Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Speer Deep Curl Soft Point bullet and 78 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% | 55,085 psi | 86% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,478 psi | 89% | 2963 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,608 psi | 89% | 3087 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 57,566 psi | 90% | 3091 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 82% | 57,363 psi | 90% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,203 psi | 90% | 3022 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 54,882 psi | 86% | 3028 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,240 psi | 77% | 2923 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,859 psi | 69% | 2884 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,319 psi | 90% | 3018 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,319 psi | 90% | 3018 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,348 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,636 psi | 86% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,608 psi | 89% | 3009 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,911 psi | 86% | 3022 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,260 psi | 88% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3054 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,695 psi | 89% | 3087 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,739 psi | 89% | 2986 fps | 96.9% |
| Bofors RP15 | <<locked>> | 98% | 57,537 psi | 90% | 3064 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,561 psi | 81% | 2999 fps | 99% |
| Bofors RP5 | <<locked>> | 94% | 54,911 psi | 86% | 3022 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 55,317 psi | 87% | 2910 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3012 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 54,360 psi | 85% | 2959 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 57,203 psi | 90% | 2976 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,781 psi | 86% | 2963 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,464 psi | 90% | 3005 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,479 psi | 90% | 2933 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,259 psi | 85% | 3130 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,694 psi | 86% | 2999 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,898 psi | 89% | 2949 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,536 psi | 89% | 2930 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,811 psi | 89% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,956 psi | 88% | 2946 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 96% | 56,608 psi | 89% | 3064 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 39,566 psi | 62% | 2785 fps | 96.1% |
| Lovex S065 | <<locked>> | 86% | 57,276 psi | 90% | 2930 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,564 psi | 87% | 2927 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,056 psi | 85% | 2949 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 39,508 psi | 62% | 2808 fps | 98.3% |
| Norma MRP | <<locked>> | 92% | 54,795 psi | 86% | 3045 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,969 psi | 86% | 2946 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,450 psi | 90% | 3087 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 57,435 psi | 90% | 3009 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,651 psi | 87% | 3015 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,956 psi | 59% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,391 psi | 88% | 2986 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,810 psi | 86% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3130 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,937 psi | 78% | 3009 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 56,478 psi | 89% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,853 psi | 86% | 2936 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 56,347 psi | 88% | 3002 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,317 psi | 87% | 2910 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,276 psi | 90% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,564 psi | 87% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,391 psi | 88% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,478 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,912 psi | 88% | 2999 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 56,144 psi | 88% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,304 psi | 88% | 2927 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 55,434 psi | 87% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,666 psi | 89% | 2969 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,450 psi | 90% | 2867 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,652 psi | 89% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,289 psi | 88% | 2949 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 55,840 psi | 88% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,882 psi | 86% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,650 psi | 86% | 3041 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 98% | 54,404 psi | 85% | 3018 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 3015 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,072 psi | 88% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,621 psi | 86% | 2966 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,911 psi | 84% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,681 psi | 89% | 2966 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% | 34,461 psi | 54% | 2543 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 46,180 psi | 72% | 2799 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 39,900 psi | 63% | 2769 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 86% | 43,308 psi | 68% | 2831 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 53,780 psi | 84% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,464 psi | 60% | 2671 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 39,276 psi | 62% | 2720 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 37,884 psi | 59% | 2680 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 90% | 31,807 psi | 50% | 2579 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,856 psi | 61% | 2674 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,856 psi | 61% | 2674 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,019 psi | 69% | 2802 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,039 psi | 80% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,493 psi | 60% | 2667 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,316 psi | 54% | 2605 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,054 psi | 52% | 2572 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,819 psi | 45% | 2480 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,071 psi | 57% | 2713 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,183 psi | 79% | 2871 fps | 95.3% |
| Bofors RP15 | <<locked>> | 84% | 36,492 psi | 57% | 2661 fps | 95.8% |
| Bofors RP30 | <<locked>> | 90% | 36,666 psi | 57% | 2697 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 34,316 psi | 54% | 2605 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 48,602 psi | 76% | 2795 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 36,143 psi | 57% | 2641 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 47,659 psi | 75% | 2848 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 50,270 psi | 79% | 2861 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 41,785 psi | 65% | 2723 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,191 psi | 65% | 2710 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,698 psi | 65% | 2684 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,127 psi | 53% | 2677 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 47,326 psi | 74% | 2874 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1650 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,208 psi | 69% | 2733 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,024 psi | 78% | 2825 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,787 psi | 69% | 2743 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,799 psi | 64% | 2664 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 40,393 psi | 63% | 2759 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 36,970 psi | 58% | 2723 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,718 psi | 75% | 2772 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 46,035 psi | 72% | 2766 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 29,704 psi | 47% | 2421 fps | 96.1% |
| Norma 204 | <<locked>> | 80% | 44,251 psi | 69% | 2772 fps | 97.9% |
| Norma 217 | <<locked>> | 94% | 32,343 psi | 51% | 2625 fps | 95.6% |
| Norma MRP | 57.6 gr | 80% | 35,897 psi | 56% | 2677 fps | 97.3% |
| Norma URP | <<locked>> | 80% | 45,237 psi | 71% | 2785 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 37,217 psi | 58% | 2697 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 44,048 psi | 69% | 2782 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 33,170 psi | 52% | 2575 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 1690 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,963 psi | 72% | 2818 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,237 psi | 69% | 2838 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,980 psi | 49% | 2582 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,946 psi | 67% | 2871 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 53,156 psi | 83% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,813 psi | 62% | 2651 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 37,666 psi | 59% | 2648 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,602 psi | 76% | 2795 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,718 psi | 75% | 2772 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 46,035 psi | 72% | 2766 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,040 psi | 83% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,644 psi | 73% | 2723 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,333 psi | 59% | 2644 fps | 96.3% |
| Somchem S355 | <<locked>> | 80% | 52,881 psi | 83% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,509 psi | 63% | 2638 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 42,235 psi | 66% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,406 psi | 60% | 2635 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,618 psi | 79% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,659 psi | 73% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,228 psi | 52% | 2507 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 46,021 psi | 72% | 2782 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,072 psi | 58% | 2648 fps | 99.7% |
| Vihtavuori N560 | 60.4 gr | 84% | 41,321 psi | 65% | 2789 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 88% | 38,711 psi | 61% | 2713 fps | 95% |
| Vihtavuori N568 | <<locked>> | 96% | 44,280 psi | 69% | 2884 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,730 psi | 72% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,892 psi | 75% | 2851 fps | 99.6% |
| Winchester StaBALL HD | 57 gr | 80% | 29,370 psi | 46% | 2592 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,925 psi | 55% | 2556 fps | 95.3% |
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 78 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Speer Deep Curl Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,130 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 1:12.0 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 | Speer Deep Curl Soft Point 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.