Load Specifications
Load data in caliber .270 Win. with .277 | 150gr | Alaska Bullet Works Kodiak SP SPBC bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Alliant Reloder-26.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 56,086 psi | 90% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,693 psi | 86% | 2690 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,662 psi | 81% | 2726 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 56,188 psi | 90% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,953 psi | 85% | 2776 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,506 psi | 89% | 2756 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,272 psi | 85% | 2713 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,172 psi | 87% | 2815 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2805 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,477 psi | 89% | 2877 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,809 psi | 86% | 2736 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,186 psi | 87% | 2756 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,969 psi | 87% | 2835 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,926 psi | 88% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,374 psi | 86% | 2805 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2802 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,543 psi | 76% | 2746 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,582 psi | 67% | 2664 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,418 psi | 87% | 2933 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,405 psi | 89% | 2776 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,224 psi | 74% | 2726 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 54,607 psi | 88% | 2753 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2802 fps | 97.3% |
| Bofors RP7 | <<locked>> | 90% | 53,954 psi | 87% | 2730 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 55,085 psi | 88% | 2766 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,245 psi | 89% | 2828 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 55,492 psi | 89% | 2792 fps | 98.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,463 psi | 89% | 2808 fps | 96.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2792 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,159 psi | 90% | 2766 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,099 psi | 87% | 2759 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,115 psi | 90% | 2799 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,535 psi | 89% | 2867 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,548 psi | 86% | 2717 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,115 psi | 90% | 2743 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,317 psi | 89% | 2726 fps | 99.1% |
| IMR 4350 | <<locked>> | 94% | 54,665 psi | 88% | 2762 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,564 psi | 89% | 2759 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 53,621 psi | 86% | 2772 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,564 psi | 89% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,824 psi | 86% | 2746 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 82% | 55,666 psi | 89% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,230 psi | 87% | 2680 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,260 psi | 90% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,506 psi | 89% | 2756 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,519 psi | 86% | 2746 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,018 psi | 67% | 2579 fps | 97.7% |
| Norma 201 | <<locked>> | 82% | 54,244 psi | 87% | 2700 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,723 psi | 88% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,490 psi | 86% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,477 psi | 89% | 2815 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 53,534 psi | 86% | 2887 fps | 99% |
| Norma URP | <<locked>> | 94% | 55,550 psi | 89% | 2818 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,737 psi | 86% | 2766 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,201 psi | 87% | 2818 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,874 psi | 70% | 2664 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,753 psi | 59% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,810 psi | 88% | 2749 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,781 psi | 88% | 2818 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,665 psi | 88% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,707 psi | 85% | 2799 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,288 psi | 89% | 2884 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,795 psi | 88% | 2700 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,433 psi | 87% | 2743 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,811 psi | 89% | 2785 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,173 psi | 90% | 2844 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 53,954 psi | 87% | 2730 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,506 psi | 89% | 2756 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,666 psi | 89% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,260 psi | 90% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,519 psi | 86% | 2746 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,043 psi | 90% | 2802 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,766 psi | 86% | 2726 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,027 psi | 88% | 2631 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,782 psi | 89% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,347 psi | 89% | 2710 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,680 psi | 89% | 2841 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 54,795 psi | 88% | 2631 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,376 psi | 90% | 2749 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,578 psi | 88% | 2740 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,085 psi | 87% | 2726 fps | 95.7% |
| Somchem S365 | <<locked>> | 96% | 54,259 psi | 87% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,258 psi | 85% | 2769 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 82% | 55,477 psi | 89% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,187 psi | 88% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,521 psi | 89% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,883 psi | 90% | 2717 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,041 psi | 87% | 2759 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,994 psi | 79% | 2687 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 53,388 psi | 86% | 2674 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,171 psi | 85% | 2766 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,113 psi | 85% | 2822 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 2874 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,534 psi | 86% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,622 psi | 89% | 2835 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,902 psi | 69% | 2795 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,882 psi | 86% | 2736 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2759 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 49,182 psi | 79% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,355 psi | 76% | 2585 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 33,620 psi | 54% | 2402 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 46,572 psi | 75% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,259 psi | 57% | 2451 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 80% | 52,112 psi | 84% | 2707 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,251 psi | 71% | 2562 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 44,483 psi | 71% | 2644 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 48,559 psi | 78% | 2746 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,312 psi | 77% | 2762 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,672 psi | 72% | 2589 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,674 psi | 76% | 2654 fps | 99.9% |
