Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 170gr | Nosler Ballistic Tip Hunting bullet and 73 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 Hodgdon Retumbo.
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% | 57,145 psi | 90% | 2779 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,723 psi | 86% | 2753 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,564 psi | 87% | 2881 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 90% | 55,463 psi | 87% | 2815 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 94% | 56,724 psi | 89% | 2877 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,111 psi | 80% | 2789 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 2753 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,550 psi | 87% | 2802 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,666 psi | 89% | 2815 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,969 psi | 86% | 2805 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,840 psi | 89% | 2871 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,766 psi | 86% | 2785 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 2897 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,969 psi | 86% | 2877 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,781 psi | 86% | 2785 fps | 97.5% |
| Bofors RP15 | <<locked>> | 96% | 55,999 psi | 88% | 2861 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,621 psi | 84% | 2858 fps | 99.7% |
| Bofors RP5 | <<locked>> | 94% | 56,840 psi | 89% | 2871 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 56,840 psi | 89% | 2749 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,275 psi | 88% | 2867 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 56,188 psi | 88% | 2805 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,274 psi | 87% | 2762 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 56,681 psi | 89% | 2815 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,506 psi | 87% | 2799 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,825 psi | 87% | 2726 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,449 psi | 88% | 2982 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,681 psi | 89% | 2844 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 58% | 1716 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,984 psi | 86% | 2740 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,824 psi | 86% | 2723 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,926 psi | 86% | 2743 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,725 psi | 90% | 2799 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 94% | 54,665 psi | 86% | 2858 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,249 psi | 65% | 2667 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 55,419 psi | 87% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,174 psi | 90% | 2769 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,621 psi | 86% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,840 psi | 88% | 2799 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 41,350 psi | 65% | 2690 fps | 99.5% |
| Norma MRP | <<locked>> | 92% | 56,942 psi | 89% | 2894 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,724 psi | 89% | 2785 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,550 psi | 87% | 2881 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 55,463 psi | 87% | 2795 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,679 psi | 84% | 2812 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,029 psi | 60% | 1755 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,679 psi | 86% | 2776 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,710 psi | 89% | 2858 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 2979 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2881 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 90% | 56,608 psi | 89% | 2785 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 90% | 54,404 psi | 85% | 2792 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 56,840 psi | 89% | 2749 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,419 psi | 87% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,174 psi | 90% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,520 psi | 85% | 2674 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,653 psi | 90% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,288 psi | 85% | 2723 fps | 99% |
| Somchem S365 | <<locked>> | 88% | 57,406 psi | 90% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,940 psi | 86% | 2766 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 55,448 psi | 87% | 2657 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,824 psi | 86% | 2726 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,578 psi | 86% | 2749 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 56,811 psi | 89% | 2815 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 86% | 57,551 psi | 90% | 2782 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,855 psi | 89% | 2808 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,710 psi | 89% | 2897 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 98% | 56,536 psi | 89% | 2877 fps | 99.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,142 psi | 83% | 2881 fps | 98.6% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 2871 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 53,998 psi | 85% | 2684 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,507 psi | 89% | 2808 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,463 psi | 88% | 2923 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,621 psi | 86% | 2762 fps | 99.9% |
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% | 35,795 psi | 56% | 2421 fps | 99% |
| Accurate 4350 | <<locked>> | 80% | 47,805 psi | 75% | 2651 fps | 100% |
| Accurate MAGPRO | 56.5 gr | 82% | 39,305 psi | 62% | 2585 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 39,711 psi | 62% | 2539 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 35,563 psi | 56% | 2477 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 88% | 34,389 psi | 54% | 2448 fps | 95% |
| ADI AR 2225 | <<locked>> | 86% | 29,066 psi | 46% | 2359 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,847 psi | 72% | 2657 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,011 psi | 83% | 2766 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,827 psi | 62% | 2536 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,708 psi | 56% | 2487 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,461 psi | 54% | 2448 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,834 psi | 47% | 2369 fps | 98.1% |
| Alliant Reloder-26 | 55.7 gr | 80% | 37,768 psi | 59% | 2589 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 45,556 psi | 71% | 2621 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 33,344 psi | 52% | 2428 fps | 95.9% |
| Bofors RP30 | <<locked>> | 86% | 33,388 psi | 52% | 2467 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 35,708 psi | 56% | 2487 fps | 97% |
| Bofors RP7 | <<locked>> | 80% | 50,256 psi | 79% | 2651 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 32,706 psi | 51% | 2408 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 49,429 psi | 77% | 2700 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 51,837 psi | 81% | 2710 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 37,855 psi | 59% | 2480 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,275 psi | 58% | 2467 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,149 psi | 68% | 2539 fps | 100% |
| Hodgdon Retumbo | 53.4 gr | 82% | 31,169 psi | 49% | 2448 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 48,936 psi | 77% | 2730 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1532 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,484 psi | 71% | 2589 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,503 psi | 81% | 2671 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 45,455 psi | 71% | 2598 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,523 psi | 62% | 2480 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 36,506 psi | 57% | 2513 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 33,924 psi | 53% | 2497 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,110 psi | 77% | 2621 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,572 psi | 75% | 2621 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 30,922 psi | 48% | 2306 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 45,687 psi | 72% | 2631 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 29,704 psi | 47% | 2408 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 37,434 psi | 59% | 2552 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 46,876 psi | 73% | 2638 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 33,663 psi | 53% | 2457 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 45,571 psi | 71% | 2641 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,037 psi | 47% | 2349 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 45% | 1568 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,761 psi | 75% | 2674 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,890 psi | 72% | 2694 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 28,166 psi | 44% | 2359 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 38,609 psi | 61% | 2621 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 41,176 psi | 65% | 2520 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 39,189 psi | 61% | 2523 fps | 98% |
| Rottweil R 907 | <<locked>> | 80% | 50,256 psi | 79% | 2651 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,110 psi | 77% | 2621 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,572 psi | 75% | 2621 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,950 psi | 75% | 2575 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,856 psi | 61% | 2516 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 41,771 psi | 65% | 2510 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 43,859 psi | 69% | 2592 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,798 psi | 62% | 2507 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 80% | 52,243 psi | 82% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,167 psi | 75% | 2628 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,461 psi | 54% | 2388 fps | 97% |
| Vihtavuori N170 | <<locked>> | 98% | 52,982 psi | 83% | 2756 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 47,427 psi | 74% | 2631 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,624 psi | 61% | 2516 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 37,579 psi | 59% | 2543 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 35,288 psi | 55% | 2484 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 92% | 40,190 psi | 63% | 2641 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 98% | 46,804 psi | 73% | 2805 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,326 psi | 74% | 2589 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,429 psi | 77% | 2700 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,589 psi | 48% | 2480 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,332 psi | 57% | 2434 fps | 97% |
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 73 powders for .270 Weath. Mag. loaded with the .277 | 170gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 2,982 fps; across all powders the maximum-charge window runs from 1,716 fps to 2,982 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 170.0 gr projectile in 0.277" calls for a 1:9.0 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, Hodgdon Retumbo rank at the top here: for .270 Weath. Mag. with the .277 | 170gr | Nosler Ballistic Tip Hunting 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.