Load Specifications
Load data in caliber 6.8 Western with .277 | 150gr | Barnes MRX BT bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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.
A valid access license is required to use the Personalized Load Calculator.
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 2495 | <<locked>> | 82% | 58,247 psi | 90% | 2769 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,753 psi | 86% | 2805 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 58,653 psi | 90% | 2913 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 58,726 psi | 90% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,608 psi | 87% | 2900 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,319 psi | 88% | 3012 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 86% | 58,813 psi | 90% | 2867 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,667 psi | 89% | 2956 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 98% | 55,376 psi | 85% | 2956 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,811 psi | 58% | 2667 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,289 psi | 87% | 2838 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,405 psi | 87% | 2861 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,812 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,056 psi | 85% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,174 psi | 88% | 2943 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 58,682 psi | 90% | 3009 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,405 psi | 85% | 2923 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,776 psi | 74% | 2864 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,912 psi | 86% | 3015 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,577 psi | 82% | 2927 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 57,087 psi | 88% | 2854 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,743 psi | 67% | 2785 fps | 96.3% |
| Bofors RP5ᴾ | <<locked>> | 100% | 58,682 psi | 90% | 3009 fps | 99.5% |
| Bofors RP7 | <<locked>> | 88% | 56,275 psi | 87% | 2848 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,384 psi | 73% | 2808 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 84% | 57,493 psi | 88% | 2877 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,129 psi | 85% | 2904 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 58,131 psi | 89% | 2917 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 96% | 55,434 psi | 85% | 2894 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 58,189 psi | 90% | 2936 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,972 psi | 89% | 2877 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,847 psi | 72% | 2910 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 88% | 55,288 psi | 85% | 2940 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 56% | 1775 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 58,262 psi | 90% | 2851 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,159 psi | 88% | 2841 fps | 99.8% |
| IMR 4350 | <<locked>> | 92% | 57,609 psi | 89% | 2887 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 58,102 psi | 89% | 2877 fps | 99.8% |
| IMR 4831 | <<locked>> | 92% | 57,116 psi | 88% | 2894 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,914 psi | 89% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,695 psi | 87% | 2881 fps | 97.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,492 psi | 87% | 2986 fps | 98.4% |
| Lovex S062 | <<locked>> | 84% | 58,378 psi | 90% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 58,276 psi | 90% | 2874 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 56,188 psi | 86% | 2864 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,631 psi | 75% | 2762 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 55,695 psi | 86% | 2848 fps | 100% |
| Norma 204 | <<locked>> | 92% | 58,755 psi | 90% | 2946 fps | 99.2% |
| Norma MRP | <<locked>> | 98% | 58,450 psi | 90% | 3031 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 55,303 psi | 85% | 2884 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,608 psi | 87% | 2874 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,551 psi | 89% | 3012 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 92% | 57,769 psi | 89% | 2943 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,111 psi | 79% | 2874 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 57% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,421 psi | 88% | 2867 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 58,595 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,695 psi | 87% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,172 psi | 85% | 2956 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,876 psi | 72% | 2904 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 82% | 56,579 psi | 87% | 2799 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,246 psi | 88% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,622 psi | 86% | 2871 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 96% | 56,376 psi | 87% | 2927 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 88% | 56,275 psi | 87% | 2848 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 58,276 psi | 90% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 58,378 psi | 90% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,188 psi | 86% | 2864 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,506 psi | 85% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 58,001 psi | 89% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,812 psi | 89% | 2828 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,912 psi | 86% | 2923 fps | 99.2% |
| Somchem S355 | <<locked>> | 86% | 57,014 psi | 88% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,421 psi | 88% | 2864 fps | 97.8% |
| Somchem S365 | <<locked>> | 92% | 54,955 psi | 85% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,855 psi | 87% | 2900 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 82% | 57,363 psi | 88% | 2756 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,464 psi | 88% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 58,697 psi | 90% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,334 psi | 88% | 2877 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,420 psi | 87% | 2881 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 82% | 55,622 psi | 86% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,304 psi | 87% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,754 psi | 89% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 58,479 psi | 90% | 3028 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,980 psi | 77% | 2871 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,101 psi | 88% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,129 psi | 85% | 2904 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,619 psi | 79% | 2995 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,145 psi | 88% | 2900 fps | 99.1% |
