Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 130gr | Swift Scirocco bullet and 87 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 55,129 psi | 86% | 3041 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 53,911 psi | 84% | 3094 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 54,781 psi | 86% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,927 psi | 88% | 3150 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,304 psi | 88% | 3251 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 54,578 psi | 86% | 3064 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,608 psi | 89% | 3196 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 54,549 psi | 85% | 3192 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,434 psi | 87% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,593 psi | 87% | 3110 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,478 psi | 89% | 3205 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,056 psi | 85% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,115 psi | 88% | 3182 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3248 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,288 psi | 85% | 3166 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,079 psi | 74% | 3097 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,563 psi | 86% | 3261 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,489 psi | 82% | 3163 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 56,318 psi | 88% | 3104 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3248 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 55,564 psi | 87% | 3091 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,586 psi | 73% | 3025 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 84% | 56,811 psi | 89% | 3127 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,288 psi | 85% | 3146 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 57,392 psi | 90% | 3159 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 54,433 psi | 85% | 3127 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,276 psi | 90% | 3173 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,898 psi | 89% | 3120 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,006 psi | 72% | 3136 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 88% | 54,259 psi | 85% | 3176 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,492 psi | 57% | 1955 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,450 psi | 90% | 3097 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,260 psi | 88% | 3081 fps | 99.5% |
| IMR 4350 | <<locked>> | 92% | 56,913 psi | 89% | 3130 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,174 psi | 90% | 3120 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 56,173 psi | 88% | 3136 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,087 psi | 89% | 3140 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,840 psi | 88% | 3117 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,666 psi | 87% | 3225 fps | 97.8% |
| Lovex S062 | <<locked>> | 84% | 57,725 psi | 90% | 3091 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,348 psi | 90% | 3117 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,463 psi | 87% | 3107 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,921 psi | 75% | 2995 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 54,955 psi | 86% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,954 psi | 85% | 3123 fps | 98.2% |
| Norma MRP | <<locked>> | 98% | 57,232 psi | 90% | 3278 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 54,389 psi | 85% | 3130 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,825 psi | 87% | 3123 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,217 psi | 88% | 3245 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 92% | 56,855 psi | 89% | 3189 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,357 psi | 79% | 3107 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 59% | 2005 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,507 psi | 89% | 3110 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,421 psi | 90% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,869 psi | 88% | 3173 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,041 psi | 85% | 3199 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,369 psi | 73% | 3136 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 82% | 56,072 psi | 88% | 3048 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,434 psi | 88% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,795 psi | 86% | 3107 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 55,390 psi | 87% | 3169 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 55,564 psi | 87% | 3091 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,348 psi | 90% | 3117 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,725 psi | 90% | 3091 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,463 psi | 87% | 3107 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,578 psi | 86% | 3110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,014 psi | 89% | 2969 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,188 psi | 90% | 3068 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,911 psi | 86% | 3163 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 56,318 psi | 88% | 3097 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,579 psi | 89% | 3094 fps | 97.1% |
| Somchem S365 | <<locked>> | 92% | 54,099 psi | 85% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,072 psi | 88% | 3140 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 82% | 56,579 psi | 89% | 3002 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,768 psi | 89% | 3018 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,041 psi | 85% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,521 psi | 89% | 3123 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 3114 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 54,998 psi | 86% | 3015 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,651 psi | 87% | 3130 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,739 psi | 89% | 3192 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,348 psi | 90% | 3268 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 3100 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,217 psi | 88% | 3084 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,288 psi | 85% | 3146 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,314 psi | 79% | 3245 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,101 psi | 88% | 3133 fps | 98.7% |
