Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Brenneke TOG bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC and Vihtavuori N560.
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% | 54,201 psi | 85% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,405 psi | 87% | 2943 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,434 psi | 88% | 3071 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 56,594 psi | 89% | 2900 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,333 psi | 88% | 3005 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 96% | 57,653 psi | 90% | 3068 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,327 psi | 76% | 2900 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,018 psi | 67% | 2861 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,217 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,667 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,724 psi | 87% | 2992 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,566 psi | 90% | 3061 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,042 psi | 86% | 2972 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,360 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,419 psi | 87% | 3068 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,985 psi | 88% | 2966 fps | 96.6% |
| Bofors RP15 | <<locked>> | 98% | 56,405 psi | 88% | 3045 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,212 psi | 79% | 2972 fps | 98.7% |
| Bofors RP5 | <<locked>> | 96% | 57,566 psi | 90% | 3061 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 54,375 psi | 85% | 2890 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2992 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 86% | 57,334 psi | 90% | 3005 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,217 psi | 88% | 2956 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 53,969 psi | 85% | 2943 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,405 psi | 88% | 2982 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,739 psi | 89% | 2920 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,214 psi | 83% | 3110 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 53,780 psi | 84% | 2982 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 58% | 1841 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,028 psi | 88% | 2933 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,869 psi | 88% | 2917 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 55,811 psi | 87% | 2936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,158 psi | 86% | 2930 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 55,463 psi | 87% | 3045 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 56,550 psi | 89% | 2913 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,636 psi | 86% | 2910 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,855 psi | 89% | 2989 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 38,609 psi | 61% | 2789 fps | 98% |
| Norma MRP | <<locked>> | 94% | 57,450 psi | 90% | 3084 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,421 psi | 90% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,246 psi | 88% | 3064 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 56,275 psi | 88% | 2986 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,563 psi | 86% | 2999 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 1883 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,000 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,405 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,696 psi | 90% | 3054 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3107 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,762 psi | 76% | 2986 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 55,666 psi | 87% | 2890 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,421 psi | 90% | 2972 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 92% | 55,158 psi | 86% | 2979 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 54,375 psi | 85% | 2890 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,550 psi | 89% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,636 psi | 86% | 2910 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,087 psi | 89% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,593 psi | 87% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,883 psi | 88% | 2867 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,723 psi | 86% | 2976 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 55,361 psi | 87% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,361 psi | 87% | 2907 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 54,346 psi | 85% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,811 psi | 87% | 2953 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,695 psi | 89% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,651 psi | 87% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,201 psi | 87% | 2930 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 54,911 psi | 86% | 2927 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,377 psi | 90% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,290 psi | 90% | 3081 fps | 99% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 3061 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 2989 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,259 psi | 87% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,334 psi | 90% | 3005 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,362 psi | 88% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,651 psi | 87% | 2949 fps | 99.6% |
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% | 33,779 psi | 53% | 2526 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 45,368 psi | 71% | 2782 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 42,496 psi | 67% | 2812 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 53,258 psi | 83% | 2851 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,811 psi | 59% | 2651 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 86% | 41,263 psi | 65% | 2759 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 94% | 39,653 psi | 62% | 2720 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 31,212 psi | 49% | 2559 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,236 psi | 68% | 2782 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,966 psi | 78% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,840 psi | 59% | 2651 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,926 psi | 56% | 2644 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,358 psi | 51% | 2556 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,297 psi | 44% | 2461 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,186 psi | 55% | 2690 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,429 psi | 77% | 2851 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 35,824 psi | 56% | 2641 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 38,305 psi | 60% | 2733 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 35,926 psi | 56% | 2644 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 48,138 psi | 75% | 2785 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 37,840 psi | 59% | 2680 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 46,920 psi | 74% | 2828 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 49,559 psi | 78% | 2844 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,176 psi | 65% | 2707 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,265 psi | 68% | 2749 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,901 psi | 64% | 2667 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,417 psi | 52% | 2654 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 46,427 psi | 73% | 2858 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 44% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,526 psi | 68% | 2713 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,327 psi | 77% | 2805 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,033 psi | 67% | 2723 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,219 psi | 63% | 2648 fps | 95.1% |
| IMR 7828 SSC | 58.6 gr | 86% | 39,624 psi | 62% | 2736 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 46,978 psi | 74% | 2756 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,310 psi | 71% | 2749 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,051 psi | 46% | 2402 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,366 psi | 68% | 2753 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 31,705 psi | 50% | 2605 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 35,070 psi | 55% | 2654 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 44,454 psi | 70% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,291 psi | 62% | 2743 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 43,134 psi | 68% | 2762 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 32,503 psi | 51% | 2552 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 1683 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,055 psi | 83% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,208 psi | 71% | 2802 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,337 psi | 68% | 2818 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,663 psi | 51% | 2631 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 41,843 psi | 66% | 2844 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,315 psi | 82% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,160 psi | 61% | 2631 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 36,970 psi | 58% | 2628 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 80% | 48,138 psi | 75% | 2785 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,978 psi | 74% | 2756 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,310 psi | 71% | 2749 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,476 psi | 84% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,272 psi | 82% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,977 psi | 72% | 2703 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,651 psi | 57% | 2625 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 52,069 psi | 82% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,438 psi | 67% | 2677 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 41,408 psi | 65% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,739 psi | 59% | 2618 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 49,864 psi | 78% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,905 psi | 72% | 2762 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,634 psi | 51% | 2490 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 45,092 psi | 71% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,318 psi | 57% | 2631 fps | 99.6% |
| Vihtavuori N560 | 59.5 gr | 84% | 40,683 psi | 64% | 2769 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 90% | 40,596 psi | 64% | 2756 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 43,366 psi | 68% | 2861 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,889 psi | 70% | 2720 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,920 psi | 74% | 2828 fps | 99.5% |
| Winchester StaBALL HD | 56 gr | 80% | 28,703 psi | 45% | 2569 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,825 psi | 58% | 2595 fps | 95.9% |
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 81 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Brenneke TOG. Winchester StaBALL HD delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,114 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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. Winchester StaBALL HD, IMR 7828 SSC, Vihtavuori N560 rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | Brenneke TOG 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.