Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:120 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Caliber:.270 Weath. Mag. load data
Case Length (l3):2.549"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:82 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:9.5
Load data in caliber .270 Weath. Mag. with .277 | 120gr | Barnes BND SPIT-FIRE bullet and 102 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-26 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.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,752 psi | 86% | 3091 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,014 psi | 88% | 3159 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,041 psi | 85% | 3199 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 55,114 psi | 86% | 3150 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,970 psi | 88% | 3261 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,100 psi | 86% | 3353 fps | 97.1% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,217 psi | 88% | 3350 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 82% | 57,522 psi | 90% | 3235 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,245 psi | 87% | 3186 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,130 psi | 90% | 3307 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3291 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,476 psi | 85% | 3317 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,014 psi | 89% | 3297 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,014 psi | 89% | 3297 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,912 psi | 88% | 3209 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,115 psi | 88% | 3232 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,608 psi | 89% | 3323 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,215 psi | 85% | 3291 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,231 psi | 88% | 3291 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3291 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 3219 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,034 psi | 69% | 3130 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,462 psi | 85% | 3373 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,725 psi | 90% | 3255 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,008 psi | 77% | 3202 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 56,956 psi | 89% | 3225 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3291 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 56,188 psi | 88% | 3205 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 57,276 psi | 90% | 3245 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,418 psi | 85% | 3255 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 54,114 psi | 85% | 3209 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 98% | 54,955 psi | 86% | 3235 fps | 95.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3274 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,058 psi | 89% | 3238 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,766 psi | 86% | 3225 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,665 psi | 86% | 3291 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 57% | 2031 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,593 psi | 87% | 3189 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,708 psi | 86% | 3166 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,363 psi | 90% | 3205 fps | 99.2% |
| IMR 4350 | <<locked>> | 94% | 57,290 psi | 90% | 3241 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,447 psi | 85% | 3179 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 56,304 psi | 88% | 3248 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,609 psi | 90% | 3264 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,536 psi | 89% | 3225 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,214 psi | 82% | 3261 fps | 96.1% |
| Lovex S060 | <<locked>> | 82% | 56,159 psi | 88% | 3150 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,882 psi | 86% | 3159 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,447 psi | 85% | 3176 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 55,796 psi | 87% | 3219 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,672 psi | 70% | 3031 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 56,159 psi | 88% | 3173 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,898 psi | 89% | 3169 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,405 psi | 87% | 3219 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,491 psi | 85% | 3235 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 57,130 psi | 90% | 3386 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 54,563 psi | 86% | 3245 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,391 psi | 88% | 3245 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,446 psi | 82% | 3274 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 57,145 psi | 90% | 3301 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,862 psi | 73% | 3133 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 58% | 2077 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,305 psi | 90% | 3225 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,363 psi | 90% | 3310 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,653 psi | 90% | 3343 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,043 psi | 88% | 3287 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,331 psi | 85% | 3314 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,221 psi | 68% | 3146 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 56,811 psi | 89% | 3173 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,116 psi | 90% | 3222 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,158 psi | 86% | 3209 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 98% | 55,448 psi | 87% | 3271 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 56,188 psi | 88% | 3205 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,447 psi | 85% | 3176 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 54,882 psi | 86% | 3159 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,796 psi | 87% | 3219 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,853 psi | 86% | 3228 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,028 psi | 88% | 3202 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,898 psi | 89% | 3097 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,404 psi | 85% | 3045 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,302 psi | 85% | 3120 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,955 psi | 86% | 3268 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 56,666 psi | 89% | 3091 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,782 psi | 89% | 3215 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,087 psi | 89% | 3199 fps | 96.3% |
| Somchem S365 | <<locked>> | 96% | 57,595 psi | 90% | 3301 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,144 psi | 88% | 3245 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 82% | 57,421 psi | 90% | 3074 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,971 psi | 89% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,464 psi | 90% | 3140 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,810 psi | 86% | 3136 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,768 psi | 89% | 3238 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 3156 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 55,608 psi | 87% | 3136 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,811 psi | 87% | 3241 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3307 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3369 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,652 psi | 89% | 3199 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,679 psi | 86% | 3258 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,876 psi | 72% | 3281 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,202 psi | 88% | 3209 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,550 psi | 89% | 3241 fps | 98.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 51,068 psi | 80% | 3038 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,095 psi | 77% | 3038 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 35,650 psi | 56% | 2828 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 48,385 psi | 76% | 3041 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,854 psi | 58% | 2884 fps | 97.6% |
