Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:120 gr
Bullet Diameter:0.257"
Bullet Length:<<locked>>
Caliber:.25 x 47 Lapua load data
Case Length (l3):1.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:48 Grains of Water
Primer Size:Small Rifle (SR)
Barrel Length:30"
Max. allowed Pressure:63,091 psi
Recommended Twist Rate:1:10.0
Load data in caliber .25 x 47 Lapua with .257 | 120gr | Sierra HPBT GameKing bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 30"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 55,956 psi | 89% | 2789 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,186 psi | 86% | 2818 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,172 psi | 86% | 2815 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,043 psi | 89% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,679 psi | 85% | 2815 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,623 psi | 60% | 2661 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 53,679 psi | 85% | 2858 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,127 psi | 84% | 2946 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 54,636 psi | 87% | 2897 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 55,564 psi | 88% | 2894 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,722 psi | 85% | 2844 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,273 psi | 86% | 2815 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,448 psi | 88% | 2953 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,317 psi | 86% | 3025 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,390 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,376 psi | 88% | 2789 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,028 psi | 89% | 2940 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,576 psi | 82% | 2956 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,028 psi | 89% | 3045 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,492 psi | 58% | 2694 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,538 psi | 64% | 2851 fps | 98.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,072 psi | 90% | 2766 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,462 psi | 86% | 2917 fps | 99.9% |
| Bofors RP3 | <<locked>> | 94% | 55,912 psi | 89% | 2933 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,362 psi | 89% | 2904 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,666 psi | 88% | 2825 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,550 psi | 90% | 2930 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,013 psi | 87% | 2986 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 54,447 psi | 86% | 2835 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,637 psi | 88% | 2867 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,087 psi | 90% | 2949 fps | 99.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,579 psi | 90% | 3005 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 96% | 53,664 psi | 85% | 2907 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 88% | 55,129 psi | 87% | 2907 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,543 psi | 75% | 2825 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,244 psi | 86% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,824 psi | 85% | 2989 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 56% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,507 psi | 90% | 2910 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,259 psi | 88% | 2887 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,434 psi | 88% | 2881 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,564 psi | 88% | 2861 fps | 98.6% |
| IMR 4198 | <<locked>> | 82% | 55,550 psi | 88% | 2743 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,910 psi | 84% | 2877 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,071 psi | 87% | 2890 fps | 98.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,589 psi | 80% | 2890 fps | 99.8% |
| IMR 4895 | <<locked>> | 90% | 53,954 psi | 86% | 2920 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 53,722 psi | 85% | 2844 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,867 psi | 85% | 2828 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,230 psi | 86% | 2867 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,621 psi | 87% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 54,766 psi | 87% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,128 psi | 86% | 2881 fps | 99.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,853 psi | 87% | 2913 fps | 98.8% |
| Norma 201 | <<locked>> | 88% | 53,650 psi | 85% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,157 psi | 86% | 2844 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,172 psi | 87% | 2927 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 53,432 psi | 85% | 2927 fps | 96.7% |
| Norma URPᴾ | <<locked>> | 100% | 52,504 psi | 83% | 2940 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 92% | 55,782 psi | 88% | 2953 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,271 psi | 81% | 2933 fps | 98.9% |
| Ramshot TAC | <<locked>> | 86% | 54,128 psi | 86% | 2871 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,087 psi | 90% | 2936 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,882 psi | 87% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,766 psi | 57% | 1775 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,927 psi | 90% | 2874 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,070 psi | 86% | 2881 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,536 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,999 psi | 89% | 3045 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,649 psi | 83% | 2969 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,968 psi | 84% | 3002 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 86% | 54,491 psi | 86% | 2818 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,795 psi | 85% | 2835 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,767 psi | 88% | 2920 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,362 psi | 89% | 2904 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,128 psi | 86% | 2881 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,230 psi | 86% | 2867 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,766 psi | 87% | 2871 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,853 psi | 87% | 2913 fps | 98.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,695 psi | 90% | 2848 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,809 psi | 85% | 2933 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,449 psi | 89% | 2812 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,202 psi | 89% | 2900 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,623 psi | 90% | 2920 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,172 psi | 87% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,274 psi | 88% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,491 psi | 86% | 2828 fps | 98.4% |
| Somchem S321 | <<locked>> | 84% | 55,100 psi | 87% | 2884 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,665 psi | 87% | 2776 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,593 psi | 88% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 56,231 psi | 89% | 2920 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,847 psi | 74% | 2887 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 43,540 psi | 69% | 2762 fps | 96% |
| Vihtavuori N130 | <<locked>> | 84% | 54,998 psi | 87% | 2733 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,303 psi | 88% | 2756 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,695 psi | 90% | 2838 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,288 psi | 86% | 2815 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,215 psi | 86% | 2848 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,013 psi | 87% | 2930 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 86% | 54,317 psi | 86% | 2848 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,941 psi | 89% | 2864 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,172 psi | 86% | 2943 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,392 psi | 62% | 2769 fps | 98.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,564 psi | 88% | 2907 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,867 psi | 85% | 2894 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,579 psi | 90% | 3005 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,692 psi | 52% | 2700 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,608 psi | 90% | 2930 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 30"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 46,485 psi | 74% | 2657 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,473 psi | 80% | 2766 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,117 psi | 62% | 2589 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,788 psi | 73% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,135 psi | 70% | 2657 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 35,070 psi | 56% | 2605 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 36,956 psi | 59% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 30,458 psi | 48% | 2513 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 42,786 psi | 68% | 2700 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 36,245 psi | 57% | 2549 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,860 psi | 71% | 2703 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 44,570 psi | 71% | 2680 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,344 psi | 83% | 2907 fps | 100% |
