Load Specifications
Bullet:.257 | 100gr | Osprey Virtus
Bullet Manufacturer:Virtus
Bullet Weight:100 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:1:10.0
Load data in caliber .25-06 Rem. with .257 | 100gr | Osprey Virtus bullet and 105 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-16 and Hodgdon Superformance.
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 2015 | <<locked>> | 82% | 58,378 psi | 89% | 3058 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 58,117 psi | 89% | 3084 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,594 psi | 87% | 3097 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,024 psi | 77% | 3058 fps | 98.3% |
| Accurate 4064 | <<locked>> | 88% | 58,450 psi | 90% | 3140 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,825 psi | 86% | 3186 fps | 99.8% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,085 psi | 84% | 3264 fps | 96% |
| ADI AR 2206H | <<locked>> | 84% | 57,957 psi | 89% | 3176 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,709 psi | 85% | 3123 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,653 psi | 88% | 3232 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,652 psi | 87% | 3120 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 58,349 psi | 89% | 3091 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,984 psi | 84% | 3251 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,566 psi | 88% | 3225 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,420 psi | 86% | 3150 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,797 psi | 87% | 3173 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,087 psi | 87% | 3258 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 58,581 psi | 90% | 3284 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,710 psi | 87% | 3215 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,067 psi | 77% | 3140 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,152 psi | 72% | 3084 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,104 psi | 63% | 2976 fps | 97% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,491 psi | 83% | 3287 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 58,421 psi | 90% | 3192 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 57,145 psi | 88% | 3163 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,067 psi | 77% | 3140 fps | 96% |
| Bofors RP7 | <<locked>> | 92% | 56,898 psi | 87% | 3143 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,943 psi | 89% | 3100 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,739 psi | 87% | 3150 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,696 psi | 88% | 3179 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 58,653 psi | 90% | 3248 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 58,595 psi | 90% | 3209 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 84% | 58,595 psi | 90% | 3186 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,276 psi | 88% | 3169 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,274 psi | 85% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,317 psi | 85% | 3219 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 55% | 1995 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,362 psi | 86% | 3136 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,608 psi | 85% | 3117 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 58,697 psi | 90% | 3163 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 58,131 psi | 89% | 3143 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 57,957 psi | 89% | 3173 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 58,668 psi | 90% | 3173 fps | 98.7% |
| IMR 4831 | <<locked>> | 96% | 56,507 psi | 87% | 3179 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 58,276 psi | 89% | 3205 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 56,652 psi | 87% | 3120 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 58,610 psi | 90% | 3150 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,058 psi | 87% | 3100 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 58,624 psi | 90% | 3153 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 58,436 psi | 90% | 3166 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 56,246 psi | 86% | 3153 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,292 psi | 63% | 2887 fps | 96.3% |
| Norma 201 | <<locked>> | 84% | 56,449 psi | 86% | 3117 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,450 psi | 88% | 3117 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,057 psi | 86% | 3159 fps | 100% |
| Norma 204 | <<locked>> | 96% | 59,059 psi | 90% | 3228 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 53,214 psi | 82% | 3232 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 58,653 psi | 90% | 3235 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 57,043 psi | 87% | 3182 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 57,537 psi | 88% | 3232 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 57,043 psi | 87% | 3140 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,246 psi | 88% | 3163 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 56% | 2037 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 58,102 psi | 89% | 3166 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,885 psi | 89% | 3248 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 58,262 psi | 89% | 3284 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,246 psi | 86% | 3212 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,042 psi | 84% | 3241 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 56,898 psi | 87% | 3094 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,043 psi | 87% | 3114 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,000 psi | 87% | 3156 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,869 psi | 86% | 3199 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 56,898 psi | 87% | 3143 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 58,436 psi | 90% | 3166 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 58,610 psi | 90% | 3150 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 58,624 psi | 90% | 3153 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,246 psi | 86% | 3153 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,477 psi | 85% | 3166 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,854 psi | 86% | 3120 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,710 psi | 87% | 3146 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,667 psi | 88% | 3051 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 58,755 psi | 90% | 3048 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 58,392 psi | 89% | 3114 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,376 psi | 85% | 3192 fps | 97.2% |
| Somchem S335 | <<locked>> | 84% | 57,116 psi | 88% | 3041 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,492 psi | 85% | 3107 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,159 psi | 88% | 3156 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 57,798 psi | 89% | 3232 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,434 psi | 86% | 3169 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 84% | 58,146 psi | 89% | 3031 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,290 psi | 88% | 3074 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,986 psi | 89% | 3091 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 59,030 psi | 90% | 3130 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,043 psi | 87% | 3169 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,646 psi | 75% | 3018 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 82% | 57,174 psi | 88% | 3120 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 56,289 psi | 86% | 3084 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,304 psi | 86% | 3176 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,663 psi | 81% | 3169 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,261 psi | 88% | 3136 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 58,117 psi | 89% | 3173 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 59,030 psi | 90% | 3251 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,395 psi | 65% | 3117 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,869 psi | 87% | 3153 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,214 psi | 82% | 3104 fps | 96.5% |