| Alliant Reloder-16 | 42.5 gr | 80% | 34,534 psi | 55% | 2457 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,957 psi | 62% | 2582 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,005 psi | 71% | 2641 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,208 psi | 71% | 2690 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,948 psi | 43% | 2277 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,403 psi | 55% | 2493 fps | 95.8% |
| Alliant Reloder-26 | 49.3 gr | 84% | 30,661 psi | 49% | 2438 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,721 psi | 83% | 2720 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,308 psi | 69% | 2671 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,570 psi | 71% | 2595 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,208 psi | 71% | 2690 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 39,639 psi | 64% | 2474 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,092 psi | 72% | 2605 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 37,144 psi | 60% | 2493 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 82% | 42,772 psi | 69% | 2569 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 51,895 psi | 83% | 2753 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 50,937 psi | 82% | 2736 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,707 psi | 85% | 2713 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,010 psi | 51% | 2359 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,095 psi | 79% | 2697 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,754 psi | 62% | 2559 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 43% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,241 psi | 81% | 2664 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,543 psi | 75% | 2595 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,805 psi | 78% | 2621 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 40,074 psi | 64% | 2503 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,843 psi | 65% | 2500 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 33,968 psi | 54% | 2408 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 48,907 psi | 78% | 2680 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,502 psi | 81% | 2694 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 80% | 52,185 psi | 84% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,242 psi | 82% | 2635 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,746 psi | 75% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,464 psi | 62% | 2451 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,753 psi | 59% | 2431 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 34,664 psi | 56% | 2428 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 50,879 psi | 82% | 2651 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,619 psi | 83% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,050 psi | 75% | 2641 fps | 100% |
| Norma 204 | <<locked>> | 88% | 45,252 psi | 73% | 2641 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 38,014 psi | 61% | 2589 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,172 psi | 56% | 2448 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,992 psi | 75% | 2657 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,084 psi | 55% | 2431 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 40,930 psi | 66% | 2605 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,543 psi | 44% | 1552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,165 psi | 72% | 2589 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,227 psi | 82% | 2762 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,394 psi | 66% | 2638 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,911 psi | 56% | 2467 fps | 97% |
| ReloadSwiss RS 70 | 46.5 gr | 80% | 34,084 psi | 55% | 2467 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,515 psi | 78% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,105 psi | 68% | 2546 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 49,298 psi | 79% | 2680 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 42,917 psi | 69% | 2621 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,639 psi | 64% | 2474 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,464 psi | 62% | 2451 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,185 psi | 84% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,746 psi | 75% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,753 psi | 59% | 2431 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,120 psi | 69% | 2595 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,488 psi | 81% | 2677 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,851 psi | 83% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,685 psi | 70% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,753 psi | 61% | 2398 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,511 psi | 68% | 2615 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 51,488 psi | 83% | 2589 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,620 psi | 84% | 2694 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,482 psi | 68% | 2543 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 50,836 psi | 82% | 2677 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 31,589 psi | 51% | 2405 fps | 99.2% |
| Somchem S385 | <<locked>> | 90% | 41,046 psi | 66% | 2556 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 52,344 psi | 84% | 2575 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,617 psi | 78% | 2575 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,863 psi | 78% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,553 psi | 65% | 2477 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,593 psi | 59% | 2451 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 40,176 psi | 64% | 2530 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 47,079 psi | 75% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,969 psi | 58% | 2448 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 80% | 27,456 psi | 44% | 2293 fps | 95% |
| Vihtavuori N560 | <<locked>> | 98% | 50,299 psi | 81% | 2812 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,810 psi | 57% | 2421 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,405 psi | 60% | 2500 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,266 psi | 41% | 2293 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,256 psi | 81% | 2680 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,323 psi | 69% | 2595 fps | 95.2% |
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 109 powders for .270 Win. loaded with the .277 | 150gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,933 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,933 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, 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. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. ReloadSwiss RS 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for .270 Win. 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. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.