Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 154gr | RWS Evolution bullet and 76 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% | 54,998 psi | 86% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,376 psi | 88% | 2920 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,333 psi | 88% | 3045 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 94% | 57,406 psi | 90% | 3048 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 82% | 57,305 psi | 90% | 2874 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,058 psi | 89% | 2979 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,839 psi | 86% | 2986 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,110 psi | 77% | 2884 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,772 psi | 69% | 2844 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,232 psi | 90% | 2972 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,563 psi | 86% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,434 psi | 88% | 2966 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,853 psi | 86% | 2982 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,912 psi | 88% | 2949 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 3009 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,492 psi | 89% | 3045 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,449 psi | 88% | 2943 fps | 97% |
| Bofors RP15 | <<locked>> | 98% | 57,290 psi | 90% | 3018 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,169 psi | 80% | 2956 fps | 99% |
| Bofors RP5 | <<locked>> | 94% | 54,853 psi | 86% | 2982 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 55,114 psi | 86% | 2864 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 2972 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 54,288 psi | 85% | 2920 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,811 psi | 89% | 2930 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,694 psi | 86% | 2923 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,450 psi | 90% | 2966 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,450 psi | 90% | 2890 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,143 psi | 85% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,578 psi | 86% | 2956 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 58% | 1814 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,652 psi | 89% | 2904 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,623 psi | 89% | 2890 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,521 psi | 89% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,825 psi | 87% | 2904 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 96% | 56,333 psi | 88% | 3022 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 39,175 psi | 61% | 2743 fps | 96.2% |
| Lovex S065 | <<locked>> | 86% | 57,116 psi | 90% | 2884 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,230 psi | 87% | 2884 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 2904 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,070 psi | 85% | 2907 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,378 psi | 62% | 2772 fps | 98.5% |
| Norma MRP | <<locked>> | 92% | 54,491 psi | 85% | 3002 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,563 psi | 86% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,261 psi | 90% | 3045 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 57,261 psi | 90% | 2966 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,332 psi | 87% | 2972 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,029 psi | 60% | 1860 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,159 psi | 88% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,650 psi | 86% | 2976 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 3084 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,574 psi | 78% | 2966 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 56,521 psi | 89% | 2864 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,578 psi | 86% | 2890 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 55,898 psi | 88% | 2953 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 55,114 psi | 86% | 2864 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,116 psi | 90% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,230 psi | 87% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,289 psi | 88% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,405 psi | 88% | 2838 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,477 psi | 87% | 2953 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 56,144 psi | 88% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,072 psi | 88% | 2884 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 55,071 psi | 86% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,536 psi | 89% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 57,232 psi | 90% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,536 psi | 89% | 2894 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,999 psi | 88% | 2907 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 55,550 psi | 87% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,636 psi | 86% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,360 psi | 85% | 2999 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 98% | 54,302 psi | 85% | 2979 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,792 psi | 80% | 2972 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,956 psi | 88% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,520 psi | 85% | 2923 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,609 psi | 90% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,449 psi | 88% | 2923 fps | 99.7% |
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 3100 | <<locked>> | 80% | 34,258 psi | 54% | 2507 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 45,876 psi | 72% | 2756 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 37,130 psi | 58% | 2667 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 86% | 43,178 psi | 68% | 2792 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 53,664 psi | 84% | 2822 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,218 psi | 60% | 2631 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 38,986 psi | 61% | 2677 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 92% | 37,550 psi | 59% | 2638 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 90% | 31,676 psi | 50% | 2543 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,918 psi | 69% | 2759 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,865 psi | 80% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,276 psi | 60% | 2628 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,127 psi | 53% | 2569 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,982 psi | 52% | 2536 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,645 psi | 45% | 2441 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,969 psi | 56% | 2674 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,009 psi | 78% | 2831 fps | 95.4% |
| Bofors RP15 | <<locked>> | 82% | 34,069 psi | 53% | 2566 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 36,521 psi | 57% | 2661 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 34,127 psi | 53% | 2569 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 48,530 psi | 76% | 2756 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 35,984 psi | 56% | 2605 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 47,456 psi | 74% | 2805 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 50,038 psi | 78% | 2818 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 41,698 psi | 65% | 2684 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,886 psi | 64% | 2667 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,597 psi | 65% | 2644 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,055 psi | 53% | 2644 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 47,108 psi | 74% | 2831 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 44% | 1621 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,990 psi | 69% | 2690 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,951 psi | 78% | 2782 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,743 psi | 69% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,799 psi | 64% | 2628 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 37,652 psi | 59% | 2657 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 36,753 psi | 58% | 2684 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 47,630 psi | 75% | 2733 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,774 psi | 72% | 2723 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 29,573 psi | 46% | 2385 fps | 96.2% |
| Norma 204 | <<locked>> | 80% | 44,063 psi | 69% | 2730 fps | 98% |
| Norma 217 | <<locked>> | 94% | 32,242 psi | 51% | 2592 fps | 95.8% |
| Norma MRP | 56.3 gr | 80% | 35,737 psi | 56% | 2638 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 44,933 psi | 70% | 2740 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 37,144 psi | 58% | 2661 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 43,888 psi | 69% | 2740 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 33,185 psi | 52% | 2543 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 44% | 1660 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,803 psi | 72% | 2776 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,888 psi | 69% | 2792 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,893 psi | 48% | 2549 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,670 psi | 67% | 2831 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 52,808 psi | 83% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,726 psi | 62% | 2612 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 37,623 psi | 59% | 2612 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 48,530 psi | 76% | 2756 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,630 psi | 75% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,774 psi | 72% | 2723 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,852 psi | 83% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,398 psi | 73% | 2680 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,289 psi | 58% | 2608 fps | 96.5% |
| Somchem S355 | <<locked>> | 80% | 52,794 psi | 83% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,234 psi | 63% | 2598 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 41,989 psi | 66% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,218 psi | 60% | 2595 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 50,328 psi | 79% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,398 psi | 73% | 2736 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,040 psi | 52% | 2467 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 45,818 psi | 72% | 2740 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,999 psi | 58% | 2612 fps | 99.8% |
| Vihtavuori N560 | 59.1 gr | 84% | 41,292 psi | 65% | 2749 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 88% | 38,537 psi | 60% | 2677 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 96% | 44,164 psi | 69% | 2848 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,440 psi | 71% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,674 psi | 75% | 2808 fps | 99.6% |
| Winchester StaBALL HD | 55.7 gr | 80% | 29,254 psi | 46% | 2556 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,940 psi | 55% | 2523 fps | 95.5% |
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 | 154gr | RWS Evolution. Hodgdon Retumbo delivers the highest muzzle velocity at 3,087 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,087 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 58–90 %, leaving at least 10 % headroom. The 154.0 gr projectile in 0.277" calls for a 1:10.5 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 154gr | RWS Evolution they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 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.