Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | NorthFork Bonded Core bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Ramshot Grand.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 56,710 psi | 89% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,360 psi | 85% | 2927 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,114 psi | 86% | 3045 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 82% | 55,608 psi | 87% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,216 psi | 87% | 2982 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 96% | 56,637 psi | 89% | 3045 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,297 psi | 74% | 2877 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,047 psi | 66% | 2838 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,174 psi | 90% | 2910 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,201 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,391 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,665 psi | 86% | 2969 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,463 psi | 88% | 3041 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,508 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3015 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,940 psi | 85% | 3045 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,085 psi | 86% | 2946 fps | 96.2% |
| Bofors RP15 | <<locked>> | 98% | 55,347 psi | 87% | 3022 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,979 psi | 77% | 2949 fps | 98.4% |
| Bofors RP5 | <<locked>> | 96% | 56,463 psi | 88% | 3041 fps | 99.7% |
| Bofors RP7 | <<locked>> | 86% | 57,145 psi | 90% | 2927 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 2966 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 86% | 56,130 psi | 88% | 2979 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,332 psi | 87% | 2936 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 56,478 psi | 89% | 2979 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,361 psi | 87% | 2963 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,506 psi | 87% | 2900 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3081 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 56,521 psi | 89% | 3018 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,086 psi | 58% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,940 psi | 86% | 2910 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,998 psi | 86% | 2894 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 54,868 psi | 86% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,638 psi | 90% | 2963 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 96% | 54,418 psi | 85% | 3022 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 55,666 psi | 87% | 2894 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,159 psi | 90% | 2943 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 2904 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,043 psi | 88% | 2972 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 37,579 psi | 59% | 2759 fps | 97.6% |
| Norma MRP | <<locked>> | 94% | 56,347 psi | 88% | 3064 fps | 100% |
| Norma URP | <<locked>> | 88% | 56,449 psi | 88% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,926 psi | 86% | 3041 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 88% | 55,434 psi | 87% | 2972 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,159 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,711 psi | 90% | 2933 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,840 psi | 88% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,491 psi | 85% | 2949 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,536 psi | 89% | 3035 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3077 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,413 psi | 74% | 2956 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 82% | 54,911 psi | 86% | 2874 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,362 psi | 88% | 2949 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 54,027 psi | 85% | 2956 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 57,145 psi | 90% | 2927 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,666 psi | 87% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,159 psi | 90% | 2943 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,144 psi | 88% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,882 psi | 86% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,766 psi | 86% | 2844 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,479 psi | 90% | 3012 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 54,607 psi | 86% | 2867 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,491 psi | 85% | 2887 fps | 98.1% |
| Somchem S365 | <<locked>> | 90% | 56,898 psi | 89% | 2963 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,766 psi | 86% | 2933 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 55,753 psi | 87% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,723 psi | 86% | 2900 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,230 psi | 85% | 2910 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 57,464 psi | 90% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,144 psi | 88% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,217 psi | 88% | 3061 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,883 psi | 88% | 3035 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2963 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,230 psi | 85% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,405 psi | 88% | 2986 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,650 psi | 86% | 3091 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,636 psi | 86% | 2927 fps | 99.4% |
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% | 32,996 psi | 52% | 2503 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 44,353 psi | 70% | 2759 fps | 100% |
| Accurate MAGPRO | 62.3 gr | 88% | 44,512 psi | 70% | 2851 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 52,286 psi | 82% | 2831 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,028 psi | 58% | 2628 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 40,335 psi | 63% | 2733 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 38,870 psi | 61% | 2697 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 92% | 32,489 psi | 51% | 2592 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,490 psi | 84% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,467 psi | 67% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,965 psi | 77% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,057 psi | 58% | 2625 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,157 psi | 55% | 2621 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,749 psi | 50% | 2536 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,659 psi | 43% | 2434 fps | 95.4% |
| Alliant Reloder-26 | 57.3 gr | 80% | 34,389 psi | 54% | 2667 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 51,561 psi | 81% | 2884 fps | 95.4% |
| Bofors RP15 | <<locked>> | 84% | 35,056 psi | 55% | 2618 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 37,376 psi | 59% | 2710 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 35,157 psi | 55% | 2621 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,239 psi | 74% | 2762 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 37,202 psi | 58% | 2657 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 46,006 psi | 72% | 2808 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 48,675 psi | 76% | 2822 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 43,149 psi | 68% | 2743 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,293 psi | 66% | 2723 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,190 psi | 63% | 2651 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,070 psi | 55% | 2697 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 45,353 psi | 71% | 2831 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,714 psi | 67% | 2694 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,675 psi | 76% | 2789 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 42,351 psi | 66% | 2707 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,192 psi | 66% | 2687 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 86% | 38,870 psi | 61% | 2713 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 46,325 psi | 73% | 2740 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 44,440 psi | 70% | 2726 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 28,427 psi | 45% | 2379 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 42,728 psi | 67% | 2733 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 33,011 psi | 52% | 2638 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 34,272 psi | 54% | 2631 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 43,511 psi | 68% | 2746 fps | 99.9% |
| Ramshot Grand | 59.3 gr | 86% | 38,392 psi | 60% | 2717 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 42,511 psi | 67% | 2743 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 34,214 psi | 54% | 2595 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,302 psi | 85% | 2881 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,982 psi | 81% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,324 psi | 69% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,511 psi | 67% | 2799 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 31,937 psi | 50% | 2605 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 43,918 psi | 69% | 2884 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 51,271 psi | 80% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 38,551 psi | 60% | 2615 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 36,303 psi | 57% | 2608 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 47,239 psi | 74% | 2762 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,325 psi | 73% | 2740 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 44,440 psi | 70% | 2726 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,779 psi | 83% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,532 psi | 81% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,179 psi | 71% | 2684 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,013 psi | 56% | 2605 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 51,343 psi | 80% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 41,756 psi | 65% | 2654 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,408 psi | 63% | 2703 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,956 psi | 58% | 2595 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 48,921 psi | 77% | 2740 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,991 psi | 71% | 2743 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,040 psi | 53% | 2520 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,440 psi | 70% | 2746 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,563 psi | 56% | 2612 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 86% | 42,554 psi | 67% | 2808 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 39,653 psi | 62% | 2733 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 98% | 45,382 psi | 71% | 2900 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,092 psi | 69% | 2703 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,238 psi | 72% | 2812 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,166 psi | 44% | 2546 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,071 psi | 57% | 2575 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 78 powders for .270 Weath. Mag. loaded with the .277 | 150gr | NorthFork Bonded Core. Winchester StaBALL HD delivers the highest muzzle velocity at 3,091 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,091 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 1:10.0 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. Accurate MAGPRO, Alliant Reloder-26, Ramshot Grand rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | NorthFork Bonded Core 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.