Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 129gr | Barnes LRX BT bullet and 94 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 ReloadSwiss RS 70.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 55,448 psi | 87% | 3002 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,014 psi | 89% | 3087 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 3133 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 55,970 psi | 88% | 3064 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,305 psi | 90% | 3186 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,099 psi | 85% | 3225 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 86% | 56,246 psi | 88% | 3104 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,984 psi | 86% | 3182 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 3235 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,927 psi | 88% | 3238 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,203 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,392 psi | 90% | 3153 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,520 psi | 85% | 3192 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,854 psi | 88% | 3215 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,201 psi | 85% | 3163 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,288 psi | 87% | 3228 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,141 psi | 82% | 3146 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,179 psi | 71% | 3071 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,623 psi | 89% | 3304 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,691 psi | 79% | 3146 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 54,346 psi | 85% | 3087 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,288 psi | 87% | 3228 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 57,435 psi | 90% | 3136 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 84% | 54,766 psi | 86% | 3107 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,028 psi | 88% | 3189 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 55,579 psi | 87% | 3143 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 98% | 56,536 psi | 89% | 3173 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,376 psi | 87% | 3153 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,810 psi | 86% | 3107 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,246 psi | 88% | 3146 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,150 psi | 69% | 3107 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 90% | 56,420 psi | 88% | 3225 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1959 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,811 psi | 89% | 3110 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,898 psi | 88% | 3087 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,839 psi | 86% | 3068 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,114 psi | 86% | 3114 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,753 psi | 87% | 3110 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 54,041 psi | 85% | 3117 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,317 psi | 87% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,404 psi | 85% | 3100 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,737 psi | 84% | 3205 fps | 97.3% |
| Lovex S060 | <<locked>> | 82% | 57,261 psi | 90% | 3071 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,941 psi | 88% | 3077 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,637 psi | 87% | 3100 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 57,159 psi | 90% | 3150 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,818 psi | 72% | 2969 fps | 98.9% |
| Norma 201 | <<locked>> | 82% | 57,130 psi | 90% | 3087 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,681 psi | 89% | 3140 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,883 psi | 88% | 3169 fps | 98.4% |
| Norma MRP | <<locked>> | 98% | 55,042 psi | 86% | 3258 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 56,130 psi | 88% | 3169 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,882 psi | 84% | 3107 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,128 psi | 85% | 3222 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 54,853 psi | 86% | 3169 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,327 psi | 76% | 3081 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,883 psi | 58% | 2005 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,911 psi | 86% | 3094 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,288 psi | 87% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,580 psi | 90% | 3215 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,956 psi | 88% | 3241 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,440 psi | 70% | 3104 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 54,273 psi | 85% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,476 psi | 85% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,521 psi | 89% | 3146 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 98% | 57,029 psi | 89% | 3209 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 90% | 57,435 psi | 90% | 3136 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,637 psi | 87% | 3100 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 55,941 psi | 88% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,159 psi | 90% | 3150 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,347 psi | 88% | 3153 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,000 psi | 89% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,506 psi | 87% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,259 psi | 87% | 3051 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,550 psi | 89% | 3202 fps | 98.8% |
| Somchem S335 | <<locked>> | 82% | 57,595 psi | 90% | 3005 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 54,534 psi | 85% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,737 psi | 86% | 3077 fps | 96.6% |
| Somchem S365 | <<locked>> | 94% | 55,477 psi | 87% | 3169 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,012 psi | 85% | 3120 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 54,766 psi | 86% | 2992 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,143 psi | 86% | 3012 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,811 psi | 87% | 3051 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,520 psi | 85% | 3107 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,505 psi | 84% | 3097 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 84% | 56,797 psi | 89% | 3058 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,377 psi | 90% | 3169 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,607 psi | 86% | 3179 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,245 psi | 87% | 3245 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,360 psi | 85% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,028 psi | 88% | 3189 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,776 psi | 75% | 3219 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,334 psi | 90% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,143 psi | 85% | 3114 fps | 98.3% |
