Load Specifications
Bullet Manufacturer:Fox Bullets
Bullet Weight:100 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:1:9.0
Load data in caliber .25 x 47 Lapua with .257 | 100gr | Fox Classic Hunter bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon LEVERevolution.
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>> | 90% | 56,521 psi | 90% | 3074 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 56,420 psi | 89% | 3186 fps | 99.5% |
| Accurate 2460 | <<locked>> | 86% | 55,013 psi | 87% | 3104 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 53,882 psi | 85% | 3091 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,826 psi | 90% | 3169 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 54,882 psi | 87% | 3071 fps | 95.8% |
| Accurate 4064 | <<locked>> | 98% | 57,087 psi | 90% | 3186 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,788 psi | 73% | 3084 fps | 98% |
| Accurate LT-30 | <<locked>> | 84% | 56,405 psi | 89% | 3018 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,797 psi | 90% | 3045 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 55,463 psi | 88% | 3176 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 98% | 56,507 psi | 90% | 3169 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 84% | 56,811 psi | 90% | 3150 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,853 psi | 87% | 3130 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 54,520 psi | 86% | 3104 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 56,086 psi | 89% | 3245 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,882 psi | 87% | 3294 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,651 psi | 88% | 3192 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,449 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 56,449 psi | 89% | 3215 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,629 psi | 72% | 3094 fps | 98.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,997 psi | 84% | 3261 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,274 psi | 88% | 3009 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 55,056 psi | 87% | 3186 fps | 99.3% |
| Bofors RP3 | <<locked>> | 98% | 56,289 psi | 89% | 3209 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 53,563 psi | 85% | 3104 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 90% | 56,913 psi | 90% | 3110 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 53,693 psi | 85% | 3163 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 55,332 psi | 88% | 3264 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 86% | 55,419 psi | 88% | 3130 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 56,507 psi | 90% | 3156 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,230 psi | 86% | 3166 fps | 98.7% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,255 psi | 78% | 3136 fps | 96% |
| Hodgdon H4895 | <<locked>> | 92% | 55,999 psi | 89% | 3192 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,669 psi | 66% | 2963 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,505 psi | 86% | 3219 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,664 psi | 55% | 1900 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,099 psi | 86% | 3140 fps | 99.8% |
| IMR 3031 | <<locked>> | 92% | 54,955 psi | 87% | 3169 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,985 psi | 89% | 3153 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,869 psi | 90% | 3130 fps | 97.1% |
| IMR 4198 | <<locked>> | 86% | 56,463 psi | 89% | 3038 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 55,811 psi | 88% | 3146 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,656 psi | 69% | 3022 fps | 97.6% |
| IMR 4895 | <<locked>> | 94% | 54,360 psi | 86% | 3196 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 54,853 psi | 87% | 3130 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 54,998 psi | 87% | 3114 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 54,433 psi | 86% | 3146 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,811 psi | 88% | 3100 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 55,448 psi | 88% | 3150 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,169 psi | 81% | 3081 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,312 psi | 77% | 3051 fps | 95.8% |
| Norma 200 | <<locked>> | 82% | 56,231 psi | 89% | 3054 fps | 100% |
| Norma 201 | <<locked>> | 92% | 54,273 psi | 86% | 3120 fps | 100% |
| Norma 202 | <<locked>> | 92% | 54,607 psi | 87% | 3127 fps | 100% |
| Norma 203B | <<locked>> | 96% | 55,535 psi | 88% | 3202 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 45,643 psi | 72% | 3077 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 96% | 56,318 psi | 89% | 3232 fps | 99.8% |
| Ramshot TAC | <<locked>> | 90% | 55,695 psi | 88% | 3146 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 54,534 psi | 86% | 3166 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 88% | 56,304 psi | 89% | 3133 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,722 psi | 55% | 1939 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,375 psi | 86% | 3114 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 54,868 psi | 87% | 3140 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 56,710 psi | 90% | 3291 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 56,579 psi | 90% | 3327 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,469 psi | 72% | 3100 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,717 psi | 74% | 3123 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 90% | 55,085 psi | 87% | 3100 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 54,375 psi | 86% | 3110 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 55,680 psi | 88% | 3189 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 53,563 psi | 85% | 3104 fps | 96% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,169 psi | 81% | 3081 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 54,433 psi | 86% | 3146 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 55,448 psi | 88% | 3150 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,312 psi | 77% | 3051 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,636 psi | 87% | 3084 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,420 psi | 89% | 2740 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 53,664 psi | 85% | 3110 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 53,983 psi | 86% | 3205 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 57,058 psi | 90% | 3100 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 57,072 psi | 90% | 3169 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 53,780 psi | 85% | 3143 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,159 psi | 89% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,086 psi | 89% | 3048 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 51,271 psi | 81% | 3022 fps | 96.1% |
| Somchem S321 | <<locked>> | 88% | 56,231 psi | 89% | 3169 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 55,448 psi | 88% | 3054 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 56,347 psi | 89% | 3159 fps | 99.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 56,405 psi | 89% | 3192 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,553 psi | 64% | 3018 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 88% | 56,130 psi | 89% | 3022 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,014 psi | 89% | 3035 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 56,971 psi | 90% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,085 psi | 87% | 3097 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 54,447 psi | 86% | 3114 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,399 psi | 77% | 3077 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 90% | 55,506 psi | 88% | 3130 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 56,913 psi | 90% | 3150 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,108 psi | 75% | 3081 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,690 psi | 79% | 3061 fps | 99.7% |
| Winchester 748 | <<locked>> | 90% | 54,578 psi | 87% | 3179 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 49,632 psi | 79% | 3143 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 92% | 53,374 psi | 85% | 3150 fps | 99.9% |
