Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Alaska Bullet Works Kodiak SP SPBC bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and IMR 7828 SSC.
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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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 53,896 psi | 84% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,361 psi | 87% | 2943 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,159 psi | 88% | 3064 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 56,536 psi | 89% | 2900 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,043 psi | 88% | 2999 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 96% | 57,653 psi | 90% | 3068 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,095 psi | 75% | 2897 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,815 psi | 67% | 2858 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,188 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,363 psi | 90% | 3012 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,724 psi | 87% | 2992 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,537 psi | 90% | 3061 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,766 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,143 psi | 86% | 3064 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,782 psi | 87% | 2966 fps | 96.5% |
| Bofors RP15 | <<locked>> | 98% | 56,405 psi | 88% | 3041 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,183 psi | 79% | 2972 fps | 98.7% |
| Bofors RP5 | <<locked>> | 96% | 57,537 psi | 90% | 3061 fps | 99.8% |
| Bofors RP7 | <<locked>> | 86% | 57,740 psi | 90% | 2940 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 2986 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 86% | 57,000 psi | 89% | 2999 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,202 psi | 88% | 2956 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 94% | 57,508 psi | 90% | 3002 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,362 psi | 88% | 2982 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,449 psi | 88% | 2917 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,924 psi | 83% | 3100 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 57,566 psi | 90% | 3038 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 58% | 1837 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,738 psi | 87% | 2927 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,825 psi | 87% | 2913 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 55,767 psi | 87% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,926 psi | 86% | 2923 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 55,158 psi | 86% | 3038 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 56,275 psi | 88% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,592 psi | 86% | 2907 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,811 psi | 89% | 2989 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 38,392 psi | 60% | 2782 fps | 97.9% |
| Norma MRP | <<locked>> | 94% | 57,450 psi | 90% | 3084 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,377 psi | 90% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,956 psi | 88% | 3061 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 56,246 psi | 88% | 2986 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,273 psi | 85% | 2992 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,753 psi | 59% | 1880 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,942 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,361 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,392 psi | 90% | 3051 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 3100 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,501 psi | 76% | 2979 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 55,637 psi | 87% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,392 psi | 90% | 2969 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 55,143 psi | 86% | 2979 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 57,740 psi | 90% | 2940 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,275 psi | 88% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,592 psi | 86% | 2907 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,058 psi | 89% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,579 psi | 87% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,564 psi | 87% | 2861 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,694 psi | 86% | 2972 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 55,317 psi | 87% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,332 psi | 87% | 2904 fps | 98.3% |
| Somchem S365 | <<locked>> | 88% | 54,041 psi | 85% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,521 psi | 87% | 2946 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,405 psi | 88% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,637 psi | 87% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,230 psi | 87% | 2930 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 54,882 psi | 86% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,319 psi | 90% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,261 psi | 90% | 3081 fps | 98.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,855 psi | 89% | 3054 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,821 psi | 78% | 2989 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,969 psi | 86% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,276 psi | 90% | 3002 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,304 psi | 88% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,622 psi | 87% | 2946 fps | 99.6% |
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 3100 | <<locked>> | 80% | 33,591 psi | 53% | 2520 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 45,049 psi | 71% | 2776 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 42,438 psi | 67% | 2808 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 52,968 psi | 83% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,579 psi | 59% | 2648 fps | 96% |
| ADI AR 2213 | <<locked>> | 86% | 41,031 psi | 64% | 2756 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 94% | 39,465 psi | 62% | 2713 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 90% | 31,053 psi | 49% | 2549 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,163 psi | 68% | 2782 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,893 psi | 78% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,608 psi | 59% | 2644 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,897 psi | 56% | 2644 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,314 psi | 51% | 2552 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,123 psi | 44% | 2454 fps | 95.8% |
| Alliant Reloder-26 | 58.2 gr | 80% | 35,172 psi | 55% | 2687 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,518 psi | 82% | 2907 fps | 95.8% |
| Bofors RP15 | <<locked>> | 84% | 35,607 psi | 56% | 2635 fps | 95.4% |
| Bofors RP30 | <<locked>> | 92% | 38,247 psi | 60% | 2733 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 35,897 psi | 56% | 2644 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 47,848 psi | 75% | 2779 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 37,797 psi | 59% | 2677 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 46,644 psi | 73% | 2825 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 49,298 psi | 77% | 2838 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 40,944 psi | 64% | 2700 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,033 psi | 67% | 2743 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,857 psi | 64% | 2664 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,388 psi | 52% | 2651 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 46,180 psi | 72% | 2848 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 43% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,323 psi | 68% | 2710 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,269 psi | 77% | 2805 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 42,989 psi | 67% | 2723 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,161 psi | 63% | 2648 fps | 95% |
| IMR 7828 SSC | 58.4 gr | 86% | 39,392 psi | 62% | 2730 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,949 psi | 74% | 2756 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,092 psi | 71% | 2743 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,008 psi | 45% | 2398 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 43,323 psi | 68% | 2749 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 31,531 psi | 49% | 2598 fps | 95% |
| Norma MRP | <<locked>> | 80% | 34,998 psi | 55% | 2651 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 44,179 psi | 69% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,059 psi | 61% | 2736 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 43,105 psi | 68% | 2759 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 32,460 psi | 51% | 2552 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,369 psi | 44% | 1683 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,040 psi | 83% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,976 psi | 70% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,294 psi | 68% | 2815 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,474 psi | 51% | 2625 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 41,843 psi | 66% | 2844 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 51,996 psi | 81% | 2835 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,102 psi | 61% | 2631 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 36,927 psi | 58% | 2628 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 80% | 47,848 psi | 75% | 2779 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,949 psi | 74% | 2756 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,092 psi | 71% | 2743 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,417 psi | 84% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,199 psi | 82% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,948 psi | 72% | 2703 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,608 psi | 57% | 2621 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 52,040 psi | 82% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,409 psi | 66% | 2674 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 41,162 psi | 65% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,536 psi | 59% | 2612 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 80% | 49,588 psi | 78% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,629 psi | 72% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,751 psi | 54% | 2539 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 45,063 psi | 71% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,274 psi | 57% | 2628 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 40,451 psi | 63% | 2766 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 90% | 40,582 psi | 64% | 2756 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 98% | 46,470 psi | 73% | 2923 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,817 psi | 70% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,862 psi | 73% | 2828 fps | 99.4% |
| Winchester StaBALL HD | 55.9 gr | 80% | 28,645 psi | 45% | 2566 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,767 psi | 58% | 2595 fps | 95.9% |
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 76 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Alaska Bullet Works Kodiak SP SPBC. Winchester StaBALL HD delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,114 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | Alaska Bullet Works Kodiak SP SPBC 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.