Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 130gr | Swift A-Frame bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate MAGPRO and Norma MRP.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 57,290 psi | 90% | 3091 fps | 99.4% |
| Accurate 3100 | <<locked>> | 98% | 57,014 psi | 89% | 3153 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 57,000 psi | 89% | 3068 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,868 psi | 86% | 3140 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,347 psi | 87% | 3241 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 56,405 psi | 88% | 3104 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,550 psi | 87% | 3189 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 57,014 psi | 89% | 3248 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,595 psi | 62% | 2946 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,682 psi | 90% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,419 psi | 87% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,826 psi | 89% | 3219 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,158 psi | 86% | 3179 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,579 psi | 89% | 3245 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3219 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,705 psi | 78% | 3156 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,983 psi | 85% | 3255 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,434 psi | 87% | 3225 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 55,143 psi | 86% | 3094 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,701 psi | 72% | 3074 fps | 96.5% |
| Bofors RP5 | <<locked>> | 98% | 56,579 psi | 89% | 3245 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 57,740 psi | 90% | 3140 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,168 psi | 77% | 3094 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 55,245 psi | 87% | 3114 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,739 psi | 89% | 3196 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 55,912 psi | 88% | 3150 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 57,072 psi | 89% | 3186 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,970 psi | 88% | 3166 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,956 psi | 88% | 3117 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,776 psi | 76% | 3209 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 88% | 57,363 psi | 90% | 3235 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1975 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,999 psi | 88% | 3087 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,564 psi | 87% | 3120 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,724 psi | 87% | 3107 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 55,245 psi | 87% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,752 psi | 86% | 3110 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 98% | 54,737 psi | 86% | 3222 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 56,289 psi | 88% | 3077 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,130 psi | 88% | 3107 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,302 psi | 85% | 3100 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 3048 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,174 psi | 90% | 3140 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,492 psi | 89% | 3179 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 56,478 psi | 89% | 3271 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 57,000 psi | 89% | 3179 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,347 psi | 87% | 3241 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 55,724 psi | 87% | 3179 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,534 psi | 84% | 3173 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,521 psi | 59% | 2024 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,114 psi | 86% | 3097 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,159 psi | 88% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,679 psi | 86% | 3159 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,956 psi | 89% | 3255 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,066 psi | 77% | 3202 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 55,259 psi | 87% | 3091 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,985 psi | 89% | 3153 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 54,549 psi | 85% | 3163 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 57,740 psi | 90% | 3140 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,130 psi | 88% | 3107 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,289 psi | 88% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,302 psi | 85% | 3100 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,898 psi | 89% | 3153 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,738 psi | 87% | 2963 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,724 psi | 87% | 3054 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,085 psi | 85% | 3159 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 55,129 psi | 86% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,288 psi | 87% | 3087 fps | 97.2% |
| Somchem S365 | <<locked>> | 92% | 56,869 psi | 89% | 3176 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,100 psi | 86% | 3136 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 56,347 psi | 88% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,317 psi | 87% | 3114 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,578 psi | 86% | 3110 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 57,043 psi | 89% | 3051 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,447 psi | 85% | 3120 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,304 psi | 88% | 3192 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,449 psi | 88% | 3261 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,156 psi | 82% | 3166 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,969 psi | 86% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,739 psi | 89% | 3196 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,389 psi | 85% | 3304 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,100 psi | 86% | 3127 fps | 98.7% |
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 2700 | <<locked>> | 80% | 53,505 psi | 84% | 3031 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 33,040 psi | 52% | 2674 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 53,403 psi | 84% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,669 psi | 65% | 2900 fps | 99.4% |
| Accurate MAGPRO | 68.5 gr | 92% | 47,950 psi | 75% | 3107 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 49,893 psi | 78% | 2995 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,813 psi | 62% | 2874 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 46,630 psi | 73% | 3051 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 96% | 34,679 psi | 54% | 2808 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,749 psi | 80% | 3022 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,972 psi | 63% | 2907 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,890 psi | 72% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,827 psi | 62% | 2867 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,263 psi | 63% | 2923 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,544 psi | 46% | 2641 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,444 psi | 49% | 2713 fps | 95.6% |
| Alliant Reloder-26 | 60.3 gr | 80% | 32,010 psi | 50% | 2772 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 39,929 psi | 63% | 2913 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 51,634 psi | 81% | 3038 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,670 psi | 67% | 3009 fps | 95.6% |
| Bofors RP5 | <<locked>> | 88% | 40,263 psi | 63% | 2923 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 44,904 psi | 70% | 2904 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 42,743 psi | 67% | 2956 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 51,764 psi | 81% | 3054 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,323 psi | 68% | 2946 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 46,137 psi | 72% | 2969 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 46,659 psi | 73% | 2995 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,950 psi | 77% | 3041 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,565 psi | 59% | 2785 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,856 psi | 62% | 2995 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 42,583 psi | 67% | 2966 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,504 psi | 82% | 3031 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,553 psi | 64% | 2831 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,340 psi | 73% | 2936 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 39,740 psi | 62% | 2841 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,295 psi | 71% | 2930 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 44,672 psi | 70% | 3022 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 52,837 psi | 83% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,787 psi | 69% | 2881 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 42,250 psi | 66% | 2867 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 32,213 psi | 50% | 2648 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 53,664 psi | 84% | 3084 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,190 psi | 63% | 2858 fps | 95.2% |
| Norma MRP | 61.4 gr | 84% | 36,840 psi | 58% | 2871 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 41,104 psi | 64% | 2890 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 44,440 psi | 70% | 3028 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,900 psi | 63% | 2874 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 36,970 psi | 58% | 2828 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,094 psi | 44% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,517 psi | 81% | 3035 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,675 psi | 76% | 3091 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,336 psi | 65% | 2913 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,842 psi | 62% | 2923 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,869 psi | 58% | 2907 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,646 psi | 76% | 2982 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,135 psi | 69% | 2913 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 84% | 38,943 psi | 61% | 2848 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 44,904 psi | 70% | 2904 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,787 psi | 69% | 2881 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 52,837 psi | 83% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,250 psi | 66% | 2867 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,850 psi | 78% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,153 psi | 77% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,018 psi | 67% | 2825 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,595 psi | 60% | 2844 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 48,486 psi | 76% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,341 psi | 76% | 2966 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 37,768 psi | 59% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,086 psi | 58% | 2776 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 46,586 psi | 73% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,511 psi | 67% | 2884 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 39,175 psi | 61% | 2812 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 53,548 psi | 84% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,945 psi | 66% | 2884 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 33,083 psi | 52% | 2730 fps | 98% |
| Vihtavuori N560 | <<locked>> | 90% | 45,788 psi | 72% | 3058 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 45,426 psi | 71% | 3035 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,481 psi | 65% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,511 psi | 68% | 2949 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,252 psi | 41% | 2628 fps | 97.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,713 psi | 65% | 2877 fps | 95.9% |
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 88 powders for .270 Weath. Mag. loaded with the .277 | 130gr | Swift A-Frame. Winchester StaBALL HD delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,304 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.277" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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 Reloder-26, Accurate MAGPRO, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 130gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Norma 217 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.