Load Specifications
Bullet Manufacturer:Speer
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:1:11.5
Load data in caliber .25 x 47 Lapua with .257 | 100gr | Speer Boat-Tail 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 Power Pro 2000-MR, ReloadSwiss RS 52 and ReloadSwiss RS 60.
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>> | 88% | 53,737 psi | 85% | 3041 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 57,087 psi | 90% | 3205 fps | 99.6% |
| Accurate 2460 | <<locked>> | 86% | 55,999 psi | 89% | 3123 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,969 psi | 87% | 3110 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,795 psi | 85% | 3133 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,593 psi | 88% | 3094 fps | 96.1% |
| Accurate 4064 | <<locked>> | 96% | 54,578 psi | 87% | 3156 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,601 psi | 74% | 3107 fps | 98.3% |
| Accurate LT-30 | <<locked>> | 84% | 56,971 psi | 90% | 3035 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,012 psi | 86% | 3015 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,391 psi | 89% | 3202 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 53,954 psi | 86% | 3140 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 82% | 53,911 psi | 85% | 3114 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,767 psi | 88% | 3153 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 55,230 psi | 88% | 3120 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,722 psi | 85% | 3215 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,130 psi | 89% | 3327 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 56,507 psi | 90% | 3212 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 53,722 psi | 85% | 3054 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 53,925 psi | 85% | 3182 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,325 psi | 73% | 3117 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,635 psi | 85% | 3281 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,101 psi | 89% | 3028 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,246 psi | 89% | 3215 fps | 99.5% |
| Bofors RP3 | <<locked>> | 96% | 53,592 psi | 85% | 3176 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,273 psi | 86% | 3127 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,491 psi | 86% | 3084 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,563 psi | 86% | 3182 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,289 psi | 89% | 3287 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 86% | 56,536 psi | 90% | 3153 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,664 psi | 85% | 3120 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,071 psi | 87% | 3186 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,314 psi | 80% | 3166 fps | 96.4% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 55,332 psi | 88% | 3189 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 92% | 56,869 psi | 90% | 3212 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,351 psi | 67% | 2986 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,825 psi | 88% | 3245 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 51,735 psi | 82% | 3196 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,693 psi | 55% | 1909 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,998 psi | 87% | 3163 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 56,072 psi | 89% | 3192 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 56,855 psi | 90% | 3173 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,302 psi | 86% | 3097 fps | 96.8% |
| IMR 4198 | <<locked>> | 84% | 54,172 psi | 86% | 3012 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,536 psi | 90% | 3169 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,411 psi | 70% | 3045 fps | 97.9% |
| IMR 4895 | <<locked>> | 94% | 55,245 psi | 88% | 3219 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 55,767 psi | 88% | 3153 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 55,941 psi | 89% | 3136 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,361 psi | 88% | 3169 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 56,246 psi | 89% | 3117 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 56,347 psi | 89% | 3169 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,924 psi | 82% | 3104 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,429 psi | 78% | 3081 fps | 96.3% |
| Norma 200 | <<locked>> | 82% | 57,000 psi | 90% | 3071 fps | 100% |
| Norma 201 | <<locked>> | 92% | 55,216 psi | 88% | 3143 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,564 psi | 88% | 3146 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,376 psi | 89% | 3222 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 46,760 psi | 74% | 3107 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 94% | 53,650 psi | 85% | 3196 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,151 psi | 73% | 3091 fps | 96.3% |
| Ramshot TAC | <<locked>> | 90% | 56,434 psi | 89% | 3169 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,332 psi | 88% | 3186 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,476 psi | 85% | 3097 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,085 psi | 56% | 1955 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,332 psi | 88% | 3133 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,564 psi | 88% | 3159 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 53,664 psi | 85% | 3251 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,824 psi | 85% | 3294 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,528 psi | 74% | 3130 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 3153 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 90% | 56,043 psi | 89% | 3123 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,303 psi | 88% | 3133 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 57,043 psi | 90% | 3219 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,273 psi | 86% | 3127 fps | 96.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,924 psi | 82% | 3104 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,361 psi | 88% | 3169 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,347 psi | 89% | 3169 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,429 psi | 78% | 3081 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,100 psi | 87% | 3097 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,797 psi | 90% | 2753 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,621 psi | 87% | 3130 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,158 psi | 87% | 3228 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 54,708 psi | 87% | 3077 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,404 psi | 86% | 3136 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,621 psi | 87% | 3166 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 53,708 psi | 85% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,956 psi | 90% | 3068 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,460 psi | 83% | 3048 fps | 96.5% |
| Somchem S321 | <<locked>> | 88% | 57,087 psi | 90% | 3192 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,376 psi | 89% | 3074 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,751 psi | 85% | 3130 fps | 99.7% |
| Somchem S355 | <<locked>> | 98% | 53,838 psi | 85% | 3163 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,553 psi | 66% | 3051 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 88% | 56,739 psi | 90% | 3038 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 57,000 psi | 90% | 3058 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,433 psi | 86% | 3097 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,999 psi | 89% | 3117 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,709 psi | 88% | 3143 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,124 psi | 78% | 3100 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 90% | 56,420 psi | 89% | 3153 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,331 psi | 86% | 3120 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,153 psi | 76% | 3107 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,592 psi | 55% | 2900 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,575 psi | 80% | 3087 fps | 99.8% |
