Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 130gr | Woodleigh PP SN bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate MAGPRO and Norma MRP.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 57,217 psi | 90% | 3091 fps | 99.4% |
| Accurate 3100 | <<locked>> | 98% | 56,913 psi | 89% | 3150 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,942 psi | 89% | 3068 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,795 psi | 86% | 3140 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,550 psi | 87% | 3248 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 56,637 psi | 89% | 3107 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,782 psi | 87% | 3192 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 98% | 57,246 psi | 90% | 3255 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,523 psi | 62% | 2946 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,624 psi | 90% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,608 psi | 87% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,043 psi | 89% | 3222 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,114 psi | 86% | 3176 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,811 psi | 89% | 3248 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3215 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3156 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,172 psi | 85% | 3255 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,666 psi | 87% | 3228 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 55,100 psi | 86% | 3094 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,614 psi | 71% | 3071 fps | 96.5% |
| Bofors RP5 | <<locked>> | 98% | 56,811 psi | 89% | 3248 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 54,360 psi | 85% | 3084 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,110 psi | 77% | 3094 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 55,172 psi | 86% | 3110 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,695 psi | 89% | 3196 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 56,130 psi | 88% | 3153 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 96% | 57,276 psi | 90% | 3186 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,912 psi | 88% | 3163 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,912 psi | 88% | 3117 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,718 psi | 76% | 3209 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 88% | 57,305 psi | 90% | 3235 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 57% | 1975 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,956 psi | 88% | 3087 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,724 psi | 87% | 3123 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,883 psi | 88% | 3114 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 55,201 psi | 87% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,969 psi | 86% | 3114 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 98% | 54,650 psi | 86% | 3222 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 56,246 psi | 88% | 3077 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,362 psi | 88% | 3110 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,230 psi | 85% | 3097 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,676 psi | 79% | 3048 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,130 psi | 90% | 3140 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,724 psi | 89% | 3182 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 56,420 psi | 88% | 3271 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 56,898 psi | 89% | 3176 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,317 psi | 87% | 3241 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 55,956 psi | 88% | 3182 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,432 psi | 84% | 3169 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 59% | 2024 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,027 psi | 86% | 3097 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,347 psi | 88% | 3209 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,897 psi | 86% | 3163 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,913 psi | 89% | 3251 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 3209 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 55,463 psi | 87% | 3094 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,145 psi | 90% | 3159 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 54,491 psi | 85% | 3163 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 54,360 psi | 85% | 3084 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,362 psi | 88% | 3110 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,246 psi | 88% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,230 psi | 85% | 3097 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,840 psi | 89% | 3153 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,666 psi | 87% | 2963 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,637 psi | 87% | 3054 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,740 psi | 90% | 3222 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 55,085 psi | 86% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,201 psi | 87% | 3087 fps | 97.2% |
| Somchem S365 | <<locked>> | 92% | 57,101 psi | 89% | 3182 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,056 psi | 86% | 3136 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 56,289 psi | 88% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,274 psi | 87% | 3114 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,520 psi | 85% | 3110 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 56,971 psi | 89% | 3051 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,404 psi | 85% | 3117 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,260 psi | 88% | 3192 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,362 psi | 88% | 3261 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3166 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,926 psi | 86% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,971 psi | 89% | 3199 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,288 psi | 85% | 3301 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,303 psi | 87% | 3133 fps | 98.8% |
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 2700 | <<locked>> | 80% | 53,476 psi | 84% | 3031 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 32,982 psi | 52% | 2671 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 53,621 psi | 84% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,611 psi | 65% | 2897 fps | 99.4% |
| Accurate MAGPRO | 68.6 gr | 92% | 48,109 psi | 75% | 3107 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 49,835 psi | 78% | 2995 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,958 psi | 63% | 2877 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 46,586 psi | 73% | 3051 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 96% | 34,795 psi | 55% | 2812 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,937 psi | 80% | 3025 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,929 psi | 63% | 2904 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,832 psi | 72% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,798 psi | 62% | 2867 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,408 psi | 63% | 2927 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,646 psi | 46% | 2644 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,560 psi | 49% | 2717 fps | 95.7% |
| Alliant Reloder-26 | 60.3 gr | 80% | 31,981 psi | 50% | 2772 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 39,914 psi | 63% | 2913 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 51,576 psi | 81% | 3038 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,598 psi | 67% | 3005 fps | 95.6% |
| Bofors RP5 | <<locked>> | 88% | 40,408 psi | 63% | 2927 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 45,063 psi | 71% | 2907 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 42,902 psi | 67% | 2959 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 51,721 psi | 81% | 3054 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,482 psi | 68% | 2949 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 46,108 psi | 72% | 2966 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 46,586 psi | 73% | 2992 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,907 psi | 77% | 3041 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,695 psi | 59% | 2785 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,987 psi | 63% | 2999 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 42,554 psi | 67% | 2963 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 43% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,446 psi | 82% | 3028 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,538 psi | 64% | 2828 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,267 psi | 73% | 2936 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 39,697 psi | 62% | 2841 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,440 psi | 71% | 2933 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 92% | 44,628 psi | 70% | 3022 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 53,026 psi | 83% | 3028 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,947 psi | 69% | 2884 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 42,221 psi | 66% | 2867 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 32,198 psi | 50% | 2648 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 53,606 psi | 84% | 3084 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,161 psi | 63% | 2858 fps | 95.1% |
| Norma MRP | 61.5 gr | 84% | 36,970 psi | 58% | 2874 fps | 96% |
| Norma URP | <<locked>> | 80% | 41,104 psi | 64% | 2887 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 44,585 psi | 70% | 3035 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 39,842 psi | 62% | 2874 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 90% | 36,912 psi | 58% | 2828 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,692 psi | 81% | 3038 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,646 psi | 76% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,495 psi | 65% | 2917 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,001 psi | 63% | 2930 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,811 psi | 58% | 2907 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 48,617 psi | 76% | 2982 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,280 psi | 69% | 2920 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 84% | 39,102 psi | 61% | 2854 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 45,063 psi | 71% | 2907 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,947 psi | 69% | 2884 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 53,026 psi | 83% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,221 psi | 66% | 2867 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,792 psi | 78% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,095 psi | 77% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,917 psi | 67% | 2822 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,754 psi | 61% | 2848 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 48,660 psi | 76% | 2979 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,298 psi | 76% | 2963 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 37,739 psi | 59% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,057 psi | 58% | 2772 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 46,528 psi | 73% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,453 psi | 67% | 2884 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 39,117 psi | 61% | 2812 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 53,519 psi | 84% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,901 psi | 66% | 2884 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 33,083 psi | 52% | 2726 fps | 98% |
| Vihtavuori N560 | <<locked>> | 90% | 45,934 psi | 72% | 3064 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 96% | 45,339 psi | 71% | 3031 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,626 psi | 65% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,482 psi | 68% | 2949 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,208 psi | 41% | 2625 fps | 97.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,943 psi | 61% | 2815 fps | 95% |
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 88 powders for .270 Weath. Mag. loaded with the .277 | 130gr | Woodleigh PP SN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,301 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.277" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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, Accurate MAGPRO, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 130gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Norma 217, ReloadSwiss RS 80 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.