Load Specifications
Load data in caliber 6.8 Western with .277 | 156gr | Brenneke TAG bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Accurate MAGPRO.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 58,668 psi | 90% | 2808 fps | 99.8% |
| Accurate 3100 | <<locked>> | 96% | 54,926 psi | 85% | 2818 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 58,421 psi | 90% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,521 psi | 87% | 2854 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 57,595 psi | 89% | 2972 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 84% | 58,059 psi | 89% | 2812 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,783 psi | 89% | 2917 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 96% | 55,376 psi | 85% | 2917 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,122 psi | 71% | 2749 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,683 psi | 63% | 2700 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,869 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,711 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,129 psi | 85% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,043 psi | 88% | 2900 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,042 psi | 85% | 2910 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,927 psi | 86% | 2877 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,561 psi | 79% | 2881 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,289 psi | 87% | 2969 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 57,363 psi | 88% | 2874 fps | 96.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,682 psi | 89% | 2949 fps | 99.6% |
| Bofors RP3 | <<locked>> | 82% | 56,637 psi | 87% | 2802 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,529 psi | 73% | 2815 fps | 97.9% |
| Bofors RP5 | <<locked>> | 96% | 55,042 psi | 85% | 2910 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 55,825 psi | 86% | 2802 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,836 psi | 78% | 2838 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 82% | 56,898 psi | 88% | 2825 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 58,653 psi | 90% | 2910 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 57,711 psi | 89% | 2867 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,187 psi | 85% | 2851 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 96% | 58,117 psi | 89% | 2897 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 58,015 psi | 89% | 2831 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,517 psi | 78% | 2943 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 55,347 psi | 85% | 2894 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,941 psi | 57% | 1759 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,638 psi | 89% | 2799 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,392 psi | 88% | 2841 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,566 psi | 89% | 2828 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 56,884 psi | 88% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,608 psi | 87% | 2841 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 98% | 56,608 psi | 87% | 2946 fps | 98.9% |
| Lovex S062 | <<locked>> | 82% | 57,856 psi | 89% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,827 psi | 89% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,825 psi | 86% | 2818 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,315 psi | 80% | 2779 fps | 100% |
| Norma 203B | <<locked>> | 82% | 58,697 psi | 90% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 90% | 58,508 psi | 90% | 2900 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 36,143 psi | 56% | 2621 fps | 96.6% |
| Norma MRP | <<locked>> | 96% | 58,813 psi | 90% | 2992 fps | 100% |
| Norma URP | <<locked>> | 88% | 55,143 psi | 85% | 2838 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,638 psi | 89% | 2972 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 90% | 57,725 psi | 89% | 2897 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,492 psi | 85% | 2900 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 58% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,724 psi | 87% | 2815 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 58,740 psi | 90% | 2913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,579 psi | 87% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,027 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,966 psi | 78% | 2943 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 56,797 psi | 87% | 2799 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,390 psi | 85% | 2828 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 94% | 56,347 psi | 87% | 2887 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 55,825 psi | 86% | 2802 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,827 psi | 89% | 2825 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,856 psi | 89% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,825 psi | 86% | 2818 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 58,726 psi | 90% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,246 psi | 88% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,116 psi | 88% | 2779 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,883 psi | 86% | 2881 fps | 99.5% |
| Somchem S355 | <<locked>> | 84% | 56,797 psi | 87% | 2799 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,971 psi | 88% | 2822 fps | 98.3% |
| Somchem S365 | <<locked>> | 90% | 55,288 psi | 85% | 2838 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,695 psi | 87% | 2854 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 86% | 57,986 psi | 89% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,058 psi | 88% | 2828 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,507 psi | 87% | 2841 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 82% | 58,624 psi | 90% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 56,028 psi | 86% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 58,276 psi | 90% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 58,711 psi | 90% | 2989 fps | 98.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,998 psi | 83% | 2897 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,623 psi | 87% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,926 psi | 85% | 2858 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,334 psi | 88% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,058 psi | 88% | 2858 fps | 99.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 55,013 psi | 85% | 2756 fps | 99.6% |
| Accurate 3100 | <<locked>> | 80% | 31,401 psi | 48% | 2369 fps | 96.2% |
| Accurate 4064 | <<locked>> | 80% | 54,723 psi | 84% | 2723 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,714 psi | 66% | 2631 fps | 99.9% |
