Load Specifications
Bullet Manufacturer:Federal
Bullet Weight:115 gr
Bullet Diameter:0.264"
Bullet Length:<<locked>>
Caliber:6.5 Rem. SA Ultra Mag. load data
Case Length (l3):2.035"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:72 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:7.5
Load data in caliber 6.5 Rem. SA Ultra Mag. with .257 | 115gr | Federal Trophy Bonded bullet and 103 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 Alliant Reloder-26.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 58,479 psi | 90% | 2999 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,188 psi | 86% | 3018 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,969 psi | 83% | 3058 fps | 99.4% |
| Accurate 4064 | <<locked>> | 86% | 58,740 psi | 90% | 3058 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,188 psi | 86% | 3117 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,580 psi | 89% | 3087 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,129 psi | 85% | 3038 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,971 psi | 88% | 3156 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,708 psi | 84% | 3146 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,494 psi | 90% | 3228 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,029 psi | 88% | 3153 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,130 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,492 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,681 psi | 87% | 3176 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,436 psi | 90% | 3202 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,217 psi | 86% | 3143 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,577 psi | 82% | 3143 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,502 psi | 78% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,135 psi | 68% | 2989 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 58,566 psi | 90% | 3287 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,711 psi | 89% | 3107 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,240 psi | 76% | 3061 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 56,898 psi | 88% | 3077 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,577 psi | 82% | 3143 fps | 97.8% |
| Bofors RP7 | <<locked>> | 90% | 56,507 psi | 87% | 3064 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 86% | 57,522 psi | 88% | 3100 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 58,465 psi | 90% | 3173 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 90% | 57,986 psi | 89% | 3127 fps | 98.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,798 psi | 90% | 3153 fps | 96.6% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,435 psi | 88% | 3130 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 82% | 58,247 psi | 90% | 3097 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,174 psi | 88% | 3094 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 58,769 psi | 90% | 3136 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,897 psi | 84% | 3146 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,419 psi | 56% | 1926 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,550 psi | 85% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 58,088 psi | 89% | 3074 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,334 psi | 88% | 3054 fps | 99.2% |
| IMR 4350 | <<locked>> | 94% | 57,276 psi | 88% | 3094 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 58,044 psi | 89% | 3094 fps | 99.2% |
| IMR 4831 | <<locked>> | 94% | 56,550 psi | 87% | 3107 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,928 psi | 89% | 3120 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,391 psi | 87% | 3077 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,315 psi | 80% | 3117 fps | 96% |
| Lovex D073.6 | <<locked>> | 82% | 58,102 psi | 89% | 3058 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,217 psi | 86% | 3009 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 58,581 psi | 90% | 3071 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 58,044 psi | 89% | 3087 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 55,956 psi | 86% | 3074 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,918 psi | 69% | 2900 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 56,347 psi | 87% | 3028 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,927 psi | 88% | 3022 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,782 psi | 86% | 3074 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,450 psi | 90% | 3156 fps | 98.2% |
| Norma MRPᴾ | <<locked>> | 100% | 57,145 psi | 88% | 3238 fps | 99.3% |
| Norma URP | <<locked>> | 94% | 58,233 psi | 90% | 3153 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,420 psi | 87% | 3097 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,489 psi | 81% | 3130 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 57,203 psi | 88% | 3156 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,847 psi | 72% | 2995 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 57% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,348 psi | 88% | 3081 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,305 psi | 88% | 3159 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,957 psi | 89% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,941 psi | 86% | 3140 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 58,523 psi | 90% | 3232 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,192 psi | 66% | 3005 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 84% | 56,898 psi | 88% | 3028 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,072 psi | 88% | 3074 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,653 psi | 90% | 3127 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 98% | 55,564 psi | 85% | 3130 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 56,507 psi | 87% | 3064 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 58,044 psi | 89% | 3087 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 58,102 psi | 89% | 3058 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 58,581 psi | 90% | 3071 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,956 psi | 86% | 3074 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,784 psi | 90% | 3136 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,956 psi | 86% | 3054 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,942 psi | 88% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,001 psi | 89% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 58,044 psi | 89% | 3038 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,085 psi | 85% | 3123 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 56,840 psi | 87% | 2953 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 58,726 psi | 90% | 3077 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,130 psi | 88% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,101 psi | 88% | 3058 fps | 96.2% |
| Somchem S365 | <<locked>> | 96% | 57,827 psi | 89% | 3156 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,463 psi | 87% | 3107 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 82% | 57,435 psi | 88% | 2933 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,232 psi | 88% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,522 psi | 88% | 2999 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 58,595 psi | 90% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,971 psi | 88% | 3097 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,011 psi | 80% | 3015 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 55,782 psi | 86% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,898 psi | 86% | 3097 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,811 psi | 87% | 3163 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,392 psi | 88% | 3222 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,594 psi | 87% | 3058 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,465 psi | 90% | 3173 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,876 psi | 71% | 3133 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,376 psi | 87% | 3068 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,579 psi | 87% | 3097 fps | 98% |
