Load Specifications
Load data in caliber .25-06 Rem. with .257 | 100gr | Winchester Silvertip bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Hodgdon H414.
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>> | 84% | 57,479 psi | 88% | 3071 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,929 psi | 90% | 3133 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,171 psi | 81% | 3107 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 57,769 psi | 89% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,071 psi | 84% | 3173 fps | 99.8% |
| Accurate High Countryᴾ | <<locked>> | 100% | 58,363 psi | 89% | 3320 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 82% | 56,666 psi | 87% | 3156 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,754 psi | 88% | 3156 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,173 psi | 86% | 3209 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,842 psi | 90% | 3153 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,609 psi | 88% | 3291 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,188 psi | 86% | 3205 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 58,740 psi | 90% | 3182 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,274 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,898 psi | 86% | 3238 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,392 psi | 88% | 3264 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,390 psi | 85% | 3196 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,779 psi | 81% | 3192 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,647 psi | 76% | 3127 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,497 psi | 67% | 3031 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,899 psi | 89% | 3340 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,942 psi | 87% | 3173 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 56,057 psi | 86% | 3146 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,779 psi | 81% | 3192 fps | 96.9% |
| Bofors RP7 | <<locked>> | 92% | 59,016 psi | 90% | 3179 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 56,391 psi | 86% | 3159 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 57,450 psi | 88% | 3228 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 56,985 psi | 87% | 3182 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 82% | 57,319 psi | 88% | 3166 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,101 psi | 86% | 3153 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,899 psi | 89% | 3202 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 58,102 psi | 89% | 3264 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 56% | 2005 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 58,450 psi | 90% | 3169 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,885 psi | 89% | 3146 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,188 psi | 88% | 3140 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,536 psi | 87% | 3120 fps | 98.6% |
| IMR 4350 | <<locked>> | 94% | 56,666 psi | 87% | 3156 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,348 psi | 88% | 3153 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 55,506 psi | 85% | 3163 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 56,739 psi | 87% | 3182 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 58,842 psi | 90% | 3153 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 57,159 psi | 88% | 3127 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,798 psi | 90% | 3127 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,377 psi | 88% | 3133 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,334 psi | 88% | 3150 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 58,798 psi | 90% | 3192 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,005 psi | 67% | 2940 fps | 97.2% |
| Norma 201 | <<locked>> | 84% | 58,943 psi | 90% | 3150 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,956 psi | 86% | 3094 fps | 100% |
| Norma 203B | <<locked>> | 86% | 58,363 psi | 89% | 3196 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,566 psi | 88% | 3209 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 56,405 psi | 86% | 3284 fps | 98.8% |
| Norma URP | <<locked>> | 94% | 57,522 psi | 88% | 3215 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 55,680 psi | 85% | 3163 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 56,318 psi | 86% | 3212 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,709 psi | 56% | 2047 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,623 psi | 87% | 3143 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,318 psi | 86% | 3222 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,768 psi | 87% | 3258 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 58,929 psi | 90% | 3255 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,740 psi | 88% | 3287 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,970 psi | 86% | 3097 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,231 psi | 86% | 3143 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,160 psi | 89% | 3182 fps | 96.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 58,668 psi | 90% | 3245 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 92% | 59,016 psi | 90% | 3179 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,334 psi | 88% | 3150 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,159 psi | 88% | 3127 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,377 psi | 88% | 3133 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 58,798 psi | 90% | 3192 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,015 psi | 89% | 3202 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 58,204 psi | 89% | 3159 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,856 psi | 90% | 3179 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,956 psi | 86% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,188 psi | 88% | 3028 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,130 psi | 88% | 3094 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,160 psi | 89% | 3238 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 55,956 psi | 86% | 3025 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,972 psi | 89% | 3143 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,985 psi | 86% | 3133 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,768 psi | 87% | 3219 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,608 psi | 85% | 3156 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 56,463 psi | 87% | 3009 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,188 psi | 86% | 3058 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,652 psi | 87% | 3071 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,522 psi | 88% | 3110 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,941 psi | 86% | 3153 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,242 psi | 79% | 3064 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 86% | 58,450 psi | 90% | 3114 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 58,827 psi | 90% | 3212 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,854 psi | 86% | 3219 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,854 psi | 86% | 3117 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,450 psi | 88% | 3228 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,252 psi | 69% | 3182 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 59,059 psi | 90% | 3186 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,854 psi | 86% | 3150 fps | 97.2% |
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% | 50,546 psi | 77% | 2972 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,240 psi | 74% | 2949 fps | 96.3% |
