Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 120gr | Barnes TAC-TX BT bullet and 53 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 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 2495 | <<locked>> | 82% | 44,643 psi | 87% | 2661 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,916 psi | 81% | 2697 fps | 96% |
| Accurate 4064 | <<locked>> | 84% | 44,947 psi | 87% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 44,440 psi | 86% | 2769 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 43,961 psi | 85% | 2680 fps | 98.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 44,773 psi | 87% | 2828 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 43,656 psi | 85% | 2703 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 82% | 43,961 psi | 85% | 2717 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 46,572 psi | 90% | 2841 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,656 psi | 85% | 2805 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,885 psi | 77% | 2726 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,860 psi | 87% | 2894 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 43,511 psi | 85% | 2710 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 44,353 psi | 86% | 2717 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 45,948 psi | 89% | 2772 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 45,324 psi | 88% | 2769 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,476 psi | 69% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 46,195 psi | 90% | 2717 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,021 psi | 89% | 2687 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,253 psi | 90% | 2720 fps | 95.9% |
| IMR 4831 | <<locked>> | 94% | 45,339 psi | 88% | 2769 fps | 98.6% |
| IMR 4895 | <<locked>> | 82% | 45,049 psi | 87% | 2746 fps | 99.3% |
| Lovex S062 | <<locked>> | 84% | 46,050 psi | 89% | 2717 fps | 99.9% |
| Lovex S065 | <<locked>> | 90% | 45,498 psi | 88% | 2713 fps | 97.3% |
| Lovex S070 | <<locked>> | 92% | 46,166 psi | 90% | 2743 fps | 96.3% |
| Norma 203B | <<locked>> | 84% | 46,354 psi | 90% | 2762 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 44,251 psi | 86% | 2762 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 84% | 46,470 psi | 90% | 2782 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 94% | 46,238 psi | 90% | 2812 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 70% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,947 psi | 87% | 2703 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 46,543 psi | 90% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 44,338 psi | 86% | 2792 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,918 psi | 85% | 2805 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 82% | 44,962 psi | 87% | 2677 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 88% | 46,557 psi | 90% | 2759 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,498 psi | 88% | 2713 fps | 97.3% |
| Shooters World Precision | <<locked>> | 84% | 46,050 psi | 89% | 2717 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 92% | 46,166 psi | 90% | 2743 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 45,324 psi | 88% | 2766 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 46,238 psi | 90% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,194 psi | 88% | 2661 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 44,237 psi | 86% | 2707 fps | 99.4% |
| Somchem S365 | <<locked>> | 96% | 45,252 psi | 88% | 2822 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 44,730 psi | 87% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 45,455 psi | 88% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 45,266 psi | 88% | 2694 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 46,427 psi | 90% | 2769 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 43,903 psi | 85% | 2661 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 45,455 psi | 88% | 2766 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,888 psi | 85% | 2805 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 46,340 psi | 90% | 2746 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,679 psi | 69% | 2726 fps | 98.8% |
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% | 41,495 psi | 81% | 2608 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 38,899 psi | 76% | 2638 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 39,291 psi | 76% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,402 psi | 65% | 2533 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,841 psi | 75% | 2575 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,742 psi | 81% | 2762 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,493 psi | 75% | 2598 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,292 psi | 80% | 2664 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,678 psi | 65% | 2546 fps | 95.2% |
| Alliant Reloder-17 | 39.8 gr | 80% | 33,011 psi | 64% | 2556 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,937 psi | 60% | 2500 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,216 psi | 70% | 2694 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 37,942 psi | 74% | 2598 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 80% | 38,783 psi | 75% | 2602 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,037 psi | 56% | 2392 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,264 psi | 82% | 2713 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 51% | 1578 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,756 psi | 79% | 2612 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,033 psi | 84% | 2628 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,236 psi | 84% | 2661 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 34,824 psi | 68% | 2549 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 42,322 psi | 82% | 2694 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 40,364 psi | 78% | 2608 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 37,623 psi | 73% | 2552 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 43,410 psi | 84% | 2690 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 40,640 psi | 79% | 2651 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 33,750 psi | 66% | 2533 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 40,451 psi | 79% | 2664 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 40,335 psi | 78% | 2694 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 52% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,003 psi | 82% | 2644 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,230 psi | 68% | 2628 fps | 99.5% |
| ReloadSwiss RS 62 | 42.8 gr | 86% | 35,737 psi | 69% | 2608 fps | 95.6% |
| ReloadSwiss RS 70 | 44.5 gr | 88% | 38,305 psi | 74% | 2677 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 42,264 psi | 82% | 2628 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,737 psi | 69% | 2543 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,623 psi | 73% | 2552 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 40,364 psi | 78% | 2608 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 43,410 psi | 84% | 2690 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,782 psi | 71% | 2592 fps | 97.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,174 psi | 74% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,409 psi | 82% | 2608 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 36,376 psi | 71% | 2543 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 26,440 psi | 51% | 2369 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 41,901 psi | 81% | 2608 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,699 psi | 83% | 2625 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,824 psi | 68% | 2487 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 35,447 psi | 69% | 2543 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 41,002 psi | 80% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,693 psi | 67% | 2536 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 92% | 33,504 psi | 65% | 2579 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,835 psi | 60% | 2408 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,254 psi | 57% | 2523 fps | 95.3% |
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 .264 | 120gr | Barnes TAC-TX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,894 fps; across all powders the maximum-charge window runs from 1,768 fps to 2,894 fps. Accurate 3100 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 69–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:9.0 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, ReloadSwiss RS 62 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 120gr | Barnes TAC-TX BT 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.