Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:121 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:1:9.0
Load data in caliber 6.8 Western with .277 | 121gr | Peregrine Glider GRM bullet and 104 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-16 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 2015 | <<locked>> | 82% | 57,986 psi | 89% | 3041 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,392 psi | 88% | 3064 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,130 psi | 86% | 3084 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,965 psi | 75% | 3041 fps | 98.2% |
| Accurate 4064 | <<locked>> | 88% | 57,551 psi | 89% | 3120 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 58,798 psi | 90% | 3232 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 57,377 psi | 88% | 3159 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 58,566 psi | 90% | 3159 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,463 psi | 87% | 3212 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,999 psi | 86% | 3100 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 57,667 psi | 89% | 3071 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 58,030 psi | 89% | 3297 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,506 psi | 85% | 3130 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,970 psi | 86% | 3156 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,840 psi | 86% | 3235 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,682 psi | 89% | 3271 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,680 psi | 86% | 3196 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,110 psi | 76% | 3123 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,108 psi | 71% | 3068 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,219 psi | 62% | 2956 fps | 96.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,127 psi | 82% | 3271 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,740 psi | 89% | 3179 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,492 psi | 87% | 3150 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,110 psi | 76% | 3123 fps | 95.9% |
| Bofors RP7 | <<locked>> | 92% | 55,970 psi | 86% | 3120 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,334 psi | 88% | 3081 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,912 psi | 86% | 3130 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,130 psi | 88% | 3166 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 57,624 psi | 89% | 3228 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 57,537 psi | 89% | 3186 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 58,001 psi | 89% | 3169 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,217 psi | 86% | 3156 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 58,392 psi | 90% | 3205 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 58,595 psi | 90% | 3274 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 55% | 1965 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,564 psi | 85% | 3117 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 58,595 psi | 90% | 3150 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 58,059 psi | 89% | 3146 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,493 psi | 88% | 3127 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 56,913 psi | 88% | 3153 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,914 psi | 89% | 3156 fps | 98.7% |
| IMR 4831 | <<locked>> | 96% | 55,390 psi | 85% | 3163 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 57,450 psi | 88% | 3186 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,999 psi | 86% | 3100 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,609 psi | 89% | 3130 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,217 psi | 86% | 3077 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 57,928 psi | 89% | 3136 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,696 psi | 89% | 3150 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 55,245 psi | 85% | 3130 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,277 psi | 62% | 2867 fps | 96.2% |
| Norma 201 | <<locked>> | 84% | 55,753 psi | 86% | 3097 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,623 psi | 87% | 3097 fps | 100% |
| Norma 203B | <<locked>> | 88% | 58,682 psi | 90% | 3192 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,899 psi | 89% | 3209 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 52,199 psi | 80% | 3219 fps | 98.1% |
| Norma URP | <<locked>> | 96% | 57,667 psi | 89% | 3219 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 56,014 psi | 86% | 3163 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 56,362 psi | 87% | 3212 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 56,333 psi | 87% | 3127 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,376 psi | 87% | 3143 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 56% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,159 psi | 88% | 3146 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,782 psi | 87% | 3225 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,000 psi | 88% | 3261 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,868 psi | 84% | 3192 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,783 psi | 89% | 3291 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 56,376 psi | 87% | 3071 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,478 psi | 87% | 3097 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,289 psi | 87% | 3140 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 58,407 psi | 90% | 3186 fps | 96.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,650 psi | 84% | 3179 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 55,970 psi | 86% | 3120 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,696 psi | 89% | 3150 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,609 psi | 89% | 3130 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 57,928 psi | 89% | 3136 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,245 psi | 85% | 3130 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 58,407 psi | 90% | 3209 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,897 psi | 84% | 3100 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,782 psi | 86% | 3123 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,043 psi | 88% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,885 psi | 89% | 3028 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,769 psi | 89% | 3097 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,157 psi | 83% | 3176 fps | 97.1% |
| Somchem S335 | <<locked>> | 84% | 56,449 psi | 87% | 3022 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 58,769 psi | 90% | 3150 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,420 psi | 87% | 3136 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 56,594 psi | 87% | 3215 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,434 psi | 85% | 3153 fps | 98% |
| Vihtavuori N133 | <<locked>> | 84% | 57,508 psi | 88% | 3009 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,724 psi | 87% | 3058 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,450 psi | 88% | 3074 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 58,131 psi | 89% | 3114 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,304 psi | 87% | 3156 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,703 psi | 73% | 3002 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 82% | 56,608 psi | 87% | 3104 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,637 psi | 86% | 3068 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,361 psi | 85% | 3159 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,401 psi | 79% | 3150 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,217 psi | 86% | 3120 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,305 psi | 88% | 3153 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,870 psi | 89% | 3235 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,553 psi | 64% | 3104 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,028 psi | 86% | 3133 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,909 psi | 80% | 3084 fps | 96.3% |
