Load Specifications
Bullet:.277 | 130gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
Bullet Weight:130 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Caliber:6.8 Western load data
Case Length (l3):2.02"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:75.5 Grains of Water
Primer Size:Large Rifle
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:10.5
Load data in caliber 6.8 Western with .277 | 130gr | Atomic 29 HP bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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% | 55,854 psi | 86% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,942 psi | 88% | 3005 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,187 psi | 85% | 3051 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 56,333 psi | 87% | 2995 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,217 psi | 88% | 3104 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 56,507 psi | 87% | 3199 fps | 97.4% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,522 psi | 88% | 3199 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 82% | 58,363 psi | 90% | 3074 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,159 psi | 86% | 3028 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 58,291 psi | 90% | 3153 fps | 98.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,840 psi | 86% | 3140 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,550 psi | 85% | 3153 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 58,247 psi | 90% | 3146 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,985 psi | 88% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,145 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,725 psi | 89% | 3163 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,463 psi | 85% | 3130 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,421 psi | 88% | 3136 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,781 psi | 84% | 3136 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,779 psi | 80% | 3068 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,165 psi | 69% | 2989 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,854 psi | 86% | 3215 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 58,726 psi | 90% | 3094 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,212 psi | 77% | 3054 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 57,972 psi | 89% | 3068 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,781 psi | 84% | 3136 fps | 98.1% |
| Bofors RP7 | <<locked>> | 90% | 57,435 psi | 88% | 3054 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 58,624 psi | 90% | 3091 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,782 psi | 86% | 3104 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 55,434 psi | 85% | 3061 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 55,970 psi | 86% | 3081 fps | 96.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 58,639 psi | 90% | 3127 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 58,291 psi | 90% | 3084 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,956 psi | 86% | 3068 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,101 psi | 86% | 3140 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 56% | 1909 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,608 psi | 87% | 3031 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,477 psi | 85% | 3005 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 58,334 psi | 90% | 3048 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 58,392 psi | 90% | 3087 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,564 psi | 85% | 3028 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 57,508 psi | 88% | 3094 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 58,668 psi | 90% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,566 psi | 89% | 3074 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,258 psi | 82% | 3110 fps | 96.4% |
| Lovex S060 | <<locked>> | 82% | 57,029 psi | 88% | 2992 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,985 psi | 86% | 3005 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,680 psi | 86% | 3022 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 57,014 psi | 88% | 3068 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,832 psi | 71% | 2890 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 57,159 psi | 88% | 3015 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,943 psi | 89% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,434 psi | 87% | 3058 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,709 psi | 86% | 3084 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 58,421 psi | 90% | 3228 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 55,869 psi | 86% | 3091 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,566 psi | 89% | 3087 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,809 psi | 83% | 3130 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 94% | 58,305 psi | 90% | 3146 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,993 psi | 74% | 2992 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,188 psi | 57% | 1959 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 58,378 psi | 90% | 3071 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 58,581 psi | 90% | 3150 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,042 psi | 85% | 3127 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,246 psi | 88% | 3130 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,564 psi | 85% | 3156 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,019 psi | 68% | 3002 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 84% | 57,841 psi | 89% | 3015 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 58,102 psi | 89% | 3061 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,043 psi | 86% | 3058 fps | 97% |
| Rottweil R 905 | <<locked>> | 98% | 56,637 psi | 87% | 3120 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 57,435 psi | 88% | 3054 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,680 psi | 86% | 3022 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 55,985 psi | 86% | 3005 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,014 psi | 88% | 3068 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,217 psi | 86% | 3071 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,014 psi | 88% | 3045 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,943 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,798 psi | 90% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,361 psi | 85% | 2972 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,159 psi | 86% | 3117 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 57,551 psi | 89% | 2936 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,957 psi | 89% | 3058 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,218 psi | 90% | 3054 fps | 96.6% |
| Somchem S365 | <<locked>> | 94% | 55,230 psi | 85% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,421 psi | 88% | 3094 fps | 99% |
| Vihtavuori N133 | <<locked>> | 82% | 58,479 psi | 90% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 58,320 psi | 90% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 58,653 psi | 90% | 2989 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,724 psi | 86% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,885 psi | 89% | 3081 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,055 psi | 82% | 3009 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 56,608 psi | 87% | 2982 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,000 psi | 88% | 3087 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,841 psi | 89% | 3150 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 58,581 psi | 90% | 3215 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,870 psi | 89% | 3048 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,782 psi | 86% | 3104 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,876 psi | 72% | 3130 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,116 psi | 88% | 3051 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,827 psi | 89% | 3094 fps | 98.3% |