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 2495 | <<locked>> | 80% | 54,331 psi | 84% | 2717 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 52,170 psi | 80% | 2749 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 31,343 psi | 48% | 2408 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,576 psi | 79% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,856 psi | 61% | 2618 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 92% | 46,166 psi | 71% | 2815 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 48,907 psi | 75% | 2717 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,754 psi | 60% | 2605 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 45,121 psi | 69% | 2769 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 98% | 35,549 psi | 55% | 2605 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,501 psi | 76% | 2740 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,779 psi | 81% | 2808 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,740 psi | 60% | 2628 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,440 psi | 68% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,406 psi | 59% | 2595 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,711 psi | 60% | 2648 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,282 psi | 44% | 2385 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,211 psi | 46% | 2454 fps | 95.4% |
| Alliant Reloder-26 | 53.9 gr | 80% | 30,443 psi | 47% | 2500 fps | 96.5% |
| Bofors RP15 | <<locked>> | 90% | 38,421 psi | 59% | 2638 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 49,995 psi | 77% | 2753 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,727 psi | 63% | 2723 fps | 95.3% |
| Bofors RP5 | <<locked>> | 88% | 38,711 psi | 60% | 2648 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,685 psi | 67% | 2631 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 41,350 psi | 64% | 2684 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 50,198 psi | 77% | 2766 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,916 psi | 64% | 2667 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 44,933 psi | 69% | 2690 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 45,150 psi | 69% | 2717 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,369 psi | 73% | 2759 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,347 psi | 56% | 2520 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,319 psi | 59% | 2713 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 41,046 psi | 63% | 2684 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 42% | 1585 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,474 psi | 79% | 2749 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,534 psi | 82% | 2782 fps | 99.6% |
| IMR 4350 | <<locked>> | 80% | 39,407 psi | 61% | 2562 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,107 psi | 69% | 2661 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 38,305 psi | 59% | 2569 fps | 99.1% |
| IMR 4895 | <<locked>> | 80% | 54,172 psi | 83% | 2835 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,179 psi | 68% | 2661 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 43,047 psi | 66% | 2740 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 51,634 psi | 79% | 2743 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,453 psi | 65% | 2608 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 40,828 psi | 63% | 2595 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 30,632 psi | 47% | 2388 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 52,098 psi | 80% | 2795 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,986 psi | 60% | 2592 fps | 95.1% |
| Norma MRP | 54.9 gr | 84% | 35,317 psi | 54% | 2595 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,726 psi | 61% | 2615 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 80% | 52,939 psi | 81% | 2822 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 42,888 psi | 66% | 2749 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,595 psi | 59% | 2602 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 92% | 38,043 psi | 59% | 2625 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 43% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,328 psi | 77% | 2756 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,268 psi | 73% | 2802 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,798 psi | 61% | 2638 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,508 psi | 59% | 2651 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,070 psi | 54% | 2625 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 53,185 psi | 82% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,036 psi | 72% | 2697 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,801 psi | 66% | 2641 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 84% | 37,492 psi | 58% | 2579 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,685 psi | 67% | 2631 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,453 psi | 65% | 2608 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 51,634 psi | 79% | 2743 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,828 psi | 63% | 2595 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,501 psi | 75% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,037 psi | 74% | 2595 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,524 psi | 64% | 2552 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,914 psi | 61% | 2635 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 47,094 psi | 72% | 2694 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,688 psi | 72% | 2687 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,332 psi | 56% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,549 psi | 55% | 2507 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 53,824 psi | 83% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,041 psi | 83% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,179 psi | 70% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,046 psi | 63% | 2608 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 37,753 psi | 58% | 2549 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 52,098 psi | 80% | 2720 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,437 psi | 62% | 2612 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,618 psi | 49% | 2461 fps | 97.9% |
| Vihtavuori N560 | 58.9 gr | 90% | 44,280 psi | 68% | 2779 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 96% | 43,424 psi | 67% | 2749 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,292 psi | 62% | 2582 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,148 psi | 65% | 2671 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,961 psi | 38% | 2362 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,161 psi | 62% | 2605 fps | 95.8% |
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 95 powders for 6.8 Western loaded with the .277 | 150gr | Barnes MRX BT. Norma MRP delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,775 fps to 3,031 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2217, ADI AR 2225 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 6.8 Western with the .277 | 150gr | Barnes MRX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Norma 217, ReloadSwiss RS 80, Vihtavuori N568 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.