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% | 41,452 psi | 66% | 2835 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,953 psi | 84% | 3130 fps | 99.1% |
| Accurate 2460 | <<locked>> | 80% | 44,889 psi | 71% | 2940 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,881 psi | 54% | 2740 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,248 psi | 64% | 2894 fps | 99.7% |
| Accurate 2700 | <<locked>> | 92% | 51,169 psi | 81% | 3012 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 32,053 psi | 51% | 2723 fps | 99.2% |
| Accurate 4350 | <<locked>> | 94% | 36,854 psi | 58% | 2900 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 49,821 psi | 79% | 2920 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,198 psi | 80% | 2943 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,014 psi | 60% | 2844 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 34,374 psi | 54% | 2733 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 49,966 psi | 79% | 3048 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,972 psi | 63% | 2858 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 38,783 psi | 61% | 2858 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,180 psi | 73% | 3071 fps | 99.3% |
| Alliant Power Pro 2000-MR | 35.7 gr | 82% | 36,622 psi | 58% | 2910 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,415 psi | 50% | 2703 fps | 96.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,659 psi | 74% | 2940 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,910 psi | 54% | 2766 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,766 psi | 57% | 2858 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,053 psi | 49% | 2762 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,805 psi | 77% | 2913 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,927 psi | 59% | 2835 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 30,487 psi | 48% | 2694 fps | 96% |
| Bofors RP7 | <<locked>> | 98% | 50,285 psi | 80% | 3048 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,061 psi | 67% | 2854 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,029 psi | 60% | 2871 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,655 psi | 66% | 3009 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 80% | 45,701 psi | 72% | 2976 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,180 psi | 73% | 2992 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 38,827 psi | 62% | 2874 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 98% | 46,253 psi | 73% | 3077 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 38,247 psi | 61% | 2858 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,632 psi | 49% | 2690 fps | 95% |
| Hodgdon LEVERevolution | 34.1 gr | 80% | 34,069 psi | 54% | 2808 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,585 psi | 41% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,898 psi | 58% | 2805 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 37,115 psi | 59% | 2864 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,808 psi | 54% | 2713 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,050 psi | 75% | 2959 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 47,340 psi | 75% | 2900 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,458 psi | 78% | 3038 fps | 95.6% |
| IMR 4831 | <<locked>> | 94% | 36,027 psi | 57% | 2858 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 34,693 psi | 55% | 2799 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 39,972 psi | 63% | 2858 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 44,846 psi | 71% | 2949 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 36,332 psi | 58% | 2822 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 38,725 psi | 61% | 2782 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 33,591 psi | 53% | 2723 fps | 97.3% |
| Lovex S065 | <<locked>> | 94% | 42,525 psi | 67% | 2917 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 45,397 psi | 72% | 2995 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 52,866 psi | 84% | 3005 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,304 psi | 59% | 2799 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 37,391 psi | 59% | 2818 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 33,344 psi | 53% | 2753 fps | 95.8% |
| Norma URP | <<locked>> | 94% | 37,724 psi | 60% | 2907 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 32,735 psi | 52% | 2753 fps | 95.2% |
| Ramshot TAC | <<locked>> | 82% | 42,569 psi | 67% | 2907 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,870 psi | 62% | 2874 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,395 psi | 69% | 2907 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,744 psi | 41% | 1739 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,773 psi | 71% | 2949 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 45,266 psi | 72% | 2969 fps | 95.5% |
| ReloadSwiss RS 52 | 33.8 gr | 80% | 34,983 psi | 55% | 2864 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,051 psi | 46% | 2713 fps | 96.8% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,999 psi | 59% | 2917 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,930 psi | 65% | 2995 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 41,075 psi | 65% | 2858 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,375 psi | 56% | 2743 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 30,661 psi | 49% | 2690 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 98% | 50,285 psi | 80% | 3048 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 42,525 psi | 67% | 2917 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,332 psi | 58% | 2822 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 33,591 psi | 53% | 2723 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 98% | 45,397 psi | 72% | 2995 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,413 psi | 75% | 2963 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,447 psi | 85% | 2703 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,096 psi | 79% | 3054 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,155 psi | 51% | 2746 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,398 psi | 75% | 2956 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,898 psi | 60% | 2815 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,680 psi | 58% | 2808 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,856 psi | 62% | 2759 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,879 psi | 51% | 2615 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,921 psi | 76% | 2966 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 42,960 psi | 68% | 2943 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 38,464 psi | 61% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,565 psi | 60% | 2818 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 30,023 psi | 48% | 2651 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 27,905 psi | 44% | 2674 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 44,063 psi | 70% | 2838 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,957 psi | 62% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,185 psi | 54% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,085 psi | 56% | 2740 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 28,282 psi | 45% | 2582 fps | 96% |
| Vihtavuori N160 | <<locked>> | 92% | 37,231 psi | 59% | 2851 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 39,740 psi | 63% | 2848 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 33,881 psi | 54% | 2730 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 36,332 psi | 58% | 2854 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,212 psi | 49% | 2657 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 38,711 psi | 61% | 2894 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 46,253 psi | 73% | 3077 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,766 psi | 57% | 2808 fps | 97.3% |
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 104 powders for .25 x 47 Lapua loaded with the .257 | 100gr | Fox Classic Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,327 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,327 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.257" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .25 x 47 Lapua with the .257 | 100gr | Fox Classic Hunter 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.