Load Specifications
Load data in caliber .270 Win. with .277 | 140gr | Remington SP Extended-Range BT bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Hodgdon Superformance.
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% | 52,924 psi | 85% | 2730 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,636 psi | 88% | 2785 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,166 psi | 76% | 2753 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 53,301 psi | 85% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,026 psi | 85% | 2867 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 56,173 psi | 90% | 2858 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,954 psi | 87% | 2812 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,520 psi | 87% | 2904 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,940 psi | 88% | 2805 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,260 psi | 90% | 2772 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,101 psi | 90% | 2982 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,244 psi | 87% | 2835 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,679 psi | 88% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,215 psi | 87% | 2930 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,317 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 2890 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,353 psi | 71% | 2779 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,015 psi | 63% | 2680 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2959 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,130 psi | 90% | 2877 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,911 psi | 88% | 2848 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,563 psi | 87% | 2825 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,260 psi | 90% | 2785 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,607 psi | 88% | 2835 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,521 psi | 89% | 2861 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 55,767 psi | 89% | 2923 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 92% | 55,912 psi | 90% | 2884 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 82% | 53,287 psi | 85% | 2815 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,215 psi | 87% | 2854 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 52,939 psi | 85% | 2848 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,014 psi | 90% | 2959 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 58% | 1752 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,230 psi | 87% | 2815 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,650 psi | 86% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,316 psi | 85% | 2792 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,144 psi | 90% | 2825 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 55,071 psi | 88% | 2851 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,260 psi | 90% | 2854 fps | 98.6% |
| IMR 4831 | <<locked>> | 96% | 53,737 psi | 86% | 2864 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 56,057 psi | 90% | 2884 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,940 psi | 88% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,376 psi | 90% | 2831 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,114 psi | 88% | 2782 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,374 psi | 86% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,014 psi | 90% | 2848 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 53,882 psi | 86% | 2835 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,030 psi | 63% | 2598 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 54,911 psi | 88% | 2802 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,361 psi | 89% | 2799 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,911 psi | 86% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,753 psi | 89% | 2900 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 49,937 psi | 80% | 2913 fps | 97.8% |
| Norma URP | <<locked>> | 96% | 55,782 psi | 89% | 2913 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,288 psi | 87% | 2864 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,244 psi | 87% | 2907 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 55,071 psi | 88% | 2828 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,056 psi | 88% | 2844 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 59% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,651 psi | 89% | 2848 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,361 psi | 89% | 2923 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,100 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,910 psi | 85% | 2894 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,419 psi | 89% | 2976 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 55,927 psi | 90% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,477 psi | 89% | 2802 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,795 psi | 88% | 2841 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2874 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2874 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 54,563 psi | 87% | 2825 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,014 psi | 90% | 2848 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,376 psi | 90% | 2831 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,374 psi | 86% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,882 psi | 86% | 2835 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 52,866 psi | 85% | 2848 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,882 psi | 86% | 2808 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,607 psi | 88% | 2828 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,985 psi | 90% | 2736 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,359 psi | 86% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,028 psi | 90% | 2799 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2871 fps | 96.8% |
| Somchem S335 | <<locked>> | 84% | 55,579 psi | 89% | 2736 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,388 psi | 86% | 2795 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,027 psi | 88% | 2841 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,070 psi | 87% | 2910 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,359 psi | 86% | 2854 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 84% | 56,391 psi | 90% | 2720 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,419 psi | 89% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,130 psi | 90% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,391 psi | 90% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,259 psi | 87% | 2851 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 55,405 psi | 89% | 2805 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,201 psi | 87% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,650 psi | 86% | 2861 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,414 psi | 79% | 2851 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,114 psi | 87% | 2825 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,782 psi | 89% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,767 psi | 89% | 2923 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,987 psi | 64% | 2812 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,650 psi | 88% | 2838 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,154 psi | 80% | 2792 fps | 96.1% |
