Load Specifications
Bullet:.257 | 127gr | Hammer HHT
Bullet Manufacturer:Hammer
Bullet Weight:127 gr
Bullet Diameter:0.257"
Bullet Length:<<locked>>
Caliber:.25-06 Rem. load data
Case Length (l3):2.489"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:65.8 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,267 psi
Recommended Twist Rate:1:7.0
Load data in caliber .25-06 Rem. with .257 | 127gr | Hammer HHT bullet and 100 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-26 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 55,985 psi | 86% | 2713 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,508 psi | 88% | 2799 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,912 psi | 86% | 2841 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 56,521 psi | 87% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 58,131 psi | 89% | 2890 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,827 psi | 90% | 2995 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 86% | 56,985 psi | 87% | 2812 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,506 psi | 85% | 2887 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,927 psi | 87% | 2940 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,768 psi | 87% | 2936 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,390 psi | 85% | 2881 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,943 psi | 89% | 2835 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,175 psi | 89% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 58,798 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,478 psi | 87% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,537 psi | 90% | 2930 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,985 psi | 86% | 2933 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,823 psi | 81% | 2858 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,614 psi | 70% | 2792 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,217 psi | 88% | 3002 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,952 psi | 78% | 2851 fps | 98.2% |
| Bofors RP3 | <<locked>> | 86% | 58,885 psi | 90% | 2851 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,985 psi | 86% | 2933 fps | 99% |
| Bofors RP7 | <<locked>> | 90% | 58,001 psi | 89% | 2841 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,295 psi | 69% | 2730 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 86% | 59,001 psi | 90% | 2867 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,681 psi | 87% | 2894 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 56,115 psi | 86% | 2851 fps | 99% |
| Hodgdon H4831 | <<locked>> | 98% | 57,159 psi | 88% | 2884 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,666 psi | 85% | 2861 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,405 psi | 85% | 2815 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,855 psi | 87% | 2851 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,744 psi | 69% | 2828 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 90% | 57,130 psi | 88% | 2930 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 56% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,377 psi | 88% | 2815 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,391 psi | 86% | 2795 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,245 psi | 85% | 2779 fps | 99.5% |
| IMR 4350 | <<locked>> | 92% | 55,564 psi | 85% | 2822 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,275 psi | 86% | 2818 fps | 99.6% |
| IMR 4831 | <<locked>> | 94% | 58,465 psi | 90% | 2877 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,753 psi | 85% | 2831 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,363 psi | 89% | 2867 fps | 97.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,056 psi | 83% | 2907 fps | 97.7% |
| Lovex S060 | <<locked>> | 82% | 57,841 psi | 89% | 2779 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,536 psi | 87% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,057 psi | 86% | 2808 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 57,725 psi | 88% | 2854 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,238 psi | 71% | 2694 fps | 99.2% |
| Norma 201 | <<locked>> | 82% | 57,653 psi | 88% | 2795 fps | 100% |
| Norma 202 | <<locked>> | 82% | 58,450 psi | 90% | 2785 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,421 psi | 88% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,449 psi | 86% | 2874 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 55,666 psi | 85% | 2959 fps | 99.7% |
| Norma URP | <<locked>> | 92% | 56,782 psi | 87% | 2877 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 58,494 psi | 90% | 2871 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,679 psi | 84% | 2930 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 92% | 55,434 psi | 85% | 2877 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,878 psi | 75% | 2802 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,999 psi | 57% | 1795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,332 psi | 85% | 2802 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,231 psi | 86% | 2907 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 58,320 psi | 89% | 2917 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,739 psi | 87% | 2946 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,628 psi | 68% | 2818 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 84% | 58,363 psi | 89% | 2792 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 58,769 psi | 90% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,884 psi | 87% | 2854 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 98% | 57,783 psi | 89% | 2913 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 90% | 58,001 psi | 89% | 2841 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,057 psi | 86% | 2808 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,536 psi | 87% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,725 psi | 88% | 2854 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,811 psi | 87% | 2854 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,696 psi | 88% | 2828 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 58,378 psi | 89% | 2720 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,159 psi | 86% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,666 psi | 85% | 2762 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,290 psi | 88% | 2910 fps | 99.1% |
| Somchem S335 | <<locked>> | 82% | 58,073 psi | 89% | 2717 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 58,508 psi | 90% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,201 psi | 85% | 2795 fps | 97.1% |
| Somchem S365 | <<locked>> | 94% | 56,072 psi | 86% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,189 psi | 89% | 2884 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 82% | 58,972 psi | 90% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 58,943 psi | 90% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,782 psi | 85% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,362 psi | 86% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,929 psi | 90% | 2867 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,911 psi | 83% | 2808 fps | 99% |