| Accurate 3100 | <<locked>> | 90% | 37,608 psi | 58% | 2802 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 47,848 psi | 73% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,056 psi | 55% | 2792 fps | 96.4% |
| Accurate High Country | <<locked>> | 96% | 50,517 psi | 77% | 3182 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 53,011 psi | 81% | 3097 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,107 psi | 69% | 2933 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 49,385 psi | 76% | 3087 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 55,056 psi | 84% | 3097 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,719 psi | 76% | 3156 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 49,458 psi | 76% | 3084 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,513 psi | 70% | 2959 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,559 psi | 74% | 3031 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,476 psi | 54% | 2808 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,176 psi | 62% | 2946 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,849 psi | 75% | 3074 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 46,079 psi | 71% | 3061 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 29,486 psi | 45% | 2648 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 38,145 psi | 58% | 2900 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 86% | 34,301 psi | 53% | 2841 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,011 psi | 81% | 3107 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 45,716 psi | 70% | 2969 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 46,079 psi | 71% | 3061 fps | 95.1% |
| Bofors RP7 | <<locked>> | 82% | 43,004 psi | 66% | 2881 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 46,151 psi | 71% | 2976 fps | 98.5% |
| Hodgdon H414 | 48.1 gr | 82% | 40,886 psi | 63% | 2907 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 47,065 psi | 72% | 2999 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 53,577 psi | 82% | 3107 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,982 psi | 51% | 2697 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,488 psi | 77% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 43,323 psi | 66% | 2986 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 41% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,358 psi | 79% | 3054 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 54,244 psi | 83% | 3091 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,427 psi | 73% | 2972 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,792 psi | 76% | 2999 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 43,830 psi | 67% | 2913 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,814 psi | 64% | 2858 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 34,940 psi | 54% | 2746 fps | 96.1% |
| IMR 4895 | <<locked>> | 80% | 49,806 psi | 76% | 3064 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 55,056 psi | 84% | 3097 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 53,359 psi | 82% | 3071 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,083 psi | 80% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,659 psi | 73% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,465 psi | 60% | 2805 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 40,161 psi | 62% | 2835 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 38,522 psi | 59% | 2822 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,112 psi | 80% | 3045 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,576 psi | 81% | 3041 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,906 psi | 73% | 3015 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 50,053 psi | 77% | 3074 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 42,380 psi | 65% | 3012 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 36,172 psi | 55% | 2795 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 48,283 psi | 74% | 3035 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 40,147 psi | 62% | 2897 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 42% | 1837 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,398 psi | 71% | 2956 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,475 psi | 80% | 3159 fps | 99.8% |
| ReloadSwiss RS 60 | 48 gr | 80% | 42,699 psi | 65% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,882 psi | 55% | 2805 fps | 96% |
| ReloadSwiss RS 70 | 48.7 gr | 80% | 35,070 psi | 54% | 2805 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 49,443 psi | 76% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,236 psi | 66% | 2913 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 54,288 psi | 83% | 3117 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 94% | 47,645 psi | 73% | 3051 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 43,004 psi | 66% | 2881 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,465 psi | 60% | 2805 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,359 psi | 82% | 3071 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,659 psi | 73% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,161 psi | 62% | 2835 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,164 psi | 68% | 2959 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 54,360 psi | 83% | 3097 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,561 psi | 79% | 3061 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,823 psi | 81% | 2979 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,599 psi | 68% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,191 psi | 63% | 2799 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,210 psi | 72% | 3045 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 52,649 psi | 81% | 2976 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,882 psi | 83% | 3081 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,569 psi | 67% | 2913 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 32,518 psi | 50% | 2740 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 45,469 psi | 70% | 2972 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 80% | 53,345 psi | 82% | 2963 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,661 psi | 76% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,995 psi | 77% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,655 psi | 64% | 2841 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,333 psi | 57% | 2792 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 96% | 44,744 psi | 69% | 2943 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 48,153 psi | 74% | 2956 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,927 psi | 57% | 2792 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 32,532 psi | 50% | 2733 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,782 psi | 56% | 2759 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 41,147 psi | 63% | 2913 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,978 psi | 43% | 2671 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,634 psi | 79% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 48,544 psi | 74% | 3022 fps | 95.5% |
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 97 powders for .25-06 Rem. loaded with the .257 | 100gr | Winchester Silvertip. Alliant Reloder-26 delivers the highest muzzle velocity at 3,340 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,340 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 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 High Country, Alliant Reloder-22 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 60, ReloadSwiss RS 70, Hodgdon H414 rank at the top here: for .25-06 Rem. with the .257 | 100gr | Winchester Silvertip 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.