Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 130gr | Geco EXPRESS bullet and 86 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 Accurate High Country.
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% | 57,000 psi | 89% | 3087 fps | 99.4% |
| Accurate 3100 | <<locked>> | 98% | 56,478 psi | 89% | 3143 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,666 psi | 89% | 3064 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,549 psi | 85% | 3133 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,056 psi | 85% | 3238 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 96% | 55,100 psi | 86% | 3238 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 56,405 psi | 88% | 3104 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,303 psi | 87% | 3182 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 56,826 psi | 89% | 3245 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,247 psi | 62% | 2936 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,651 psi | 87% | 3182 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,651 psi | 87% | 3182 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,377 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,537 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,100 psi | 86% | 3192 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,507 psi | 89% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,926 psi | 86% | 3173 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,333 psi | 88% | 3238 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,029 psi | 89% | 3212 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 3150 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,693 psi | 84% | 3248 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 3219 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 54,853 psi | 86% | 3087 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,252 psi | 71% | 3064 fps | 96.4% |
| Bofors RP5 | <<locked>> | 98% | 56,333 psi | 88% | 3238 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 57,450 psi | 90% | 3133 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,762 psi | 76% | 3084 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,926 psi | 86% | 3107 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,463 psi | 88% | 3192 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 55,622 psi | 87% | 3143 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 56,811 psi | 89% | 3176 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,767 psi | 87% | 3159 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,666 psi | 87% | 3110 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,341 psi | 76% | 3199 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 88% | 56,840 psi | 89% | 3228 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 58% | 1975 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,695 psi | 87% | 3081 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,303 psi | 87% | 3117 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,695 psi | 87% | 3107 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 54,969 psi | 86% | 3127 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,549 psi | 85% | 3104 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 98% | 54,186 psi | 85% | 3212 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 55,985 psi | 88% | 3071 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,898 psi | 88% | 3100 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,537 psi | 90% | 3153 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,473 psi | 79% | 3045 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 56,884 psi | 89% | 3133 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,246 psi | 88% | 3173 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 56,217 psi | 88% | 3268 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 56,710 psi | 89% | 3176 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,853 psi | 86% | 3232 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 55,477 psi | 87% | 3176 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,069 psi | 83% | 3163 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 59% | 2024 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,824 psi | 86% | 3091 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,811 psi | 87% | 3202 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,418 psi | 85% | 3156 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,681 psi | 89% | 3248 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,631 psi | 76% | 3192 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 54,911 psi | 86% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,739 psi | 89% | 3150 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 54,259 psi | 85% | 3159 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 57,450 psi | 90% | 3133 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,898 psi | 88% | 3100 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,985 psi | 88% | 3071 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,537 psi | 90% | 3153 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,608 psi | 89% | 3146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,419 psi | 87% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,463 psi | 87% | 3051 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,290 psi | 90% | 3212 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 54,853 psi | 86% | 3081 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,853 psi | 86% | 3077 fps | 97.1% |
| Somchem S365 | <<locked>> | 92% | 56,565 psi | 89% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,882 psi | 86% | 3133 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 56,086 psi | 88% | 3048 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,027 psi | 86% | 3110 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,099 psi | 85% | 3100 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 56,739 psi | 89% | 3048 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,711 psi | 90% | 3169 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,738 psi | 87% | 3182 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,173 psi | 88% | 3258 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 3156 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,491 psi | 85% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,463 psi | 88% | 3192 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3294 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,882 psi | 86% | 3123 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% | 53,272 psi | 83% | 3025 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 32,779 psi | 51% | 2664 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 53,330 psi | 84% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,350 psi | 65% | 2890 fps | 99.3% |
| Accurate High Country | 64 gr | 88% | 43,671 psi | 68% | 3031 fps | 95.4% |
| Accurate MAGPRO | 68.2 gr | 92% | 47,674 psi | 75% | 3097 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,835 psi | 78% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,769 psi | 62% | 2871 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 46,427 psi | 73% | 3048 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 34,519 psi | 54% | 2802 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,016 psi | 63% | 2871 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,016 psi | 63% | 2871 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,676 psi | 79% | 3018 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,012 psi | 85% | 3094 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,682 psi | 62% | 2897 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,585 psi | 71% | 3031 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,610 psi | 62% | 2864 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,016 psi | 63% | 2917 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,443 psi | 46% | 2638 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,415 psi | 49% | 2710 fps | 95.6% |
| Alliant Reloder-26 | 60 gr | 80% | 31,778 psi | 50% | 2766 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 39,682 psi | 62% | 2907 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 51,314 psi | 80% | 3031 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,235 psi | 66% | 2995 fps | 95.4% |
| Bofors RP5 | <<locked>> | 88% | 40,016 psi | 63% | 2917 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,831 psi | 70% | 2904 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 42,583 psi | 67% | 2953 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,488 psi | 81% | 3048 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,033 psi | 67% | 2936 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,890 psi | 72% | 2959 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 46,427 psi | 73% | 2989 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,704 psi | 76% | 3035 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,463 psi | 59% | 2782 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,653 psi | 62% | 2989 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 42,322 psi | 66% | 2956 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 43% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,417 psi | 82% | 3028 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,321 psi | 63% | 2825 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,064 psi | 72% | 2930 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 39,465 psi | 62% | 2835 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,037 psi | 75% | 2982 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 44,266 psi | 69% | 3015 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 52,750 psi | 83% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,714 psi | 69% | 2881 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 42,003 psi | 66% | 2861 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 31,981 psi | 50% | 2644 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 53,345 psi | 84% | 3077 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,943 psi | 63% | 2851 fps | 95% |
| Norma MRP | <<locked>> | 84% | 36,593 psi | 57% | 2864 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,857 psi | 64% | 2884 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 44,208 psi | 69% | 3022 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,639 psi | 62% | 2867 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 90% | 36,579 psi | 57% | 2818 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,227 psi | 80% | 3028 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,385 psi | 76% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,278 psi | 65% | 2913 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,610 psi | 62% | 2920 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,521 psi | 57% | 2897 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 48,341 psi | 76% | 2976 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,874 psi | 69% | 2907 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 38,667 psi | 61% | 2841 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 44,831 psi | 70% | 2904 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,714 psi | 69% | 2881 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 52,750 psi | 83% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,003 psi | 66% | 2861 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,530 psi | 78% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,052 psi | 77% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,743 psi | 67% | 2818 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,031 psi | 64% | 2900 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,399 psi | 76% | 2972 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,124 psi | 75% | 2959 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 37,478 psi | 59% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,869 psi | 58% | 2769 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 46,282 psi | 73% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,221 psi | 66% | 2877 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 38,943 psi | 61% | 2808 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 53,287 psi | 84% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,655 psi | 65% | 2877 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 32,837 psi | 51% | 2720 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 90% | 45,571 psi | 71% | 3054 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 96% | 45,165 psi | 71% | 3028 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,234 psi | 65% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,265 psi | 68% | 2943 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,063 psi | 41% | 2618 fps | 97.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,481 psi | 65% | 2871 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 86 powders for .270 Weath. Mag. loaded with the .277 | 130gr | Geco EXPRESS. Winchester StaBALL HD delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,294 fps. ADI AR 2225 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.277" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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. Alliant Reloder-26, Accurate MAGPRO, Accurate High Country rank at the top here: for .270 Weath. Mag. with the .277 | 130gr | Geco EXPRESS 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.