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 2495 | <<locked>> | 80% | 51,866 psi | 81% | 2953 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,835 psi | 78% | 2966 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 33,750 psi | 53% | 2700 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 49,211 psi | 77% | 2959 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,478 psi | 59% | 2815 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 96% | 50,328 psi | 79% | 3156 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 46,775 psi | 73% | 2943 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,829 psi | 66% | 2920 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 45,919 psi | 72% | 3038 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,040 psi | 82% | 3173 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,268 psi | 74% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,343 psi | 79% | 3038 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,637 psi | 57% | 2831 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,785 psi | 65% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,698 psi | 65% | 2917 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,959 psi | 66% | 2969 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,716 psi | 42% | 2559 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,547 psi | 51% | 2753 fps | 95.7% |
| Alliant Reloder-26 | 58.9 gr | 82% | 30,792 psi | 48% | 2743 fps | 95.8% |
| Bofors RP15 | <<locked>> | 94% | 41,379 psi | 65% | 2956 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 47,427 psi | 74% | 2976 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,959 psi | 66% | 2969 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,568 psi | 65% | 2835 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 47,892 psi | 75% | 2989 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 39,697 psi | 62% | 2871 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 42,699 psi | 67% | 2897 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 49,226 psi | 77% | 3048 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,196 psi | 76% | 3028 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,229 psi | 54% | 2717 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,489 psi | 82% | 3087 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,379 psi | 65% | 3035 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 38,711 psi | 61% | 2877 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1752 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,330 psi | 84% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,197 psi | 77% | 2979 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,271 psi | 80% | 3009 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,318 psi | 58% | 2756 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,236 psi | 68% | 2874 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 36,201 psi | 57% | 2769 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 51,648 psi | 81% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,761 psi | 75% | 2979 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 46,775 psi | 73% | 3068 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,824 psi | 84% | 3018 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,269 psi | 77% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,625 psi | 64% | 2818 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 38,682 psi | 61% | 2792 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 32,692 psi | 51% | 2674 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 53,635 psi | 84% | 3035 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,690 psi | 78% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,351 psi | 66% | 2910 fps | 95.4% |
| Norma MRP | 59.9 gr | 86% | 35,665 psi | 56% | 2848 fps | 95% |
| Norma URP | <<locked>> | 80% | 37,376 psi | 59% | 2812 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,328 psi | 79% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,615 psi | 73% | 3077 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 36,448 psi | 57% | 2799 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 38,624 psi | 61% | 2874 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,008 psi | 75% | 2972 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,440 psi | 70% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,521 psi | 59% | 2838 fps | 98.2% |
| ReloadSwiss RS 70 | 56.9 gr | 80% | 36,405 psi | 57% | 2844 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,334 psi | 60% | 2949 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 50,908 psi | 80% | 2982 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,498 psi | 70% | 2913 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,572 psi | 73% | 2966 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 40,611 psi | 64% | 2894 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,568 psi | 65% | 2835 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,625 psi | 64% | 2818 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 49,269 psi | 77% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,682 psi | 61% | 2792 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,079 psi | 72% | 2979 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,621 psi | 84% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,905 psi | 72% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,595 psi | 62% | 2756 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,234 psi | 63% | 2890 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 54,172 psi | 85% | 2959 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,991 psi | 71% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,937 psi | 80% | 3012 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 33,837 psi | 53% | 2762 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 38,638 psi | 61% | 2818 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 51,256 psi | 80% | 2943 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,488 psi | 81% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,830 psi | 67% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,870 psi | 61% | 2812 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 38,014 psi | 60% | 2792 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,893 psi | 78% | 2953 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,348 psi | 60% | 2815 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 29,472 psi | 46% | 2641 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 94% | 47,935 psi | 75% | 3107 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,159 psi | 60% | 2782 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 39,900 psi | 63% | 2874 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,048 psi | 39% | 2582 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,577 psi | 84% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,828 psi | 64% | 2861 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 94 powders for .270 Weath. Mag. loaded with the .277 | 129gr | Barnes LRX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,304 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 129.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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, ReloadSwiss RS 70 rank at the top here: for .270 Weath. Mag. with the .277 | 129gr | Barnes LRX BT 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.