Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 130gr | Alaska Bullet Works Kodiak SP SPBC bullet and 83 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% | 56,710 psi | 89% | 3081 fps | 99.3% |
| Accurate 3100 | <<locked>> | 98% | 56,478 psi | 89% | 3143 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,623 psi | 89% | 3064 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,215 psi | 85% | 3130 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,882 psi | 86% | 3235 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 56,101 psi | 88% | 3097 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,056 psi | 86% | 3179 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 56,550 psi | 89% | 3238 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,262 psi | 62% | 2936 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,363 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,522 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,100 psi | 86% | 3192 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,478 psi | 89% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,694 psi | 86% | 3169 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,057 psi | 88% | 3232 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 3212 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,682 psi | 90% | 3310 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3212 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 54,781 psi | 86% | 3087 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,252 psi | 71% | 3061 fps | 96.3% |
| Bofors RP5 | <<locked>> | 98% | 56,057 psi | 88% | 3232 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 57,435 psi | 90% | 3133 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,776 psi | 76% | 3084 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,897 psi | 86% | 3104 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,202 psi | 88% | 3186 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 55,622 psi | 87% | 3143 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 56,869 psi | 89% | 3176 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,506 psi | 87% | 3156 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,376 psi | 87% | 3107 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,341 psi | 76% | 3199 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 88% | 56,811 psi | 89% | 3225 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 57% | 1972 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,651 psi | 87% | 3081 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,288 psi | 87% | 3114 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,419 psi | 87% | 3100 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,723 psi | 86% | 3120 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,331 psi | 85% | 3100 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 98% | 54,244 psi | 85% | 3212 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 55,941 psi | 88% | 3071 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,854 psi | 88% | 3100 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,276 psi | 90% | 3146 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,183 psi | 79% | 3041 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 56,840 psi | 89% | 3133 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,289 psi | 88% | 3173 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 55,941 psi | 88% | 3261 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 56,405 psi | 88% | 3169 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,868 psi | 86% | 3232 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 55,463 psi | 87% | 3173 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,823 psi | 83% | 3159 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 59% | 2021 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,563 psi | 86% | 3084 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,767 psi | 87% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,404 psi | 85% | 3156 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,405 psi | 88% | 3245 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,675 psi | 76% | 3196 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 54,911 psi | 86% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,724 psi | 89% | 3150 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 53,983 psi | 85% | 3153 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 57,435 psi | 90% | 3133 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,854 psi | 88% | 3100 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,941 psi | 88% | 3071 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,276 psi | 90% | 3146 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,362 psi | 88% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,390 psi | 87% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,477 psi | 87% | 3051 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,305 psi | 90% | 3212 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 54,810 psi | 86% | 3081 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,853 psi | 86% | 3077 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 56,550 psi | 89% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,636 psi | 86% | 3127 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 56,057 psi | 88% | 3048 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,795 psi | 86% | 3104 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,099 psi | 85% | 3100 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 56,710 psi | 89% | 3045 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,740 psi | 90% | 3169 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,767 psi | 87% | 3186 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,956 psi | 88% | 3251 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 3156 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,462 psi | 85% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,478 psi | 89% | 3189 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,447 psi | 84% | 3291 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,650 psi | 86% | 3120 fps | 98.6% |
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 2700 | <<locked>> | 80% | 53,243 psi | 83% | 3025 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 32,735 psi | 51% | 2664 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 53,069 psi | 83% | 3009 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,336 psi | 65% | 2890 fps | 99.3% |
| Accurate MAGPRO | 68 gr | 92% | 47,456 psi | 74% | 3094 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,559 psi | 78% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,566 psi | 62% | 2864 fps | 95% |
| ADI AR 2213 | <<locked>> | 92% | 46,209 psi | 72% | 3041 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 98% | 36,782 psi | 58% | 2867 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,647 psi | 79% | 3018 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,954 psi | 85% | 3094 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,668 psi | 62% | 2897 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,513 psi | 71% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,407 psi | 62% | 2858 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,016 psi | 63% | 2917 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,283 psi | 46% | 2631 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,241 psi | 49% | 2707 fps | 95.5% |
| Alliant Reloder-26 | 59.8 gr | 80% | 31,589 psi | 50% | 2759 fps | 96.6% |
| Bofors RP15 | <<locked>> | 90% | 39,494 psi | 62% | 2900 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,300 psi | 80% | 3031 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,235 psi | 66% | 2995 fps | 95.4% |
| Bofors RP5 | <<locked>> | 88% | 40,016 psi | 63% | 2917 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,599 psi | 70% | 2897 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 96% | 42,366 psi | 66% | 2946 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 51,459 psi | 81% | 3048 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,989 psi | 67% | 2936 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,832 psi | 72% | 2959 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 46,180 psi | 72% | 2982 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,501 psi | 76% | 3028 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,217 psi | 58% | 2776 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,653 psi | 62% | 2989 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 42,090 psi | 66% | 2953 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 43% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,156 psi | 82% | 3022 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,277 psi | 63% | 2822 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,050 psi | 72% | 2930 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 39,421 psi | 62% | 2831 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,037 psi | 75% | 2982 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 44,237 psi | 69% | 3012 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 52,475 psi | 82% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,468 psi | 68% | 2874 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 41,959 psi | 66% | 2861 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 31,952 psi | 50% | 2641 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 53,316 psi | 84% | 3077 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,929 psi | 63% | 2851 fps | 95% |
| Norma MRP | 61 gr | 84% | 36,593 psi | 57% | 2864 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,799 psi | 64% | 2881 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 43,990 psi | 69% | 3018 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 39,624 psi | 62% | 2867 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 90% | 36,593 psi | 57% | 2818 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,227 psi | 80% | 3028 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,341 psi | 76% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,988 psi | 64% | 2904 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,595 psi | 62% | 2917 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,535 psi | 57% | 2897 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 48,298 psi | 76% | 2976 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,874 psi | 69% | 2907 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 38,638 psi | 61% | 2841 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 44,599 psi | 70% | 2897 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,468 psi | 68% | 2874 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 52,475 psi | 82% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,959 psi | 66% | 2861 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,516 psi | 78% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,791 psi | 76% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,714 psi | 67% | 2818 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,031 psi | 64% | 2900 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,167 psi | 75% | 2969 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,906 psi | 75% | 2956 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 37,420 psi | 59% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,811 psi | 58% | 2766 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 46,267 psi | 73% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,192 psi | 66% | 2877 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 38,711 psi | 61% | 2802 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 53,258 psi | 83% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,626 psi | 65% | 2877 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 32,764 psi | 51% | 2720 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 90% | 45,324 psi | 71% | 3048 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 96% | 44,962 psi | 70% | 3025 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,205 psi | 65% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,192 psi | 68% | 2940 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,034 psi | 41% | 2618 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,292 psi | 65% | 2864 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 83 powders for .270 Weath. Mag. loaded with the .277 | 130gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,310 fps. ADI AR 2225 gives the best case fill at 100 %, and 83 of the 83 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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, Accurate MAGPRO, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 130gr | 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.