| Winchester 748 | <<locked>> | 90% | 55,492 psi | 88% | 3202 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,314 psi | 80% | 3166 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,636 psi | 87% | 3179 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% | 42,134 psi | 67% | 2854 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 53,577 psi | 85% | 3150 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 45,832 psi | 73% | 2966 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,577 psi | 55% | 2762 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,828 psi | 65% | 2913 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 51,938 psi | 82% | 3035 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 32,677 psi | 52% | 2743 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 35,215 psi | 56% | 2867 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 50,459 psi | 80% | 2936 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,778 psi | 80% | 2963 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,537 psi | 61% | 2864 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 34,911 psi | 55% | 2756 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 50,589 psi | 80% | 3064 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,567 psi | 64% | 2881 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 39,523 psi | 63% | 2877 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,891 psi | 74% | 3094 fps | 99.4% |
| Alliant Power Pro 2000-MR | 35.4 gr | 80% | 34,853 psi | 55% | 2867 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,952 psi | 51% | 2723 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,355 psi | 75% | 2956 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,476 psi | 55% | 2785 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,390 psi | 58% | 2884 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,647 psi | 50% | 2789 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,298 psi | 78% | 2930 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,391 psi | 59% | 2854 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 31,285 psi | 50% | 2723 fps | 96.5% |
| Bofors RP7 | <<locked>> | 98% | 51,053 psi | 81% | 3074 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,612 psi | 68% | 2874 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,856 psi | 62% | 2897 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,482 psi | 67% | 3038 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 46,340 psi | 73% | 2992 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,094 psi | 75% | 3015 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 36,912 psi | 59% | 2835 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 98% | 46,963 psi | 74% | 3100 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 98% | 51,663 psi | 82% | 3127 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 38,812 psi | 62% | 2877 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,038 psi | 49% | 2710 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,809 psi | 55% | 2835 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 98% | 48,240 psi | 76% | 3130 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,744 psi | 41% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,405 psi | 59% | 2828 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 37,811 psi | 60% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,330 psi | 54% | 2733 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,790 psi | 76% | 2982 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 48,080 psi | 76% | 2920 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 46,905 psi | 74% | 2999 fps | 95.1% |
| IMR 4831 | <<locked>> | 92% | 34,214 psi | 54% | 2818 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 35,244 psi | 56% | 2822 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 40,567 psi | 64% | 2881 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 45,426 psi | 72% | 2966 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 36,912 psi | 59% | 2841 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 39,247 psi | 62% | 2802 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 34,142 psi | 54% | 2746 fps | 97.6% |
| Lovex S065 | <<locked>> | 92% | 40,727 psi | 65% | 2887 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 46,122 psi | 73% | 3018 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 53,606 psi | 85% | 3022 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,869 psi | 60% | 2818 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 37,971 psi | 60% | 2838 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 33,837 psi | 54% | 2776 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 36,143 psi | 57% | 2877 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 33,417 psi | 53% | 2782 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 98% | 43,149 psi | 68% | 3028 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 40,538 psi | 64% | 2871 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,653 psi | 63% | 2897 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,845 psi | 69% | 2923 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,904 psi | 41% | 1749 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,687 psi | 72% | 2976 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 42,989 psi | 68% | 2933 fps | 95% |
| ReloadSwiss RS 52 | 34.3 gr | 80% | 35,563 psi | 56% | 2887 fps | 96.1% |
| ReloadSwiss RS 60 | 34.8 gr | 80% | 29,443 psi | 47% | 2733 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 37,956 psi | 60% | 2949 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,452 psi | 66% | 3018 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 41,423 psi | 66% | 2871 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,940 psi | 57% | 2766 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 29,240 psi | 46% | 2654 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 98% | 51,053 psi | 81% | 3074 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 40,727 psi | 65% | 2887 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,912 psi | 59% | 2841 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 34,142 psi | 54% | 2746 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 98% | 46,122 psi | 73% | 3018 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,298 psi | 77% | 2989 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,867 psi | 85% | 2713 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,068 psi | 81% | 3074 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,590 psi | 52% | 2766 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,167 psi | 76% | 2976 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,435 psi | 61% | 2835 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,159 psi | 59% | 2828 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,450 psi | 63% | 2779 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,387 psi | 51% | 2635 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 45,643 psi | 72% | 2936 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 43,468 psi | 69% | 2963 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 39,015 psi | 62% | 2785 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,101 psi | 60% | 2838 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 30,530 psi | 48% | 2674 fps | 95.5% |
| Somchem S365 | <<locked>> | 88% | 28,268 psi | 45% | 2697 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 44,686 psi | 71% | 2858 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,537 psi | 63% | 2779 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,838 psi | 55% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,650 psi | 57% | 2759 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 28,761 psi | 46% | 2602 fps | 96.4% |
| Vihtavuori N160 | <<locked>> | 90% | 35,650 psi | 57% | 2822 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 40,582 psi | 64% | 2874 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 34,360 psi | 54% | 2749 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 37,028 psi | 59% | 2877 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 98% | 32,532 psi | 52% | 2844 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,720 psi | 50% | 2680 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 39,581 psi | 63% | 2920 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 47,326 psi | 75% | 3110 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,230 psi | 57% | 2828 fps | 97.5% |
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 115 powders for .25 x 47 Lapua loaded with the .257 | 100gr | Speer Boat-Tail. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,327 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,327 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 46–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.257" calls for a 1:11.5 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 Power Pro 2000-MR, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for .25 x 47 Lapua with the .257 | 100gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, IMR 4350 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.