Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Geco SOFTPOINT bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 56,405 psi | 88% | 2953 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,056 psi | 85% | 2930 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,056 psi | 86% | 3054 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 90% | 54,853 psi | 86% | 2992 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 56,405 psi | 88% | 3058 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 2953 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,266 psi | 71% | 2917 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,911 psi | 86% | 2986 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,970 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,360 psi | 85% | 2979 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,478 psi | 89% | 3051 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,740 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 3081 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,273 psi | 85% | 3054 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,273 psi | 85% | 2953 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 55,390 psi | 87% | 3035 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3028 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 56,478 psi | 89% | 3051 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 56,260 psi | 88% | 2930 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,883 psi | 88% | 3045 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 55,564 psi | 87% | 2986 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,578 psi | 86% | 2940 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 56,289 psi | 88% | 2992 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,969 psi | 86% | 2972 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,274 psi | 87% | 2907 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,043 psi | 88% | 3163 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,057 psi | 88% | 3025 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,086 psi | 58% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,505 psi | 85% | 2920 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,682 psi | 90% | 2953 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,404 psi | 85% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,159 psi | 90% | 2972 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 54,157 psi | 85% | 3031 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,625 psi | 64% | 2812 fps | 96.6% |
| Lovex S065 | <<locked>> | 84% | 54,911 psi | 86% | 2900 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,492 psi | 89% | 2946 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2969 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,376 psi | 87% | 2976 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 40,828 psi | 64% | 2841 fps | 98.7% |
| Norma MRP | <<locked>> | 92% | 56,449 psi | 88% | 3074 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,941 psi | 88% | 2966 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,766 psi | 86% | 3051 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 54,955 psi | 86% | 2976 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,464 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 60% | 1900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 53,998 psi | 85% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,289 psi | 88% | 3041 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3156 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 3041 fps | 98% |
| Rottweil R 904 | <<locked>> | 90% | 55,912 psi | 88% | 2959 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 57,479 psi | 90% | 3025 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 56,260 psi | 88% | 2930 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,911 psi | 86% | 2900 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,492 psi | 89% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,174 psi | 90% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,566 psi | 90% | 2904 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,029 psi | 89% | 3022 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 57,174 psi | 90% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,638 psi | 90% | 2953 fps | 98.9% |
| Somchem S365 | <<locked>> | 88% | 56,724 psi | 89% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,389 psi | 85% | 2940 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,071 psi | 86% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,244 psi | 85% | 2904 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,740 psi | 90% | 2976 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 56,971 psi | 89% | 2963 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,362 psi | 88% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,188 psi | 88% | 3074 fps | 99% |
| Vihtavuori N565 | <<locked>> | 98% | 55,883 psi | 88% | 3048 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 3048 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,334 psi | 90% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,811 psi | 87% | 2989 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,869 psi | 88% | 3104 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,215 psi | 85% | 2933 fps | 99.6% |
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 3100 | <<locked>> | 80% | 35,331 psi | 55% | 2566 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 47,239 psi | 74% | 2822 fps | 100% |
| Accurate MAGPRO | 62.9 gr | 84% | 41,524 psi | 65% | 2795 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 39,320 psi | 62% | 2697 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 40,045 psi | 63% | 2743 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 92% | 38,653 psi | 61% | 2707 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 30,690 psi | 48% | 2546 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,121 psi | 71% | 2825 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,127 psi | 82% | 2940 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,378 psi | 62% | 2690 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,186 psi | 55% | 2631 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,953 psi | 53% | 2595 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,515 psi | 46% | 2507 fps | 96.8% |
| Alliant Reloder-26 | 60.6 gr | 80% | 37,173 psi | 58% | 2740 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,213 psi | 80% | 2897 fps | 95.8% |
| Bofors RP15 | <<locked>> | 82% | 35,070 psi | 55% | 2628 fps | 95.4% |
| Bofors RP30 | <<locked>> | 90% | 37,623 psi | 59% | 2723 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 35,186 psi | 55% | 2631 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 49,559 psi | 78% | 2818 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 36,956 psi | 58% | 2667 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 48,631 psi | 76% | 2867 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 51,256 psi | 80% | 2887 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 40,030 psi | 63% | 2690 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,003 psi | 66% | 2730 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,525 psi | 67% | 2703 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 32,779 psi | 51% | 2641 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 48,443 psi | 76% | 2897 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 44% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,136 psi | 71% | 2756 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,952 psi | 80% | 2844 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 44,773 psi | 70% | 2762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,189 psi | 61% | 2635 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 38,711 psi | 61% | 2723 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,159 psi | 60% | 2756 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 48,660 psi | 76% | 2795 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,963 psi | 74% | 2789 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 30,414 psi | 48% | 2441 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 45,107 psi | 71% | 2795 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 31,212 psi | 49% | 2595 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 36,767 psi | 58% | 2700 fps | 97.6% |
| Norma URP | <<locked>> | 80% | 46,253 psi | 72% | 2805 fps | 100% |
| Ramshot Grand | 61.3 gr | 84% | 38,363 psi | 60% | 2730 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 44,976 psi | 70% | 2802 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 31,807 psi | 50% | 2539 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,572 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,181 psi | 74% | 2841 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,382 psi | 71% | 2864 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 31,894 psi | 50% | 2615 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 41,249 psi | 65% | 2838 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 40,683 psi | 64% | 2674 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 38,580 psi | 60% | 2674 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 49,559 psi | 78% | 2818 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,660 psi | 76% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,963 psi | 74% | 2789 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,867 psi | 84% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,471 psi | 74% | 2743 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,261 psi | 60% | 2671 fps | 96.8% |
| Somchem S355 | <<locked>> | 80% | 53,954 psi | 85% | 2871 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 41,408 psi | 65% | 2664 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 43,323 psi | 68% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,262 psi | 62% | 2661 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 51,619 psi | 81% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,659 psi | 75% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,040 psi | 53% | 2530 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 46,949 psi | 74% | 2802 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,087 psi | 60% | 2674 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 39,653 psi | 62% | 2753 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 39,900 psi | 63% | 2746 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 42,627 psi | 67% | 2851 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,775 psi | 73% | 2756 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,878 psi | 77% | 2874 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,110 psi | 47% | 2618 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,897 psi | 56% | 2582 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 73 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Geco SOFTPOINT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,163 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 150.0 gr projectile in 0.277" calls for a 1:14.0 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. Accurate MAGPRO, Ramshot Grand, Alliant Reloder-26 rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | Geco SOFTPOINT 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.