Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 156gr | Brenneke TAG bullet and 77 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% | 54,447 psi | 85% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,651 psi | 87% | 2900 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,116 psi | 90% | 3035 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 82% | 57,014 psi | 89% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,971 psi | 89% | 2969 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,694 psi | 86% | 2976 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,805 psi | 76% | 2867 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,337 psi | 68% | 2831 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,884 psi | 89% | 2956 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,143 psi | 85% | 2917 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,289 psi | 88% | 2956 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,592 psi | 86% | 2969 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,680 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 2999 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,159 psi | 88% | 3025 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,492 psi | 89% | 2936 fps | 97.2% |
| Bofors RP15 | <<locked>> | 98% | 57,319 psi | 90% | 3012 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,778 psi | 80% | 2940 fps | 99.1% |
| Bofors RP5 | <<locked>> | 94% | 54,592 psi | 86% | 2969 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 54,665 psi | 86% | 2851 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 2959 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 54,085 psi | 85% | 2907 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,739 psi | 89% | 2917 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 54,520 psi | 85% | 2910 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,276 psi | 90% | 2953 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,290 psi | 90% | 2877 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,882 psi | 84% | 3074 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,418 psi | 85% | 2943 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,478 psi | 89% | 2894 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,275 psi | 88% | 2874 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,217 psi | 88% | 2894 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,666 psi | 87% | 2894 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 96% | 56,173 psi | 88% | 3009 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 38,885 psi | 61% | 2730 fps | 96.3% |
| Lovex S065 | <<locked>> | 86% | 56,826 psi | 89% | 2871 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,911 psi | 86% | 2867 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 2884 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,406 psi | 90% | 2949 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 38,812 psi | 61% | 2753 fps | 98.5% |
| Norma MRP | <<locked>> | 92% | 54,244 psi | 85% | 2989 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,375 psi | 85% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,072 psi | 89% | 3031 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 88% | 56,797 psi | 89% | 2946 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,347 psi | 87% | 2963 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 1847 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,740 psi | 90% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,854 psi | 88% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,259 psi | 85% | 2956 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2953 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 55,869 psi | 88% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,447 psi | 85% | 2881 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 55,695 psi | 87% | 2943 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 54,665 psi | 86% | 2851 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,826 psi | 89% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,911 psi | 86% | 2867 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,551 psi | 90% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,912 psi | 88% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,130 psi | 88% | 2828 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,259 psi | 87% | 2936 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 55,608 psi | 87% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,796 psi | 87% | 2871 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 54,853 psi | 86% | 2887 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,217 psi | 88% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 57,014 psi | 89% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,086 psi | 88% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,753 psi | 87% | 2894 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 55,274 psi | 87% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,215 psi | 85% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,128 psi | 85% | 2986 fps | 98.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3022 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2956 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,825 psi | 87% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,085 psi | 85% | 2907 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,450 psi | 90% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,188 psi | 88% | 2910 fps | 99.8% |
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% | 33,562 psi | 53% | 2484 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 45,353 psi | 71% | 2736 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 42,772 psi | 67% | 2776 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 53,621 psi | 84% | 2812 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,942 psi | 59% | 2618 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 38,682 psi | 61% | 2664 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 37,144 psi | 58% | 2625 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 90% | 31,169 psi | 49% | 2523 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,555 psi | 68% | 2743 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,459 psi | 79% | 2861 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,971 psi | 60% | 2615 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,707 psi | 53% | 2549 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,358 psi | 51% | 2513 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,123 psi | 44% | 2421 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,288 psi | 55% | 2651 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,763 psi | 78% | 2818 fps | 95.6% |
| Bofors RP15 | <<locked>> | 82% | 33,446 psi | 52% | 2543 fps | 95% |
| Bofors RP30 | <<locked>> | 90% | 35,839 psi | 56% | 2638 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 33,707 psi | 53% | 2549 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 48,254 psi | 76% | 2743 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 35,563 psi | 56% | 2589 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 47,210 psi | 74% | 2792 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 49,922 psi | 78% | 2808 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 41,437 psi | 65% | 2674 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,625 psi | 64% | 2654 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,089 psi | 64% | 2628 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,605 psi | 53% | 2625 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 46,847 psi | 73% | 2818 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,758 psi | 69% | 2677 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,617 psi | 78% | 2769 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 43,149 psi | 68% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,350 psi | 63% | 2615 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 37,101 psi | 58% | 2638 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 36,230 psi | 57% | 2664 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 47,065 psi | 74% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,397 psi | 71% | 2707 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 28,703 psi | 45% | 2356 fps | 96% |
| Norma 204 | <<locked>> | 80% | 43,613 psi | 68% | 2713 fps | 98% |
| Norma 217 | <<locked>> | 94% | 31,647 psi | 50% | 2569 fps | 95.8% |
| Norma MRP | 56.6 gr | 80% | 35,114 psi | 55% | 2615 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 44,643 psi | 70% | 2726 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 36,753 psi | 58% | 2644 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 43,395 psi | 68% | 2723 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 32,460 psi | 51% | 2520 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 44% | 1650 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,751 psi | 84% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,440 psi | 71% | 2762 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,656 psi | 68% | 2779 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,284 psi | 47% | 2526 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,148 psi | 66% | 2812 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 52,417 psi | 82% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,276 psi | 62% | 2598 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 37,246 psi | 58% | 2598 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 48,254 psi | 76% | 2743 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,065 psi | 74% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,397 psi | 71% | 2707 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,853 psi | 84% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,518 psi | 82% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,035 psi | 72% | 2664 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,912 psi | 58% | 2592 fps | 96.6% |
| Somchem S355 | <<locked>> | 80% | 52,243 psi | 82% | 2789 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 39,842 psi | 62% | 2582 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,626 psi | 65% | 2680 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,739 psi | 59% | 2579 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 50,053 psi | 78% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,151 psi | 72% | 2720 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,605 psi | 51% | 2451 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 45,252 psi | 71% | 2720 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,245 psi | 57% | 2585 fps | 99.8% |
| Vihtavuori N560 | 59.5 gr | 84% | 40,959 psi | 64% | 2736 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 37,985 psi | 60% | 2657 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 96% | 43,729 psi | 69% | 2828 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,194 psi | 71% | 2680 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,210 psi | 74% | 2792 fps | 99.7% |
| Winchester StaBALL HD | 56 gr | 80% | 28,529 psi | 45% | 2530 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,345 psi | 54% | 2500 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 77 powders for .270 Weath. Mag. loaded with the .277 | 156gr | Brenneke TAG. Hodgdon Retumbo delivers the highest muzzle velocity at 3,074 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,074 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 156.0 gr projectile in 0.277" calls for a 1:11.0 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 | 156gr | Brenneke TAG 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.