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% | 52,257 psi | 80% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,908 psi | 77% | 2887 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 36,550 psi | 56% | 2694 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 49,501 psi | 76% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,956 psi | 58% | 2746 fps | 98% |
| Accurate High Country | <<locked>> | 94% | 49,052 psi | 75% | 3068 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 98% | 53,476 psi | 82% | 3127 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 55,027 psi | 85% | 3022 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,586 psi | 72% | 2864 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 44,701 psi | 69% | 2904 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 48,834 psi | 75% | 3012 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,706 psi | 80% | 3091 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,817 psi | 69% | 2904 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,224 psi | 73% | 2890 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,546 psi | 78% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,811 psi | 57% | 2756 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,872 psi | 64% | 2890 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,295 psi | 68% | 2894 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,817 psi | 69% | 2949 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,006 psi | 42% | 2487 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,838 psi | 54% | 2733 fps | 95.8% |
| Alliant Reloder-26 | 58.5 gr | 84% | 33,243 psi | 51% | 2736 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,897 psi | 84% | 3038 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 43,990 psi | 68% | 2930 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 47,616 psi | 73% | 2900 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,817 psi | 69% | 2949 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,858 psi | 64% | 2762 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,008 psi | 74% | 2913 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 39,784 psi | 61% | 2792 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 42,670 psi | 66% | 2815 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 52,286 psi | 80% | 3018 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,227 psi | 79% | 3002 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,447 psi | 53% | 2644 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,446 psi | 81% | 3012 fps | 100% |
| Hodgdon Superformance | 57.5 gr | 80% | 38,841 psi | 60% | 2799 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 42% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,113 psi | 82% | 2976 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,979 psi | 75% | 2897 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,416 psi | 79% | 2930 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 40,059 psi | 62% | 2743 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,163 psi | 66% | 2795 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 36,376 psi | 56% | 2694 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 51,866 psi | 80% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,720 psi | 78% | 2956 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 49,792 psi | 77% | 3045 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,592 psi | 82% | 2940 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,226 psi | 76% | 2897 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,741 psi | 63% | 2743 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 39,059 psi | 60% | 2723 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 35,404 psi | 54% | 2664 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 53,621 psi | 82% | 2959 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,346 psi | 84% | 2956 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,922 psi | 77% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,426 psi | 70% | 2894 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 38,377 psi | 59% | 2835 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 37,666 psi | 58% | 2740 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 50,111 psi | 77% | 2969 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,864 psi | 77% | 3054 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 36,419 psi | 56% | 2720 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 41,466 psi | 64% | 2858 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,688 psi | 43% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,848 psi | 74% | 2894 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 54,505 psi | 84% | 3084 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,469 psi | 68% | 2946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,579 psi | 58% | 2759 fps | 97.6% |
| ReloadSwiss RS 70 | 55.2 gr | 80% | 36,463 psi | 56% | 2762 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,205 psi | 63% | 2933 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,169 psi | 79% | 2913 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,846 psi | 69% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 49,429 psi | 76% | 2940 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 43,482 psi | 67% | 2877 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 41,858 psi | 64% | 2762 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,741 psi | 63% | 2743 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 49,226 psi | 76% | 2897 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,059 psi | 60% | 2723 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,876 psi | 71% | 2897 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,301 psi | 82% | 2986 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,259 psi | 83% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,919 psi | 71% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,987 psi | 62% | 2687 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 43,076 psi | 66% | 2871 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 54,114 psi | 83% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,049 psi | 69% | 2841 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 54,389 psi | 84% | 2992 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 34,127 psi | 53% | 2694 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 41,452 psi | 64% | 2802 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 54,824 psi | 84% | 2871 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,343 psi | 79% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,634 psi | 79% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,091 psi | 66% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,131 psi | 60% | 2740 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 92% | 40,625 psi | 63% | 2772 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,937 psi | 77% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,537 psi | 59% | 2740 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 29,747 psi | 46% | 2569 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 51,039 psi | 79% | 3084 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,203 psi | 59% | 2707 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 40,001 psi | 62% | 2795 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,253 psi | 42% | 2582 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,606 psi | 82% | 2995 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,656 psi | 67% | 2841 fps | 95.2% |
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 101 powders for 6.8 Western loaded with the .277 | 130gr | Atomic 29 HP. Norma MRP delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,228 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 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 130.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for 6.8 Western with the .277 | 130gr | Atomic 29 HP 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.