| Alliant Power Pro 2000-MR | 33.9 gr | 80% | 38,479 psi | 61% | 2726 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,621 psi | 56% | 2572 fps | 99% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,330 psi | 83% | 2749 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,580 psi | 61% | 2638 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 31,633 psi | 50% | 2533 fps | 95.9% |
| Alliant Reloder-17 | 33.4 gr | 80% | 30,763 psi | 49% | 2543 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,224 psi | 43% | 2438 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 94% | 32,924 psi | 52% | 2664 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,809 psi | 85% | 2723 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,756 psi | 66% | 2703 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 35,215 psi | 56% | 2575 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 41,365 psi | 66% | 2648 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,615 psi | 74% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,149 psi | 68% | 2723 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,500 psi | 75% | 2867 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 50,966 psi | 81% | 2785 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,793 psi | 82% | 2815 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,042 psi | 57% | 2575 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 88% | 38,116 psi | 60% | 2677 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 90% | 44,411 psi | 70% | 2746 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,163 psi | 68% | 2710 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,108 psi | 43% | 2379 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,957 psi | 62% | 2684 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 40,393 psi | 64% | 2740 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 41% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,118 psi | 65% | 2657 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 42,540 psi | 67% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,014 psi | 60% | 2582 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,727 psi | 65% | 2602 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 52,475 psi | 83% | 2703 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 41,191 psi | 65% | 2671 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 40,408 psi | 64% | 2628 fps | 95.4% |
| IMR 4831 | <<locked>> | 84% | 29,834 psi | 47% | 2474 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,479 psi | 63% | 2671 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 44,860 psi | 71% | 2703 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 50,531 psi | 80% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,452 psi | 66% | 2674 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,946 psi | 68% | 2631 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 37,971 psi | 60% | 2589 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 35,186 psi | 56% | 2530 fps | 95.5% |
| Lovex S070 | <<locked>> | 88% | 37,855 psi | 60% | 2608 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,930 psi | 66% | 2651 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 41,872 psi | 66% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,942 psi | 60% | 2628 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 46,905 psi | 74% | 2815 fps | 95.3% |
| Norma URP | <<locked>> | 84% | 31,372 psi | 50% | 2520 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,130 psi | 59% | 2635 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 37,231 psi | 59% | 2664 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,425 psi | 70% | 2707 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,816 psi | 69% | 2726 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,225 psi | 76% | 2749 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 42% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,169 psi | 80% | 2779 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 36,593 psi | 58% | 2559 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,074 psi | 64% | 2736 fps | 98.9% |
| ReloadSwiss RS 60 | 33.4 gr | 80% | 32,764 psi | 52% | 2608 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 30,458 psi | 48% | 2526 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 33,257 psi | 53% | 2592 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 45,890 psi | 73% | 2687 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,769 psi | 63% | 2602 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,112 psi | 52% | 2520 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 41,365 psi | 66% | 2648 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 35,186 psi | 56% | 2530 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,452 psi | 66% | 2674 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,971 psi | 60% | 2589 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 37,855 psi | 60% | 2608 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,765 psi | 84% | 2792 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,127 psi | 54% | 2572 fps | 97.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,866 psi | 84% | 2762 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,815 psi | 68% | 2684 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,133 psi | 65% | 2667 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,163 psi | 68% | 2595 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,781 psi | 57% | 2467 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 39,146 psi | 62% | 2572 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 48,283 psi | 77% | 2782 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,960 psi | 68% | 2602 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,511 psi | 67% | 2680 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 34,214 psi | 54% | 2533 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 24,729 psi | 39% | 2365 fps | 96.3% |
| Somchem S385 | <<locked>> | 98% | 40,828 psi | 65% | 2710 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 48,776 psi | 77% | 2651 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,439 psi | 69% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,030 psi | 62% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,711 psi | 63% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,372 psi | 51% | 2464 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 30,589 psi | 48% | 2464 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,730 psi | 71% | 2697 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,116 psi | 60% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,184 psi | 51% | 2526 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 28,616 psi | 45% | 2507 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,906 psi | 46% | 2392 fps | 96.8% |
| Winchester 748 | <<locked>> | 80% | 43,990 psi | 70% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 38,116 psi | 60% | 2677 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,006 psi | 43% | 2507 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,509 psi | 64% | 2671 fps | 99.6% |
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 108 powders for .25 x 47 Lapua loaded with the .257 | 120gr | Sierra HPBT GameKing. Alliant Reloder-17 delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,045 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.257" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .25 x 47 Lapua with the .257 | 120gr | Sierra HPBT GameKing 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.