psi | 90% | 2776 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,962 psi | 87% | 2818 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,063 psi | 86% | 2697 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,608 psi | 71% | 2746 fps | 99% |
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% | 43,120 psi | 84% | 2625 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 40,045 psi | 78% | 2654 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 40,770 psi | 79% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,418 psi | 67% | 2549 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 39,407 psi | 77% | 2582 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,409 psi | 82% | 2772 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,233 psi | 76% | 2608 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,003 psi | 82% | 2671 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,621 psi | 67% | 2562 fps | 95.6% |
| Alliant Reloder-17 | 39.6 gr | 80% | 33,982 psi | 66% | 2575 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,965 psi | 58% | 2464 fps | 95.2% |
| Alliant Reloder-26 | 47.7 gr | 94% | 37,217 psi | 72% | 2710 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 38,899 psi | 76% | 2608 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 80% | 39,929 psi | 78% | 2618 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,805 psi | 58% | 2405 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,975 psi | 83% | 2720 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 52% | 1578 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,394 psi | 80% | 2618 fps | 98.3% |
| IMR 4831 | <<locked>> | 84% | 33,504 psi | 65% | 2510 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 43,047 psi | 84% | 2700 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 41,452 psi | 81% | 2621 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 38,725 psi | 75% | 2566 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 41,684 psi | 81% | 2648 fps | 95% |
| Norma 203B | <<locked>> | 80% | 41,408 psi | 80% | 2657 fps | 98.6% |
| Norma URP | <<locked>> | 84% | 34,751 psi | 67% | 2552 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 41,162 psi | 80% | 2674 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 41,147 psi | 80% | 2703 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 53% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,263 psi | 78% | 2598 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,172 psi | 70% | 2644 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,666 psi | 71% | 2625 fps | 95.9% |
| ReloadSwiss RS 70 | 44.2 gr | 88% | 39,073 psi | 76% | 2690 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 43,352 psi | 84% | 2641 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 36,680 psi | 71% | 2556 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,725 psi | 75% | 2566 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 41,452 psi | 81% | 2621 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 41,684 psi | 81% | 2648 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,753 psi | 73% | 2605 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,059 psi | 76% | 2503 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,236 psi | 84% | 2615 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 37,463 psi | 73% | 2559 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 27,267 psi | 53% | 2385 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 42,989 psi | 83% | 2621 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,381 psi | 84% | 2628 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,592 psi | 69% | 2493 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 82% | 33,968 psi | 66% | 2500 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 42,003 psi | 82% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,766 psi | 69% | 2556 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 90% | 32,372 psi | 63% | 2543 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,546 psi | 61% | 2421 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,182 psi | 59% | 2546 fps | 95.9% |
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 .264 | 120gr | Frontier BTSP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,910 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,910 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 69–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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 70, Alliant Reloder-17, Alliant Reloder-26 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 120gr | Frontier BTSP 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.