Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Nosler Ballistic Tip Hunting bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-25, Alliant Reloder-26 and Winchester StaBALL HD.
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>> | 96% | 57,435 psi | 90% | 2959 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,940 psi | 86% | 2936 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,811 psi | 87% | 3061 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 82% | 56,159 psi | 88% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,680 psi | 87% | 2995 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 96% | 57,305 psi | 90% | 3061 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,834 psi | 75% | 2890 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,583 psi | 67% | 2854 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,464 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,811 psi | 87% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,217 psi | 90% | 3012 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,390 psi | 87% | 2986 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,188 psi | 90% | 3058 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,665 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3028 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,752 psi | 86% | 3058 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,550 psi | 87% | 2959 fps | 96.5% |
| Bofors RP15 | <<locked>> | 98% | 56,043 psi | 88% | 3038 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,908 psi | 78% | 2969 fps | 98.7% |
| Bofors RP5 | <<locked>> | 96% | 57,188 psi | 90% | 3058 fps | 99.8% |
| Bofors RP7 | <<locked>> | 86% | 57,667 psi | 90% | 2940 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,736 psi | 83% | 2982 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 86% | 56,942 psi | 89% | 2995 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,869 psi | 88% | 2949 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 94% | 57,159 psi | 90% | 2995 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,043 psi | 88% | 2979 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,304 psi | 88% | 2913 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3097 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 57,232 psi | 90% | 3035 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1837 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,666 psi | 87% | 2927 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,492 psi | 87% | 2910 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 55,419 psi | 87% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,636 psi | 86% | 2920 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 96% | 55,100 psi | 86% | 3038 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 56,173 psi | 88% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,609 psi | 90% | 2953 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,449 psi | 88% | 2982 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 2779 fps | 97.9% |
| Norma MRP | <<locked>> | 94% | 57,072 psi | 89% | 3081 fps | 100% |
| Norma URP | <<locked>> | 88% | 56,985 psi | 89% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,622 psi | 87% | 3054 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 55,912 psi | 88% | 2982 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,940 psi | 85% | 2989 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,739 psi | 59% | 1877 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,826 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,013 psi | 86% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,319 psi | 90% | 3051 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,330 psi | 84% | 3097 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,211 psi | 76% | 2976 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 82% | 55,230 psi | 87% | 2884 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,072 psi | 89% | 2966 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 54,795 psi | 86% | 2972 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 57,667 psi | 90% | 2940 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,173 psi | 88% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,609 psi | 90% | 2953 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,942 psi | 89% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,187 psi | 86% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,477 psi | 87% | 2861 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,360 psi | 85% | 2969 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 54,940 psi | 86% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,085 psi | 86% | 2904 fps | 98.3% |
| Somchem S365 | <<locked>> | 90% | 57,493 psi | 90% | 2976 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,448 psi | 87% | 2946 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,260 psi | 88% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,245 psi | 87% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,882 psi | 86% | 2923 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 54,534 psi | 85% | 2920 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,927 psi | 89% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,927 psi | 89% | 3074 fps | 98.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3051 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,545 psi | 78% | 2986 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,940 psi | 86% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,942 psi | 89% | 2995 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,840 psi | 88% | 3107 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,303 psi | 87% | 2940 fps | 99.5% |
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% | 33,446 psi | 52% | 2516 fps | 97.4% |
| Accurate 4350 | <<locked>> | 80% | 44,904 psi | 70% | 2772 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 42,163 psi | 66% | 2805 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 52,837 psi | 83% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,478 psi | 59% | 2644 fps | 96% |
| ADI AR 2213 | <<locked>> | 86% | 40,930 psi | 64% | 2753 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 94% | 39,218 psi | 61% | 2707 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 90% | 30,995 psi | 49% | 2549 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,070 psi | 85% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,018 psi | 67% | 2779 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,530 psi | 78% | 2897 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,478 psi | 59% | 2641 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,592 psi | 56% | 2638 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,024 psi | 50% | 2546 fps | 99.6% |
| Alliant Reloder-25 | 53.6 gr | 80% | 28,021 psi | 44% | 2451 fps | 95.7% |
| Alliant Reloder-26 | 57.9 gr | 80% | 34,867 psi | 55% | 2680 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,286 psi | 82% | 2904 fps | 95.7% |
| Bofors RP15 | <<locked>> | 84% | 35,491 psi | 56% | 2635 fps | 95.3% |
| Bofors RP30 | <<locked>> | 92% | 37,971 psi | 60% | 2726 fps | 95.6% |
| Bofors RP5 | <<locked>> | 82% | 35,592 psi | 56% | 2638 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 47,718 psi | 75% | 2776 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 37,536 psi | 59% | 2671 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 46,528 psi | 73% | 2822 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 49,182 psi | 77% | 2838 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 40,857 psi | 64% | 2700 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,931 psi | 67% | 2743 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,509 psi | 63% | 2661 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,462 psi | 56% | 2713 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 46,050 psi | 72% | 2848 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 44% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,192 psi | 68% | 2707 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,182 psi | 77% | 2802 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 42,656 psi | 67% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,641 psi | 67% | 2700 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 86% | 39,291 psi | 62% | 2730 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,615 psi | 73% | 2749 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 44,962 psi | 70% | 2740 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 28,877 psi | 45% | 2395 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 43,207 psi | 68% | 2746 fps | 97.5% |
| Norma 217 | <<locked>> | 94% | 31,444 psi | 49% | 2595 fps | 95% |
| Norma MRP | <<locked>> | 80% | 34,722 psi | 54% | 2644 fps | 96.7% |
| Norma URP | <<locked>> | 80% | 44,048 psi | 69% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 38,972 psi | 61% | 2736 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 42,989 psi | 67% | 2759 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 32,227 psi | 51% | 2546 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,311 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,605 psi | 82% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,831 psi | 70% | 2795 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,960 psi | 67% | 2812 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,430 psi | 51% | 2628 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 41,582 psi | 65% | 2838 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 51,837 psi | 81% | 2835 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 38,798 psi | 61% | 2625 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 36,796 psi | 58% | 2625 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 47,718 psi | 75% | 2776 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,615 psi | 73% | 2749 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 44,962 psi | 70% | 2740 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,316 psi | 84% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,083 psi | 82% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,600 psi | 71% | 2697 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,477 psi | 57% | 2621 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 51,648 psi | 81% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,322 psi | 66% | 2674 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 41,002 psi | 64% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,420 psi | 59% | 2612 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 80% | 49,472 psi | 78% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,484 psi | 71% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,476 psi | 54% | 2536 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 44,933 psi | 70% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 35,940 psi | 56% | 2621 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 40,379 psi | 63% | 2762 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 90% | 40,292 psi | 63% | 2749 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 46,180 psi | 72% | 2920 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,527 psi | 70% | 2713 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,760 psi | 73% | 2828 fps | 99.4% |
| Winchester StaBALL HD | 55.7 gr | 80% | 28,558 psi | 45% | 2566 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,477 psi | 57% | 2589 fps | 95.7% |
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 82 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Nosler Ballistic Tip Hunting. Winchester StaBALL HD delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,107 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 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 1:10.0 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. Alliant Reloder-25, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | Nosler Ballistic Tip Hunting 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.