Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 145gr | Fox Classic Hunter bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 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% | 56,942 psi | 89% | 2930 fps | 99.7% |
| Accurate 3100 | <<locked>> | 98% | 56,086 psi | 88% | 2982 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,072 psi | 88% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,244 psi | 85% | 2972 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,926 psi | 86% | 3084 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 84% | 56,246 psi | 88% | 2940 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,405 psi | 87% | 3031 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 98% | 56,652 psi | 89% | 3087 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,990 psi | 69% | 2844 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,885 psi | 61% | 2802 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,492 psi | 87% | 3025 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,246 psi | 90% | 2959 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,363 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,172 psi | 86% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,507 psi | 89% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,723 psi | 86% | 3015 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,115 psi | 88% | 3081 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,971 psi | 89% | 3048 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,240 psi | 77% | 2995 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,566 psi | 90% | 3146 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 3061 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 54,534 psi | 85% | 2923 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,904 psi | 70% | 2917 fps | 97.2% |
| Bofors RP5 | <<locked>> | 98% | 56,115 psi | 88% | 3081 fps | 99.5% |
| Bofors RP7 | <<locked>> | 88% | 57,435 psi | 90% | 2976 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,646 psi | 76% | 2943 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 82% | 54,839 psi | 86% | 2946 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,405 psi | 88% | 3031 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 55,796 psi | 87% | 2989 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 96% | 56,811 psi | 89% | 3025 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,637 psi | 87% | 3009 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,477 psi | 87% | 2949 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,182 psi | 76% | 3051 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 88% | 56,797 psi | 89% | 3071 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1850 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,550 psi | 87% | 2917 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,158 psi | 86% | 2959 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,622 psi | 87% | 2949 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 54,723 psi | 86% | 2963 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,563 psi | 86% | 2956 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 54,244 psi | 85% | 3061 fps | 98.5% |
| Lovex S062 | <<locked>> | 82% | 55,999 psi | 88% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,753 psi | 87% | 2943 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,217 psi | 90% | 2989 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,937 psi | 78% | 2890 fps | 99.9% |
| Norma 203B | <<locked>> | 82% | 56,666 psi | 89% | 2969 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,231 psi | 88% | 3018 fps | 99.2% |
| Norma MRP | <<locked>> | 96% | 55,811 psi | 87% | 3107 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 56,449 psi | 88% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,926 psi | 86% | 3084 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 90% | 55,405 psi | 87% | 3018 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,924 psi | 83% | 3012 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,275 psi | 58% | 1893 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,694 psi | 86% | 2933 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,927 psi | 88% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,172 psi | 85% | 2995 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,507 psi | 89% | 3084 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,341 psi | 76% | 3045 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 82% | 57,696 psi | 90% | 2917 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,679 psi | 86% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,666 psi | 89% | 2995 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 96% | 57,682 psi | 90% | 3058 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 88% | 57,435 psi | 90% | 2976 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,753 psi | 87% | 2943 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,999 psi | 88% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,217 psi | 90% | 2989 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,478 psi | 89% | 2986 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,259 psi | 87% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,259 psi | 87% | 2894 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,203 psi | 90% | 3054 fps | 99.5% |
| Somchem S355 | <<locked>> | 84% | 54,549 psi | 85% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,694 psi | 86% | 2930 fps | 97.8% |
| Somchem S365 | <<locked>> | 92% | 56,608 psi | 89% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,607 psi | 86% | 2976 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 86% | 55,883 psi | 88% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,998 psi | 86% | 2953 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3005 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 82% | 56,681 psi | 89% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 53,940 psi | 85% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,666 psi | 87% | 3025 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,854 psi | 88% | 3100 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 3009 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,607 psi | 86% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,405 psi | 88% | 3031 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,737 psi | 84% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,505 psi | 85% | 2969 fps | 99.2% |
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% | 53,185 psi | 83% | 2871 fps | 99.4% |
| Accurate 3100 | <<locked>> | 80% | 29,936 psi | 47% | 2464 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 52,837 psi | 83% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,872 psi | 64% | 2740 fps | 99.7% |