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% | 51,619 psi | 81% | 2982 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 33,388 psi | 52% | 2677 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,430 psi | 81% | 2979 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,465 psi | 62% | 2844 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 94% | 48,646 psi | 76% | 3110 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 48,211 psi | 76% | 2956 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,872 psi | 64% | 2887 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 94% | 47,427 psi | 74% | 3054 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,950 psi | 77% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,025 psi | 82% | 3051 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,174 psi | 60% | 2854 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,685 psi | 68% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,596 psi | 64% | 2881 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,901 psi | 64% | 2933 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,195 psi | 44% | 2595 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,995 psi | 50% | 2723 fps | 95.6% |
| Alliant Reloder-26 | 57.8 gr | 80% | 30,269 psi | 47% | 2713 fps | 95.7% |
| Bofors RP15 | <<locked>> | 92% | 40,350 psi | 63% | 2917 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 49,356 psi | 77% | 2992 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,901 psi | 64% | 2933 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,337 psi | 68% | 2861 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 98% | 43,671 psi | 68% | 2966 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 49,647 psi | 78% | 3009 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 41,307 psi | 65% | 2894 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 80% | 44,179 psi | 69% | 2913 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 92% | 47,587 psi | 75% | 3002 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,748 psi | 78% | 3045 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,839 psi | 56% | 2740 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,393 psi | 63% | 2999 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 40,480 psi | 63% | 2907 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 43% | 1749 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,734 psi | 80% | 2992 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,924 psi | 83% | 3025 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 38,943 psi | 61% | 2782 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,628 psi | 70% | 2890 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 37,913 psi | 59% | 2795 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 53,388 psi | 84% | 3081 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,443 psi | 77% | 2999 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 94% | 45,339 psi | 71% | 3025 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 50,995 psi | 80% | 2986 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,235 psi | 66% | 2838 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 40,524 psi | 64% | 2822 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 32,547 psi | 51% | 2654 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 51,387 psi | 81% | 3038 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,162 psi | 65% | 2871 fps | 95.2% |
| Norma MRP | 60.3 gr | 86% | 37,536 psi | 59% | 2884 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 39,247 psi | 62% | 2841 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 52,011 psi | 82% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,165 psi | 71% | 3035 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,014 psi | 60% | 2825 fps | 97.1% |
| Ramshot Magnum | <<locked>> | 92% | 37,492 psi | 59% | 2831 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 44% | 1795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,559 psi | 78% | 2989 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,398 psi | 73% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,305 psi | 62% | 2864 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,913 psi | 59% | 2871 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,478 psi | 59% | 2913 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 52,721 psi | 83% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,601 psi | 73% | 2936 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,136 psi | 71% | 2923 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 39,566 psi | 62% | 2858 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 43,337 psi | 68% | 2861 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,235 psi | 66% | 2838 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 50,995 psi | 80% | 2986 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,524 psi | 64% | 2822 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,732 psi | 75% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,398 psi | 74% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,365 psi | 65% | 2779 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,105 psi | 66% | 2920 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 46,731 psi | 73% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,414 psi | 77% | 2972 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 35,781 psi | 56% | 2795 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,695 psi | 59% | 2779 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 53,069 psi | 83% | 2953 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,388 psi | 84% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,715 psi | 70% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,480 psi | 63% | 2835 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 39,842 psi | 62% | 2822 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,517 psi | 81% | 2963 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,030 psi | 63% | 2838 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 31,270 psi | 49% | 2674 fps | 97.2% |
| Vihtavuori N560 | 64.5 gr | 92% | 46,572 psi | 73% | 3068 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 45,818 psi | 72% | 3038 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,624 psi | 62% | 2799 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 41,495 psi | 65% | 2897 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,947 psi | 39% | 2566 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,424 psi | 66% | 2884 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 87 powders for .270 Weath. Mag. loaded with the .277 | 130gr | Swift Scirocco. Norma MRP delivers the highest muzzle velocity at 3,278 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,278 fps. Alliant Reloder-22 gives the best case fill at 100 %, and 87 of the 87 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 130.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, Alliant Reloder-23, Alliant Reloder-25 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 .270 Weath. Mag. with the .277 | 130gr | Swift Scirocco 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.