Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Sellier & Bellot SP bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 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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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 55,999 psi | 88% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,246 psi | 90% | 2976 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,389 psi | 85% | 3041 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 90% | 54,143 psi | 85% | 2979 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 55,709 psi | 87% | 3045 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,966 psi | 78% | 2940 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,541 psi | 70% | 2900 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,346 psi | 85% | 2976 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,434 psi | 87% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,479 psi | 90% | 3028 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,796 psi | 87% | 3041 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,956 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,667 psi | 90% | 3104 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,348 psi | 90% | 3002 fps | 97.1% |
| Bofors RP15 | <<locked>> | 96% | 54,694 psi | 86% | 3022 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 3012 fps | 99.1% |
| Bofors RP5 | <<locked>> | 94% | 55,796 psi | 87% | 3041 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 55,767 psi | 87% | 2920 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3028 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 55,056 psi | 86% | 2976 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 57,638 psi | 90% | 2986 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 55,608 psi | 87% | 2979 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,563 psi | 86% | 2963 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,766 psi | 86% | 2900 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,114 psi | 86% | 3146 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,608 psi | 87% | 3015 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 58% | 1850 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,261 psi | 90% | 2959 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,217 psi | 90% | 2943 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 57,522 psi | 90% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,521 psi | 89% | 2959 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 96% | 57,188 psi | 90% | 3077 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,074 psi | 63% | 2799 fps | 96.3% |
| Lovex S065 | <<locked>> | 84% | 54,418 psi | 85% | 2887 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,985 psi | 88% | 2936 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,636 psi | 86% | 2963 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 40,234 psi | 63% | 2828 fps | 98.6% |
| Norma MRP | <<locked>> | 92% | 55,709 psi | 87% | 3061 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,434 psi | 87% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,056 psi | 85% | 3038 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 54,259 psi | 85% | 2963 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,507 psi | 89% | 3031 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 60% | 1896 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,072 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,477 psi | 87% | 3028 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 3028 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 82% | 57,246 psi | 90% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,448 psi | 87% | 2946 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 56,985 psi | 89% | 3015 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 55,767 psi | 87% | 2920 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,418 psi | 85% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,985 psi | 88% | 2936 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,869 psi | 89% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,101 psi | 89% | 2894 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,550 psi | 89% | 3012 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 56,652 psi | 89% | 2907 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,043 psi | 89% | 2943 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 55,898 psi | 88% | 2956 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,522 psi | 90% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 54,534 psi | 85% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,319 psi | 90% | 2946 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,087 psi | 89% | 2966 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 56,507 psi | 89% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,579 psi | 87% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,492 psi | 87% | 3058 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 55,245 psi | 87% | 3035 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 3035 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,695 psi | 89% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,274 psi | 87% | 2979 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,650 psi | 86% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,551 psi | 90% | 2982 fps | 99.8% |
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% | 34,882 psi | 55% | 2556 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 46,673 psi | 73% | 2808 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 44,106 psi | 69% | 2851 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 38,885 psi | 61% | 2684 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 39,624 psi | 62% | 2730 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 38,319 psi | 60% | 2694 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 88% | 30,240 psi | 47% | 2533 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,527 psi | 70% | 2815 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,561 psi | 81% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,899 psi | 61% | 2680 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,722 psi | 54% | 2618 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,460 psi | 52% | 2585 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,153 psi | 46% | 2493 fps | 96.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,666 psi | 57% | 2726 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,531 psi | 79% | 2881 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 34,621 psi | 54% | 2615 fps | 95.2% |
| Bofors RP30 | <<locked>> | 90% | 37,202 psi | 58% | 2710 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 34,722 psi | 54% | 2618 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 49,284 psi | 77% | 2812 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 36,608 psi | 57% | 2657 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 48,109 psi | 75% | 2858 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 50,734 psi | 80% | 2874 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 42,366 psi | 66% | 2740 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,568 psi | 65% | 2720 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,192 psi | 66% | 2697 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,606 psi | 54% | 2697 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 47,964 psi | 75% | 2887 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,833 psi | 44% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,643 psi | 70% | 2743 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,459 psi | 79% | 2835 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 44,280 psi | 69% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,350 psi | 65% | 2680 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 38,116 psi | 60% | 2707 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 37,608 psi | 59% | 2743 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 48,153 psi | 75% | 2785 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,499 psi | 73% | 2776 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 30,110 psi | 47% | 2431 fps | 96.3% |
| Norma 204 | <<locked>> | 80% | 44,643 psi | 70% | 2782 fps | 98% |
| Norma 217 | <<locked>> | 94% | 32,996 psi | 52% | 2644 fps | 96% |
| Norma MRP | 58.2 gr | 80% | 36,318 psi | 57% | 2687 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 45,730 psi | 72% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 37,753 psi | 59% | 2713 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,498 psi | 70% | 2792 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 33,663 psi | 53% | 2589 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 45% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,673 psi | 73% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,657 psi | 70% | 2848 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 31,430 psi | 49% | 2598 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,613 psi | 68% | 2887 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,635 psi | 84% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,205 psi | 63% | 2661 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 38,290 psi | 60% | 2664 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,284 psi | 77% | 2812 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,153 psi | 75% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,499 psi | 73% | 2776 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,534 psi | 84% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,021 psi | 74% | 2733 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,956 psi | 59% | 2661 fps | 96.6% |
| Somchem S355 | <<locked>> | 80% | 53,359 psi | 84% | 2861 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,828 psi | 64% | 2648 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 42,772 psi | 67% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,798 psi | 61% | 2648 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 51,097 psi | 80% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,108 psi | 74% | 2789 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,605 psi | 53% | 2516 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 46,456 psi | 73% | 2792 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,550 psi | 59% | 2661 fps | 99.8% |
| Vihtavuori N560 | 61.1 gr | 84% | 41,930 psi | 66% | 2802 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 39,247 psi | 62% | 2730 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 45,020 psi | 71% | 2900 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,108 psi | 72% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,370 psi | 76% | 2861 fps | 99.7% |
| Winchester StaBALL HD | 57.6 gr | 80% | 29,733 psi | 47% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,476 psi | 56% | 2569 fps | 95.6% |
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 74 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Sellier & Bellot SP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,146 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,146 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 1:13.0 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | Sellier & Bellot SP 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.