| Accurate High Country | <<locked>> | 94% | 47,848 psi | 75% | 3212 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 98% | 52,286 psi | 82% | 3281 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 53,824 psi | 84% | 3176 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,672 psi | 72% | 3009 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 43,758 psi | 69% | 3048 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 51,053 psi | 80% | 3222 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,546 psi | 79% | 3245 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,801 psi | 69% | 3045 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,801 psi | 69% | 3045 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,151 psi | 72% | 3038 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,356 psi | 77% | 3114 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,955 psi | 56% | 2894 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,944 psi | 64% | 3035 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,323 psi | 68% | 3038 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,700 psi | 68% | 3094 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,181 psi | 44% | 2680 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,156 psi | 54% | 2871 fps | 95.4% |
| Alliant Reloder-26 | 60.7 gr | 84% | 32,343 psi | 51% | 2864 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,824 psi | 84% | 3189 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 43,091 psi | 68% | 3074 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 46,557 psi | 73% | 3051 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,700 psi | 68% | 3094 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,973 psi | 64% | 2904 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,978 psi | 74% | 3061 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 38,841 psi | 61% | 2933 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 44,715 psi | 70% | 3025 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 51,198 psi | 80% | 3166 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,577 psi | 84% | 3209 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,547 psi | 53% | 2779 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,213 psi | 80% | 3166 fps | 100% |
| Hodgdon Superformance | 61.2 gr | 82% | 40,872 psi | 64% | 3012 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 42% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,953 psi | 81% | 3130 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,022 psi | 75% | 3048 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,299 psi | 79% | 3077 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 41,727 psi | 65% | 2940 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,438 psi | 67% | 2940 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 35,549 psi | 56% | 2831 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 50,633 psi | 79% | 3146 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,895 psi | 83% | 3163 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 48,689 psi | 76% | 3189 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 52,837 psi | 83% | 3097 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,457 psi | 76% | 3051 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,842 psi | 62% | 2881 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 38,101 psi | 60% | 2858 fps | 95.4% |
| Lovex S071 | <<locked>> | 92% | 34,374 psi | 54% | 2792 fps | 95% |
| Norma 201 | <<locked>> | 80% | 52,562 psi | 82% | 3114 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,214 psi | 83% | 3114 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,733 psi | 76% | 3100 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,295 psi | 69% | 3038 fps | 95.1% |
| Norma MRP | <<locked>> | 90% | 40,234 psi | 63% | 3045 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,637 psi | 57% | 2877 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 49,052 psi | 77% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,762 psi | 76% | 3199 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,694 psi | 56% | 2858 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 96% | 40,538 psi | 64% | 2992 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,601 psi | 43% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,065 psi | 74% | 3041 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,534 psi | 84% | 3248 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,511 psi | 68% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,680 psi | 57% | 2897 fps | 97.3% |
| ReloadSwiss RS 70 | 57.3 gr | 80% | 35,650 psi | 56% | 2900 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,132 psi | 63% | 3068 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,198 psi | 79% | 3064 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,758 psi | 69% | 2992 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,385 psi | 76% | 3084 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 42,453 psi | 67% | 3018 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,973 psi | 64% | 2904 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,842 psi | 62% | 2881 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 48,457 psi | 76% | 3051 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,101 psi | 60% | 2858 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,034 psi | 71% | 3048 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,446 psi | 82% | 3143 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,403 psi | 84% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,136 psi | 71% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,073 psi | 61% | 2818 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,933 psi | 70% | 3077 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 53,069 psi | 83% | 3038 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,048 psi | 69% | 2989 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 53,476 psi | 84% | 3140 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,112 psi | 52% | 2828 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 40,277 psi | 63% | 2936 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 53,940 psi | 85% | 3025 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,357 psi | 79% | 3025 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,531 psi | 79% | 3038 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,090 psi | 66% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,072 psi | 60% | 2877 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 42,409 psi | 66% | 2969 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 48,994 psi | 77% | 3031 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,666 psi | 59% | 2881 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 28,964 psi | 45% | 2700 fps | 95.2% |
| Vihtavuori N560 | <<locked>> | 96% | 50,009 psi | 78% | 3235 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,347 psi | 59% | 2844 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,015 psi | 61% | 2936 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,672 psi | 42% | 2710 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,359 psi | 82% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,803 psi | 72% | 3045 fps | 95.8% |
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 102 powders for .270 Weath. Mag. loaded with the .277 | 120gr | Barnes BND SPIT-FIRE. Norma MRP delivers the highest muzzle velocity at 3,386 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,386 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-26, Hodgdon Superformance rank at the top here: for .270 Weath. Mag. with the .277 | 120gr | Barnes BND SPIT-FIRE 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.