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 2015 | <<locked>> | 80% | 54,201 psi | 83% | 2989 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,804 psi | 72% | 2907 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,861 psi | 71% | 2897 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 39,595 psi | 61% | 2851 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 44,309 psi | 68% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,170 psi | 51% | 2717 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 50,270 psi | 77% | 3041 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 42,902 psi | 66% | 2881 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 49,472 psi | 76% | 3084 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,446 psi | 81% | 3045 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,012 psi | 83% | 3022 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,891 psi | 72% | 3097 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,844 psi | 66% | 2900 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,818 psi | 70% | 2972 fps | 99.3% |
| Alliant Reloder-16 | 49.6 gr | 80% | 33,141 psi | 51% | 2740 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,362 psi | 57% | 2877 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 96% | 48,646 psi | 75% | 3071 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,803 psi | 70% | 3058 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 29,095 psi | 45% | 2638 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 37,811 psi | 58% | 2894 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,318 psi | 56% | 2904 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,183 psi | 77% | 3051 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 42,830 psi | 66% | 2910 fps | 99.7% |
| Bofors RP5 | <<locked>> | 98% | 45,803 psi | 70% | 3058 fps | 95% |
| Bofors RP7 | <<locked>> | 84% | 43,294 psi | 67% | 2881 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,012 psi | 83% | 3028 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,330 psi | 81% | 3074 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,584 psi | 67% | 2917 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 40,988 psi | 63% | 2907 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 47,442 psi | 73% | 3002 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 50,850 psi | 78% | 3051 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,589 psi | 47% | 2628 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,442 psi | 73% | 3028 fps | 100% |
| Hodgdon Superformance | 60.7 gr | 86% | 43,337 psi | 67% | 2989 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 41% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,892 psi | 75% | 3002 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 51,213 psi | 79% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,107 psi | 69% | 2920 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,282 psi | 73% | 2943 fps | 96.9% |
| IMR 4350 | <<locked>> | 88% | 43,947 psi | 68% | 2913 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,235 psi | 65% | 2858 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 32,227 psi | 50% | 2677 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 47,007 psi | 72% | 3005 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 52,446 psi | 81% | 3045 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,285 psi | 77% | 3015 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,864 psi | 77% | 2972 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,063 psi | 69% | 2917 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,840 psi | 57% | 2736 fps | 95.3% |
| Lovex S070 | <<locked>> | 84% | 40,016 psi | 62% | 2831 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 37,637 psi | 58% | 2808 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 49,037 psi | 75% | 2982 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,763 psi | 77% | 2989 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,208 psi | 70% | 2959 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 50,444 psi | 78% | 3081 fps | 95.8% |
| Norma MRP | <<locked>> | 94% | 42,105 psi | 65% | 3009 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 33,562 psi | 52% | 2726 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 45,556 psi | 70% | 2982 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 40,205 psi | 62% | 2900 fps | 96% |
| Ramshot TAC | <<locked>> | 80% | 52,576 psi | 81% | 3061 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,547 psi | 81% | 3081 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,108 psi | 42% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,743 psi | 67% | 2897 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,400 psi | 76% | 3100 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,784 psi | 61% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,170 psi | 51% | 2736 fps | 95% |
| ReloadSwiss RS 70 | 55.6 gr | 82% | 35,114 psi | 54% | 2808 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 53,040 psi | 82% | 3022 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,702 psi | 72% | 2933 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,234 psi | 62% | 2844 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 98% | 54,578 psi | 84% | 3120 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 96% | 47,732 psi | 73% | 3054 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 84% | 43,294 psi | 67% | 2881 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,840 psi | 57% | 2736 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,285 psi | 77% | 3015 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,063 psi | 69% | 2917 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 40,016 psi | 62% | 2831 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,510 psi | 64% | 2904 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,343 psi | 79% | 3041 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,950 psi | 75% | 3009 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,299 psi | 77% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,235 psi | 65% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 41,336 psi | 64% | 2799 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,282 psi | 73% | 3045 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 49,821 psi | 77% | 2920 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,024 psi | 78% | 3028 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 40,741 psi | 63% | 2848 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 30,066 psi | 46% | 2671 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 45,136 psi | 69% | 2969 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 50,850 psi | 78% | 2913 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,833 psi | 72% | 2904 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,282 psi | 73% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,972 psi | 60% | 2779 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 34,867 psi | 54% | 2726 fps | 95.9% |
| Vihtavuori N165 | <<locked>> | 98% | 44,469 psi | 68% | 2940 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 52,910 psi | 81% | 3045 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,730 psi | 70% | 2907 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,519 psi | 53% | 2730 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 31,836 psi | 49% | 2720 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,418 psi | 53% | 2700 fps | 98.1% |
| Winchester 748 | <<locked>> | 80% | 53,345 psi | 82% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 40,988 psi | 63% | 2907 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,370 psi | 45% | 2733 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,820 psi | 75% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 48,298 psi | 74% | 3018 fps | 95.4% |
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 117 powders for 6.8 Western loaded with the .277 | 121gr | Peregrine Glider GRM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,297 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 121.0 gr projectile in 0.277" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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-16, Hodgdon Superformance rank at the top here: for 6.8 Western with the .277 | 121gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.