| Accurate MAGPRO | 62.8 gr | 90% | 44,135 psi | 69% | 2887 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,748 psi | 78% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,898 psi | 58% | 2664 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 90% | 43,091 psi | 68% | 2835 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 41,118 psi | 64% | 2782 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 34,171 psi | 54% | 2674 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,115 psi | 58% | 2667 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,604 psi | 79% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,838 psi | 84% | 2930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,581 psi | 62% | 2753 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,585 psi | 71% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,767 psi | 58% | 2661 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,275 psi | 58% | 2717 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,066 psi | 46% | 2503 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,921 psi | 45% | 2513 fps | 95.4% |
| Alliant Reloder-26 | 56.4 gr | 80% | 31,212 psi | 49% | 2625 fps | 97.5% |
| Bofors RP15 | <<locked>> | 88% | 36,782 psi | 58% | 2703 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 51,024 psi | 80% | 2871 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 39,175 psi | 61% | 2795 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 37,275 psi | 58% | 2717 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,396 psi | 70% | 2749 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 39,465 psi | 62% | 2749 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 51,126 psi | 80% | 2887 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,004 psi | 67% | 2792 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 45,818 psi | 72% | 2812 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 43,192 psi | 68% | 2782 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,223 psi | 71% | 2825 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,188 psi | 58% | 2638 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,811 psi | 58% | 2785 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 42,032 psi | 66% | 2808 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 43% | 1654 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,359 psi | 82% | 2871 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,074 psi | 63% | 2680 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,064 psi | 72% | 2782 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 39,247 psi | 62% | 2690 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,119 psi | 66% | 2723 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 41,176 psi | 65% | 2808 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 52,518 psi | 82% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,453 psi | 68% | 2730 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 41,539 psi | 65% | 2710 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 29,298 psi | 46% | 2448 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 53,156 psi | 83% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,740 psi | 62% | 2710 fps | 96% |
| Norma MRP | 56.2 gr | 82% | 33,866 psi | 53% | 2661 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,480 psi | 63% | 2733 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 40,828 psi | 64% | 2812 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 39,407 psi | 62% | 2723 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 90% | 36,143 psi | 57% | 2684 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,833 psi | 44% | 1693 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,111 psi | 80% | 2874 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,472 psi | 76% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,828 psi | 64% | 2759 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,363 psi | 62% | 2776 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,692 psi | 53% | 2694 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 54,143 psi | 85% | 2867 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,906 psi | 75% | 2815 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,089 psi | 64% | 2710 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 35,897 psi | 56% | 2644 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 44,396 psi | 70% | 2749 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,453 psi | 68% | 2730 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 52,518 psi | 82% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,539 psi | 65% | 2710 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,414 psi | 77% | 2877 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,994 psi | 77% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,380 psi | 66% | 2674 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,116 psi | 60% | 2697 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,167 psi | 75% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,672 psi | 70% | 2753 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 37,159 psi | 58% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,098 psi | 53% | 2569 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 45,934 psi | 72% | 2736 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,989 psi | 66% | 2730 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 35,955 psi | 56% | 2608 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 52,997 psi | 83% | 2835 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,249 psi | 65% | 2730 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 32,416 psi | 51% | 2579 fps | 98.5% |
| Vihtavuori N560 | <<locked>> | 88% | 42,322 psi | 66% | 2844 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 41,742 psi | 65% | 2822 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,089 psi | 64% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,004 psi | 67% | 2792 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,512 psi | 40% | 2490 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,290 psi | 60% | 2667 fps | 95.7% |
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 86 powders for .270 Weath. Mag. loaded with the .277 | 145gr | Fox Classic Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,146 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,146 fps. ADI AR 2217 gives the best case fill at 100 %, and 86 of the 86 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 145.0 gr projectile in 0.277" calls for a 1:9.0 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. Accurate MAGPRO, Alliant Reloder-26, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 145gr | Fox Classic Hunter 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.