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 2015 | <<locked>> | 80% | 54,665 psi | 84% | 3009 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,427 psi | 73% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,195 psi | 71% | 2910 fps | 95.6% |
| Accurate 3100 | <<locked>> | 92% | 37,536 psi | 58% | 2802 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 44,918 psi | 69% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,808 psi | 52% | 2736 fps | 95.4% |
| Accurate High Country | <<locked>> | 98% | 51,401 psi | 79% | 3199 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 51,010 psi | 78% | 3061 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 43,323 psi | 66% | 2897 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 96% | 50,444 psi | 77% | 3104 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,185 psi | 81% | 3064 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,476 psi | 83% | 3038 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,485 psi | 73% | 3114 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 50,444 psi | 77% | 3100 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,497 psi | 67% | 2923 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,485 psi | 71% | 2992 fps | 99.3% |
| Alliant Reloder-16 | 43.6 gr | 80% | 33,504 psi | 51% | 2753 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,029 psi | 58% | 2897 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,763 psi | 76% | 3091 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,818 psi | 72% | 3074 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 29,501 psi | 45% | 2651 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,551 psi | 59% | 2910 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,534 psi | 53% | 2851 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,894 psi | 78% | 3071 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 43,453 psi | 67% | 2927 fps | 99.7% |
| Bofors RP5 | <<locked>> | 98% | 46,818 psi | 72% | 3074 fps | 95.1% |
| Bofors RP7 | <<locked>> | 84% | 43,947 psi | 67% | 2900 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,433 psi | 83% | 3048 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,895 psi | 81% | 3091 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,121 psi | 68% | 2936 fps | 98% |
| Hodgdon H414 | <<locked>> | 84% | 41,713 psi | 64% | 2927 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 48,066 psi | 74% | 3018 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 51,576 psi | 79% | 3074 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,908 psi | 47% | 2644 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,211 psi | 74% | 3045 fps | 100% |
| Hodgdon Superformance | 53.4 gr | 86% | 44,193 psi | 68% | 3005 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 41% | 1785 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,559 psi | 76% | 3025 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 51,924 psi | 80% | 3061 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,513 psi | 70% | 2936 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,805 psi | 73% | 2959 fps | 96.9% |
| IMR 4350 | <<locked>> | 88% | 44,657 psi | 68% | 2933 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,801 psi | 66% | 2881 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 32,735 psi | 50% | 2690 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 47,732 psi | 73% | 3028 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 53,185 psi | 81% | 3064 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,082 psi | 78% | 3035 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,299 psi | 77% | 2989 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,542 psi | 70% | 2933 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 37,318 psi | 57% | 2756 fps | 95.2% |
| Lovex S070 | <<locked>> | 84% | 40,524 psi | 62% | 2848 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 38,493 psi | 59% | 2825 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 49,632 psi | 76% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,473 psi | 77% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,876 psi | 70% | 2979 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 51,343 psi | 79% | 3097 fps | 95.9% |
| Norma MRP | <<locked>> | 94% | 42,859 psi | 66% | 3022 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 33,997 psi | 52% | 2740 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,108 psi | 71% | 2995 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 38,101 psi | 58% | 2848 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 53,330 psi | 82% | 3081 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,432 psi | 82% | 3100 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 42% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,295 psi | 68% | 2917 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,241 psi | 77% | 3120 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,538 psi | 62% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,303 psi | 56% | 2822 fps | 96% |
| ReloadSwiss RS 70 | 48.9 gr | 82% | 35,665 psi | 55% | 2825 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 53,737 psi | 82% | 3045 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,282 psi | 72% | 2953 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,741 psi | 62% | 2864 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 96% | 48,428 psi | 74% | 3068 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 84% | 43,947 psi | 67% | 2900 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,318 psi | 57% | 2756 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,082 psi | 78% | 3035 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,542 psi | 70% | 2933 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 40,524 psi | 62% | 2848 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,250 psi | 65% | 2927 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,054 psi | 80% | 3058 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,705 psi | 76% | 3028 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,865 psi | 78% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,743 psi | 65% | 2799 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 41,785 psi | 64% | 2815 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,979 psi | 74% | 3058 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 50,386 psi | 77% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,750 psi | 79% | 3045 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 41,249 psi | 63% | 2867 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 30,560 psi | 47% | 2690 fps | 97.6% |
| Somchem S385 | <<locked>> | 92% | 43,062 psi | 66% | 2923 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 51,416 psi | 79% | 2936 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,398 psi | 73% | 2927 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,761 psi | 73% | 2933 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,421 psi | 60% | 2795 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 35,447 psi | 54% | 2746 fps | 95.9% |
| Vihtavuori N165 | <<locked>> | 98% | 45,469 psi | 70% | 2956 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 53,548 psi | 82% | 3064 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,267 psi | 71% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,012 psi | 54% | 2746 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 32,416 psi | 50% | 2736 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,983 psi | 54% | 2717 fps | 98.1% |
| Winchester 748 | <<locked>> | 80% | 54,172 psi | 83% | 3114 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 41,713 psi | 64% | 2927 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,834 psi | 46% | 2743 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,414 psi | 76% | 3031 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,313 psi | 76% | 3035 fps | 95.6% |
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 105 powders for .25-06 Rem. loaded with the .257 | 100gr | Osprey Virtus. Alliant Reloder-26 delivers the highest muzzle velocity at 3,287 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,287 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (450 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.257" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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-16, Hodgdon Superformance rank at the top here: for .25-06 Rem. with the .257 | 100gr | Osprey Virtus 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.