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% | 51,300 psi | 79% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,008 psi | 75% | 2897 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 35,824 psi | 55% | 2700 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 48,559 psi | 75% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,956 psi | 57% | 2749 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 80% | 53,954 psi | 83% | 3031 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,948 psi | 71% | 2874 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 46,891 psi | 72% | 2972 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 98% | 51,343 psi | 79% | 3084 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,923 psi | 78% | 3104 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,976 psi | 68% | 2910 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,441 psi | 71% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,443 psi | 76% | 2969 fps | 99.9% |
| Alliant Reloder-16 | 45 gr | 80% | 36,085 psi | 56% | 2759 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,973 psi | 63% | 2897 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,468 psi | 67% | 2900 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,772 psi | 67% | 2953 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,311 psi | 44% | 2556 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,200 psi | 53% | 2740 fps | 95.3% |
| Alliant Reloder-26 | 52.2 gr | 84% | 32,518 psi | 50% | 2736 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,099 psi | 83% | 3048 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 45,977 psi | 71% | 2995 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 46,644 psi | 72% | 2910 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,772 psi | 67% | 2953 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 41,176 psi | 63% | 2772 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,992 psi | 72% | 2920 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 38,914 psi | 60% | 2799 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 44,759 psi | 69% | 2884 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 98% | 54,839 psi | 84% | 3087 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,882 psi | 83% | 3071 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 54,549 psi | 84% | 3041 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,591 psi | 52% | 2648 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,387 psi | 79% | 3022 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,756 psi | 63% | 2871 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 42% | 1722 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,257 psi | 80% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,327 psi | 74% | 2913 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,604 psi | 78% | 2940 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 41,887 psi | 64% | 2808 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,554 psi | 65% | 2805 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 35,563 psi | 55% | 2700 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 50,734 psi | 78% | 3002 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,098 psi | 82% | 3022 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 98% | 48,805 psi | 75% | 3048 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 54,317 psi | 84% | 3002 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,968 psi | 81% | 2956 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,573 psi | 75% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,016 psi | 62% | 2749 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 38,276 psi | 59% | 2726 fps | 95.4% |
| Lovex S071 | <<locked>> | 92% | 34,606 psi | 53% | 2671 fps | 95% |
| Norma 201 | <<locked>> | 80% | 52,736 psi | 81% | 2972 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,519 psi | 82% | 2972 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,820 psi | 75% | 2956 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,382 psi | 68% | 2900 fps | 95% |
| Norma MRP | <<locked>> | 90% | 40,306 psi | 62% | 2907 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 36,782 psi | 57% | 2746 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 49,400 psi | 76% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,834 psi | 75% | 3058 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 35,665 psi | 55% | 2726 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 43,598 psi | 67% | 2927 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 43% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,152 psi | 73% | 2904 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,505 psi | 82% | 3097 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,526 psi | 67% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,898 psi | 57% | 2769 fps | 97.3% |
| ReloadSwiss RS 70 | 49.3 gr | 80% | 35,911 psi | 55% | 2772 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,306 psi | 62% | 2933 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 50,415 psi | 78% | 2927 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,903 psi | 68% | 2854 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,443 psi | 75% | 2949 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 45,571 psi | 70% | 2946 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 41,176 psi | 63% | 2772 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,016 psi | 62% | 2749 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,317 psi | 84% | 3002 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,573 psi | 75% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,276 psi | 59% | 2726 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,991 psi | 69% | 2907 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,402 psi | 81% | 2999 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,490 psi | 82% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,223 psi | 70% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,175 psi | 60% | 2690 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,150 psi | 69% | 2940 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 53,272 psi | 82% | 2900 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,984 psi | 85% | 3022 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,222 psi | 68% | 2851 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 53,476 psi | 82% | 2999 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 33,359 psi | 51% | 2700 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 40,451 psi | 62% | 2805 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 54,041 psi | 83% | 2887 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,444 psi | 78% | 2887 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,662 psi | 78% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,235 psi | 65% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,174 psi | 59% | 2746 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 42,496 psi | 65% | 2838 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 48,950 psi | 75% | 2890 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,681 psi | 58% | 2746 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 29,022 psi | 45% | 2572 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 96% | 50,009 psi | 77% | 3091 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,550 psi | 58% | 2717 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,131 psi | 60% | 2802 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,629 psi | 41% | 2579 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,765 psi | 81% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,919 psi | 71% | 2913 fps | 95.7% |
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 103 powders for 6.5 Rem. SA Ultra Mag. loaded with the .257 | 115gr | Federal Trophy Bonded. Alliant Reloder-26 delivers the highest muzzle velocity at 3,287 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,287 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.264" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for 6.5 Rem. SA Ultra Mag. with the .257 | 115gr | Federal Trophy Bonded 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.