Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 140gr | Swift A-Frame bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 84% | 56,652 psi | 89% | 2969 fps | 99.6% |
| Accurate 3100 | <<locked>> | 96% | 55,216 psi | 87% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,797 psi | 89% | 3061 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,563 psi | 86% | 3123 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 54,795 psi | 86% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,624 psi | 90% | 3120 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 55,187 psi | 86% | 3120 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,195 psi | 72% | 2940 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,002 psi | 64% | 2897 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,956 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,609 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,056 psi | 86% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,188 psi | 90% | 3110 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,940 psi | 86% | 3114 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,970 psi | 88% | 3087 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,764 psi | 81% | 3091 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,565 psi | 89% | 3182 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 57,580 psi | 90% | 3077 fps | 96.2% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 3156 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 56,913 psi | 89% | 3012 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,805 psi | 75% | 3018 fps | 97.7% |
| Bofors RP5 | <<locked>> | 96% | 54,940 psi | 86% | 3114 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 56,057 psi | 88% | 3009 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,879 psi | 80% | 3035 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 82% | 56,971 psi | 89% | 3031 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,940 psi | 86% | 3061 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,186 psi | 85% | 3015 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 55,448 psi | 87% | 3058 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,360 psi | 85% | 3041 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,346 psi | 85% | 2986 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,560 psi | 79% | 3150 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 55,347 psi | 87% | 3100 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 58% | 1900 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,725 psi | 90% | 3005 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,479 psi | 90% | 3048 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,595 psi | 90% | 3035 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 57,159 psi | 90% | 3054 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,550 psi | 89% | 3041 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 98% | 56,797 psi | 89% | 3156 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 54,592 psi | 86% | 2979 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,086 psi | 88% | 3028 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 2982 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,708 psi | 86% | 3048 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 36,535 psi | 57% | 2815 fps | 96.5% |
| Norma MRP | <<locked>> | 94% | 54,955 psi | 86% | 3143 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 55,347 psi | 87% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,464 psi | 90% | 3176 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 57,740 psi | 90% | 3107 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3110 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,681 psi | 59% | 1949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,811 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,592 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,768 psi | 89% | 3087 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,158 psi | 86% | 3117 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3150 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 57,319 psi | 90% | 3012 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,347 psi | 87% | 3028 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 56,608 psi | 89% | 3097 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 56,057 psi | 88% | 3009 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,592 psi | 86% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,086 psi | 88% | 3028 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,187 psi | 86% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,377 psi | 90% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,508 psi | 90% | 2982 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,159 psi | 88% | 3091 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 56,768 psi | 89% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,043 psi | 89% | 3022 fps | 98.1% |
| Somchem S365 | <<locked>> | 90% | 55,492 psi | 87% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,232 psi | 90% | 3068 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 54,694 psi | 86% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,087 psi | 89% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,579 psi | 89% | 3041 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 56,231 psi | 88% | 3041 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,839 psi | 86% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,897 psi | 86% | 3133 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3104 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,710 psi | 89% | 2992 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,201 psi | 87% | 3064 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3228 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,101 psi | 89% | 3061 fps | 99.4% |
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% | 49,617 psi | 78% | 2854 fps | 98.9% |
| Accurate 3100 | <<locked>> | 80% | 32,068 psi | 50% | 2562 fps | 96.2% |
| Accurate 4350 | <<locked>> | 80% | 43,192 psi | 68% | 2831 fps | 99.8% |
| Accurate MAGPRO | 67.2 gr | 92% | 47,413 psi | 74% | 2989 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 51,387 psi | 81% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,696 psi | 61% | 2753 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 88% | 42,250 psi | 66% | 2864 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 98% | 43,323 psi | 68% | 2877 fps | 96% |
| ADI AR 2225 | <<locked>> | 94% | 33,866 psi | 53% | 2707 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,431 psi | 82% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,495 psi | 65% | 2841 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,732 psi | 75% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,638 psi | 61% | 2753 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 36,680 psi | 57% | 2746 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,777 psi | 48% | 2592 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,805 psi | 45% | 2546 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,518 psi | 53% | 2730 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,998 psi | 85% | 3015 fps | 95.3% |
| Bofors RP15 | <<locked>> | 88% | 38,972 psi | 61% | 2799 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 53,243 psi | 83% | 2956 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 38,986 psi | 61% | 2831 fps | 95.1% |
| Bofors RP5 | <<locked>> | 84% | 36,680 psi | 57% | 2746 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 46,325 psi | 73% | 2838 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 38,812 psi | 61% | 2779 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 53,345 psi | 84% | 2976 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,034 psi | 71% | 2884 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 47,543 psi | 75% | 2897 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 45,194 psi | 71% | 2874 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,324 psi | 69% | 2854 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,030 psi | 61% | 2720 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,390 psi | 57% | 2815 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 44,251 psi | 69% | 2904 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,572 psi | 43% | 1699 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,056 psi | 85% | 2949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,814 psi | 66% | 2762 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,732 psi | 75% | 2867 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 41,321 psi | 65% | 2779 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,903 psi | 69% | 2808 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 43,366 psi | 68% | 2904 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 45,194 psi | 71% | 2812 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,526 psi | 68% | 2799 fps | 98.6% |
| Lovex S071 | <<locked>> | 82% | 29,588 psi | 46% | 2490 fps | 95% |
| Norma 204 | <<locked>> | 80% | 41,626 psi | 65% | 2799 fps | 96.4% |
| Norma 217 | <<locked>> | 98% | 34,316 psi | 54% | 2753 fps | 95.5% |
| Norma MRP | 57.3 gr | 80% | 33,388 psi | 52% | 2687 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 42,482 psi | 67% | 2818 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 40,118 psi | 63% | 2841 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 41,336 psi | 65% | 2812 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 35,810 psi | 56% | 2717 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,253 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,287 psi | 84% | 2963 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,647 psi | 79% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,207 psi | 68% | 2854 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,408 psi | 65% | 2867 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,301 psi | 52% | 2723 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 50,154 psi | 79% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,873 psi | 67% | 2795 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 82% | 37,927 psi | 59% | 2733 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 46,325 psi | 73% | 2838 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,194 psi | 71% | 2812 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 43,526 psi | 68% | 2799 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,474 psi | 81% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,734 psi | 80% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,396 psi | 70% | 2759 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,608 psi | 59% | 2730 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,082 psi | 78% | 2900 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,830 psi | 69% | 2785 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,305 psi | 62% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,969 psi | 56% | 2657 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 47,921 psi | 75% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,918 psi | 69% | 2815 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,592 psi | 56% | 2641 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 43,337 psi | 68% | 2818 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 34,592 psi | 54% | 2677 fps | 99% |
| Vihtavuori N560 | 63.1 gr | 88% | 44,599 psi | 70% | 2940 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 92% | 41,350 psi | 65% | 2854 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,975 psi | 67% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,034 psi | 71% | 2884 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,325 psi | 43% | 2595 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,695 psi | 59% | 2697 fps | 95.4% |
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 80 powders for .270 Weath. Mag. loaded with the .277 | 140gr | Swift A-Frame. Winchester StaBALL HD delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,228 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 140.0 gr projectile in 0.277" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .270 Weath. Mag. with the .277 | 140gr | Swift A-Frame 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.