Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Barnes Solid RN bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Accurate High Country 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 57,203 psi | 90% | 2953 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,984 psi | 86% | 2933 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,824 psi | 86% | 3054 fps | 99% |
| Accurate MAGPRO | <<locked>> | 94% | 55,608 psi | 87% | 3054 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 56,217 psi | 88% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,738 psi | 87% | 2995 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 96% | 57,087 psi | 89% | 3054 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2884 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,438 psi | 67% | 2848 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,854 psi | 88% | 2989 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,854 psi | 88% | 2989 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,464 psi | 90% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,825 psi | 87% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,985 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,158 psi | 86% | 2982 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,971 psi | 89% | 3051 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,418 psi | 85% | 2963 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,577 psi | 84% | 3022 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,505 psi | 85% | 3051 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,405 psi | 87% | 2953 fps | 96.4% |
| Bofors RP15 | <<locked>> | 98% | 55,811 psi | 87% | 3031 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,705 psi | 78% | 2963 fps | 98.6% |
| Bofors RP5 | <<locked>> | 96% | 56,971 psi | 89% | 3051 fps | 99.8% |
| Bofors RP7 | <<locked>> | 86% | 57,421 psi | 90% | 2933 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,562 psi | 82% | 2976 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 86% | 56,681 psi | 89% | 2992 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,608 psi | 87% | 2943 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 56,942 psi | 89% | 2989 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,825 psi | 87% | 2972 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,086 psi | 88% | 2910 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,402 psi | 82% | 3091 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 57,290 psi | 90% | 3031 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,941 psi | 58% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,419 psi | 87% | 2920 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,521 psi | 87% | 2907 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 55,158 psi | 86% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,694 psi | 86% | 2920 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 96% | 54,882 psi | 86% | 3031 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 55,956 psi | 88% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,667 psi | 90% | 2953 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,260 psi | 88% | 2976 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 38,130 psi | 60% | 2776 fps | 97.8% |
| Norma MRP | <<locked>> | 94% | 56,840 psi | 89% | 3074 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,029 psi | 89% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,405 psi | 87% | 3048 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 55,666 psi | 87% | 2976 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,722 psi | 84% | 2982 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 1880 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,507 psi | 89% | 2992 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,781 psi | 86% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,072 psi | 89% | 3045 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 3091 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,066 psi | 75% | 2969 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 55,245 psi | 87% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,840 psi | 89% | 2959 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 54,549 psi | 85% | 2966 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 57,421 psi | 90% | 2933 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,956 psi | 88% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,667 psi | 90% | 2953 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,666 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,187 psi | 86% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,274 psi | 87% | 2854 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,114 psi | 85% | 2963 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 54,940 psi | 86% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,897 psi | 86% | 2897 fps | 98.2% |
| Somchem S365 | <<locked>> | 90% | 57,203 psi | 90% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,245 psi | 87% | 2940 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,043 psi | 88% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,274 psi | 87% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,679 psi | 86% | 2920 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 54,317 psi | 85% | 2913 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,724 psi | 89% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,710 psi | 89% | 3068 fps | 98.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3045 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,371 psi | 77% | 2976 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,708 psi | 86% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,681 psi | 89% | 2992 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,579 psi | 87% | 3104 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,085 psi | 86% | 2936 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% | 33,272 psi | 52% | 2510 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 44,686 psi | 70% | 2766 fps | 100% |
| Accurate High Country | 57.5 gr | 82% | 38,682 psi | 61% | 2736 fps | 95.3% |
| Accurate MAGPRO | 62.8 gr | 88% | 44,976 psi | 70% | 2861 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 52,852 psi | 83% | 2841 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,304 psi | 58% | 2638 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 86% | 40,756 psi | 64% | 2746 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 94% | 39,233 psi | 61% | 2707 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 90% | 30,879 psi | 48% | 2543 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,652 psi | 59% | 2641 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,652 psi | 59% | 2641 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,070 psi | 85% | 2864 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,815 psi | 67% | 2772 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,530 psi | 78% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,318 psi | 58% | 2635 fps | 96% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,592 psi | 56% | 2635 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,024 psi | 50% | 2543 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,876 psi | 44% | 2444 fps | 95.6% |
| Alliant Reloder-26 | 57.8 gr | 80% | 34,838 psi | 55% | 2680 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,141 psi | 82% | 2897 fps | 95.6% |
| Bofors RP15 | <<locked>> | 84% | 35,302 psi | 55% | 2628 fps | 95.2% |
| Bofors RP30 | <<locked>> | 92% | 37,797 psi | 59% | 2720 fps | 95.5% |
| Bofors RP5 | <<locked>> | 82% | 35,592 psi | 56% | 2635 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 47,500 psi | 74% | 2769 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 37,405 psi | 59% | 2664 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 46,311 psi | 73% | 2815 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 48,950 psi | 77% | 2831 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 43,613 psi | 68% | 2756 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,757 psi | 67% | 2736 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,495 psi | 63% | 2657 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,288 psi | 55% | 2707 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 45,876 psi | 72% | 2841 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,004 psi | 67% | 2700 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,979 psi | 77% | 2795 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 42,656 psi | 67% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,453 psi | 67% | 2694 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 39,102 psi | 61% | 2723 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 46,615 psi | 73% | 2746 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 44,962 psi | 70% | 2740 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 28,689 psi | 45% | 2388 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 43,018 psi | 67% | 2740 fps | 97.4% |
| Norma 217 | <<locked>> | 96% | 33,359 psi | 52% | 2651 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 34,708 psi | 54% | 2644 fps | 96.7% |
| Norma URP | <<locked>> | 80% | 44,063 psi | 69% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 38,783 psi | 61% | 2730 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 42,786 psi | 67% | 2753 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 34,592 psi | 54% | 2608 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 45% | 1680 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,605 psi | 82% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,599 psi | 70% | 2789 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,743 psi | 67% | 2802 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,271 psi | 51% | 2618 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 41,437 psi | 65% | 2835 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 51,837 psi | 81% | 2831 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 38,827 psi | 61% | 2621 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 36,593 psi | 57% | 2618 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 47,500 psi | 74% | 2769 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,615 psi | 73% | 2746 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 44,962 psi | 70% | 2740 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,069 psi | 83% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,837 psi | 81% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,629 psi | 72% | 2697 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,274 psi | 57% | 2612 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 51,648 psi | 81% | 2825 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,177 psi | 66% | 2667 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 40,770 psi | 64% | 2710 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,231 psi | 58% | 2605 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 49,472 psi | 78% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,295 psi | 71% | 2746 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,476 psi | 54% | 2533 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 44,730 psi | 70% | 2753 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 35,897 psi | 56% | 2618 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 40,161 psi | 63% | 2756 fps | 95% |
| Vihtavuori N565 | <<locked>> | 90% | 40,089 psi | 63% | 2743 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 98% | 45,992 psi | 72% | 2913 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,353 psi | 70% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,528 psi | 73% | 2822 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,398 psi | 45% | 2556 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,332 psi | 57% | 2582 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 80 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Barnes Solid RN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,104 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 150.0 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. Accurate MAGPRO, Accurate High Country, Alliant Reloder-26 rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | Barnes Solid RN 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.