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% | 46,601 psi | 75% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,933 psi | 72% | 2618 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 38,334 psi | 61% | 2585 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 44,106 psi | 71% | 2638 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,779 psi | 53% | 2470 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 49,501 psi | 79% | 2753 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 42,018 psi | 67% | 2602 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 47,805 psi | 77% | 2789 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,576 psi | 83% | 2753 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,895 psi | 85% | 2730 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,730 psi | 73% | 2805 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,148 psi | 68% | 2628 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,092 psi | 72% | 2694 fps | 99.4% |
| Alliant Reloder-16 | 42.5 gr | 80% | 32,764 psi | 53% | 2487 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,535 psi | 59% | 2608 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,079 psi | 75% | 2779 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,732 psi | 46% | 2402 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,651 psi | 59% | 2621 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,967 psi | 53% | 2572 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,950 psi | 78% | 2762 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 42,163 psi | 68% | 2638 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,482 psi | 68% | 2608 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,910 psi | 85% | 2736 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,242 psi | 82% | 2785 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,844 psi | 69% | 2644 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 39,987 psi | 64% | 2635 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 46,224 psi | 74% | 2717 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 49,995 psi | 80% | 2762 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,211 psi | 48% | 2388 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,514 psi | 75% | 2743 fps | 100% |
| Hodgdon Superformance | 52 gr | 86% | 42,148 psi | 68% | 2710 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 43% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,979 psi | 77% | 2717 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,154 psi | 80% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,150 psi | 71% | 2635 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,470 psi | 75% | 2661 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 43,004 psi | 69% | 2641 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,582 psi | 67% | 2592 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,749 psi | 51% | 2431 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 46,209 psi | 74% | 2723 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 51,576 psi | 83% | 2753 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,211 psi | 79% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,878 psi | 78% | 2684 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,266 psi | 71% | 2638 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,608 psi | 59% | 2487 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 39,421 psi | 63% | 2569 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 36,651 psi | 59% | 2549 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 48,617 psi | 78% | 2703 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,979 psi | 79% | 2703 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,440 psi | 71% | 2680 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 48,834 psi | 78% | 2789 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 40,712 psi | 65% | 2726 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 32,895 psi | 53% | 2470 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 44,498 psi | 71% | 2700 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 36,666 psi | 59% | 2569 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,474 psi | 83% | 2772 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,430 psi | 82% | 2789 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 44% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,018 psi | 69% | 2628 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,109 psi | 77% | 2805 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,856 psi | 62% | 2671 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,489 psi | 52% | 2487 fps | 95.2% |
| ReloadSwiss RS 70 | 47.6 gr | 82% | 34,432 psi | 55% | 2546 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,475 psi | 84% | 2733 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,064 psi | 74% | 2651 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,566 psi | 63% | 2579 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 52,997 psi | 85% | 2825 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 96% | 45,934 psi | 74% | 2759 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 42,482 psi | 68% | 2608 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,608 psi | 59% | 2487 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,211 psi | 79% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,266 psi | 71% | 2638 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 39,421 psi | 63% | 2569 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,582 psi | 65% | 2631 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,227 psi | 81% | 2749 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,906 psi | 77% | 2723 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,400 psi | 79% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,495 psi | 67% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,712 psi | 65% | 2536 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,484 psi | 73% | 2753 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,327 psi | 79% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,792 psi | 80% | 2740 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 40,321 psi | 65% | 2585 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 29,660 psi | 48% | 2431 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 43,816 psi | 70% | 2690 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,864 psi | 80% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,948 psi | 74% | 2625 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,325 psi | 74% | 2638 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,276 psi | 61% | 2516 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,345 psi | 55% | 2477 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,909 psi | 83% | 2753 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,875 psi | 72% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,953 psi | 54% | 2480 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 31,285 psi | 50% | 2477 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,808 psi | 54% | 2451 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 52,011 psi | 83% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 39,987 psi | 64% | 2635 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,963 psi | 43% | 2415 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,790 psi | 77% | 2730 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,557 psi | 75% | 2730 fps | 95.1% |
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 116 powders for .270 Win. loaded with the .277 | 140gr | Remington SP Extended-Range BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,982 fps; across all powders the maximum-charge window runs from 1,752 fps to 2,982 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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-16, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .270 Win. with the .277 | 140gr | Remington SP Extended-Range BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.