| Accurate MAGPRO | 61.8 gr | 90% | 46,456 psi | 71% | 2782 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 51,314 psi | 79% | 2713 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,595 psi | 59% | 2566 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 88% | 41,959 psi | 65% | 2667 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 40,205 psi | 62% | 2625 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 33,388 psi | 51% | 2516 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,330 psi | 81% | 2736 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,394 psi | 64% | 2644 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,761 psi | 73% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,377 psi | 59% | 2556 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 36,347 psi | 56% | 2552 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,414 psi | 47% | 2405 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,442 psi | 44% | 2365 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,967 psi | 51% | 2530 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,780 psi | 83% | 2815 fps | 95.5% |
| Bofors RP15 | <<locked>> | 86% | 36,085 psi | 56% | 2546 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 52,997 psi | 82% | 2749 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 38,566 psi | 59% | 2635 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 36,347 psi | 56% | 2552 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 46,122 psi | 71% | 2641 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 38,537 psi | 59% | 2592 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 53,287 psi | 82% | 2772 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,802 psi | 69% | 2684 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 47,529 psi | 73% | 2700 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 88% | 44,976 psi | 69% | 2677 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,034 psi | 68% | 2657 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,986 psi | 60% | 2530 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,056 psi | 55% | 2621 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 44,179 psi | 68% | 2707 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 42% | 1568 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,012 psi | 83% | 2746 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,756 psi | 64% | 2575 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,543 psi | 73% | 2667 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 40,915 psi | 63% | 2582 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,772 psi | 67% | 2618 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 88% | 40,364 psi | 62% | 2648 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 54,230 psi | 83% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,947 psi | 69% | 2618 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 43,294 psi | 67% | 2605 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 28,964 psi | 45% | 2303 fps | 95% |
| Norma 203B | <<locked>> | 80% | 55,042 psi | 85% | 2792 fps | 100% |
| Norma 204 | <<locked>> | 80% | 41,423 psi | 64% | 2605 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 33,721 psi | 52% | 2556 fps | 95.5% |
| Norma MRP | 53.9 gr | 80% | 33,040 psi | 51% | 2497 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 42,366 psi | 65% | 2625 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 39,914 psi | 61% | 2651 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 41,133 psi | 63% | 2615 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 35,462 psi | 55% | 2530 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 43% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,953 psi | 81% | 2756 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,807 psi | 78% | 2805 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,786 psi | 66% | 2651 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,191 psi | 63% | 2667 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,793 psi | 50% | 2530 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 49,966 psi | 77% | 2700 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 39,958 psi | 61% | 2546 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 37,550 psi | 58% | 2543 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 46,122 psi | 71% | 2641 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,947 psi | 69% | 2618 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 54,230 psi | 83% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,294 psi | 67% | 2605 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,343 psi | 79% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,401 psi | 78% | 2585 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,077 psi | 68% | 2569 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,217 psi | 57% | 2536 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 49,850 psi | 77% | 2697 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,526 psi | 67% | 2595 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 39,189 psi | 60% | 2582 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,621 psi | 55% | 2470 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 47,790 psi | 74% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,700 psi | 67% | 2618 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 35,215 psi | 54% | 2454 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 55,042 psi | 85% | 2717 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 43,178 psi | 66% | 2625 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 34,011 psi | 52% | 2477 fps | 99% |
| Vihtavuori N560 | 59.3 gr | 88% | 44,338 psi | 68% | 2740 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 92% | 40,915 psi | 63% | 2657 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,902 psi | 66% | 2585 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,034 psi | 69% | 2687 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,803 psi | 41% | 2402 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,478 psi | 58% | 2513 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 91 powders for 6.8 Western loaded with the .277 | 156gr | Brenneke TAG. Winchester StaBALL HD delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,759 fps to 3,015 fps. ADI AR 2217 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, 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. Vihtavuori N560, Norma MRP, Accurate MAGPRO rank at the top here: for 6.8 Western with the .277 | 156gr | Brenneke TAG they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 7977 Enduron, IMR 8133 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.