| Vihtavuori N540 | <<locked>> | 84% | 57,363 psi | 88% | 2766 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,798 psi | 89% | 2871 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 58,929 psi | 90% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,883 psi | 86% | 2949 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,427 psi | 73% | 2792 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,813 psi | 90% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,681 psi | 87% | 2894 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,356 psi | 74% | 2923 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,928 psi | 89% | 2831 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,856 psi | 90% | 2887 fps | 99.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 52,417 psi | 80% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,517 psi | 77% | 2690 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 32,068 psi | 49% | 2402 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 49,763 psi | 76% | 2677 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,145 psi | 58% | 2556 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 50,836 psi | 78% | 2871 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 47,239 psi | 72% | 2664 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,552 psi | 61% | 2595 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 46,151 psi | 71% | 2756 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,779 psi | 81% | 2877 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 39,885 psi | 61% | 2602 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,688 psi | 73% | 2684 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,010 psi | 78% | 2753 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,188 psi | 57% | 2569 fps | 99% |
| Alliant Reloder-17 | 43.3 gr | 80% | 42,409 psi | 65% | 2690 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,450 psi | 60% | 2592 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,784 psi | 61% | 2641 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,064 psi | 41% | 2326 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,908 psi | 47% | 2444 fps | 95.3% |
| Alliant Reloder-26 | 44.4 gr | 80% | 28,964 psi | 44% | 2428 fps | 95.3% |
| Bofors RP15 | <<locked>> | 92% | 39,247 psi | 60% | 2628 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 47,877 psi | 73% | 2690 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,784 psi | 61% | 2641 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 42,061 psi | 64% | 2572 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 42,395 psi | 65% | 2671 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,457 psi | 74% | 2710 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,350 psi | 62% | 2608 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 80% | 43,105 psi | 66% | 2625 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 92% | 46,311 psi | 71% | 2707 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,501 psi | 74% | 2746 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,621 psi | 53% | 2461 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,040 psi | 81% | 2795 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,102 psi | 60% | 2700 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 39,291 psi | 60% | 2618 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 42% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,925 psi | 83% | 2766 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,705 psi | 76% | 2694 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,953 psi | 80% | 2726 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 37,942 psi | 58% | 2503 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,685 psi | 67% | 2605 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 36,593 psi | 56% | 2510 fps | 98.6% |
| IMR 4895 | <<locked>> | 80% | 52,359 psi | 80% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,167 psi | 74% | 2703 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 44,063 psi | 68% | 2726 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 54,418 psi | 83% | 2730 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,893 psi | 76% | 2690 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,031 psi | 63% | 2552 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 39,146 psi | 60% | 2533 fps | 97% |
| Lovex S071 | <<locked>> | 90% | 33,185 psi | 51% | 2431 fps | 95.9% |
| Norma 201 | <<locked>> | 80% | 54,143 psi | 83% | 2743 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,897 psi | 84% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,372 psi | 77% | 2740 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,016 psi | 61% | 2585 fps | 95.1% |
| Norma MRP | <<locked>> | 86% | 36,143 psi | 55% | 2589 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 37,884 psi | 58% | 2549 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 50,966 psi | 78% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,918 psi | 67% | 2733 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,796 psi | 56% | 2539 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 38,943 psi | 60% | 2612 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,702 psi | 42% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,312 psi | 74% | 2690 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,121 psi | 69% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,130 psi | 58% | 2575 fps | 98.6% |
| ReloadSwiss RS 70 | 44 gr | 80% | 36,912 psi | 57% | 2585 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,013 psi | 55% | 2618 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 51,474 psi | 79% | 2700 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,049 psi | 69% | 2641 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,077 psi | 68% | 2638 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 38,319 psi | 59% | 2569 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 42,061 psi | 64% | 2572 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,031 psi | 63% | 2552 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 49,893 psi | 76% | 2690 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,146 psi | 60% | 2533 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,441 psi | 71% | 2697 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,940 psi | 83% | 2776 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,752 psi | 84% | 2674 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,325 psi | 71% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,219 psi | 62% | 2500 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,872 psi | 63% | 2628 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 54,665 psi | 84% | 2674 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,484 psi | 70% | 2641 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,240 psi | 74% | 2680 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 34,519 psi | 53% | 2510 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,390 psi | 56% | 2500 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 55,390 psi | 85% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,793 psi | 79% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,025 psi | 80% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,323 psi | 66% | 2569 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,465 psi | 60% | 2552 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 38,377 psi | 59% | 2533 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 50,430 psi | 77% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,856 psi | 60% | 2552 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 29,950 psi | 46% | 2398 fps | 97% |
| Vihtavuori N560 | <<locked>> | 92% | 45,092 psi | 69% | 2759 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 44,367 psi | 68% | 2736 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,522 psi | 59% | 2520 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,350 psi | 62% | 2608 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,728 psi | 36% | 2287 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,114 psi | 83% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,205 psi | 63% | 2598 fps | 95.7% |
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 100 powders for .25-06 Rem. loaded with the .257 | 127gr | Hammer HHT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,755 fps to 3,002 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (450 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 127.0 gr projectile in 0.257" calls for a 1:7.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-26, Alliant Reloder-17 rank at the top here: for .25-06 Rem. with the .257 | 127gr | Hammer HHT 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.