Load Specifications
Load data in caliber .270 Win. with .277 | 150gr | Speer Boat-Tail bullet and 95 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-26 and Alliant Reloder-16.
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>> | 82% | 53,664 psi | 86% | 2654 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,027 psi | 88% | 2720 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,228 psi | 84% | 2759 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,041 psi | 87% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,520 psi | 87% | 2808 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,128 psi | 87% | 2733 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,651 psi | 89% | 2851 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,229 psi | 85% | 2841 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,185 psi | 85% | 2851 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,042 psi | 88% | 2759 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,100 psi | 88% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,085 psi | 88% | 2861 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,881 psi | 85% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,882 psi | 88% | 2838 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2838 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,037 psi | 79% | 2776 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,815 psi | 69% | 2700 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,333 psi | 90% | 2969 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,674 psi | 76% | 2762 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 55,854 psi | 90% | 2776 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2838 fps | 97.8% |
| Bofors RP7 | <<locked>> | 90% | 55,303 psi | 89% | 2762 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 56,217 psi | 90% | 2792 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 53,200 psi | 85% | 2805 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 53,142 psi | 85% | 2762 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 53,258 psi | 85% | 2785 fps | 95.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,898 psi | 90% | 2828 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,564 psi | 89% | 2785 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,882 psi | 86% | 2776 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,142 psi | 85% | 2838 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,781 psi | 88% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,911 psi | 86% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,405 psi | 90% | 2753 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 55,912 psi | 90% | 2789 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,548 psi | 86% | 2736 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 55,013 psi | 88% | 2802 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,098 psi | 85% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,172 psi | 88% | 2779 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,546 psi | 81% | 2808 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 55,448 psi | 89% | 2707 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,056 psi | 87% | 2717 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,490 psi | 86% | 2733 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 54,534 psi | 87% | 2772 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,265 psi | 69% | 2608 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 55,216 psi | 89% | 2723 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,057 psi | 90% | 2720 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,389 psi | 87% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,171 psi | 85% | 2789 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 54,998 psi | 88% | 2917 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 53,142 psi | 85% | 2789 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,201 psi | 89% | 2792 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,705 psi | 81% | 2822 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 55,477 psi | 89% | 2844 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,266 psi | 73% | 2700 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 59% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,188 psi | 90% | 2776 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,115 psi | 90% | 2844 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,217 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,404 psi | 87% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,968 psi | 85% | 2858 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,539 psi | 67% | 2710 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 55,767 psi | 89% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,709 psi | 89% | 2769 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,838 psi | 86% | 2766 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 53,780 psi | 86% | 2818 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 55,303 psi | 89% | 2762 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,490 psi | 86% | 2733 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,056 psi | 87% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,534 psi | 87% | 2772 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,766 psi | 86% | 2779 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,940 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,057 psi | 90% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,490 psi | 86% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,185 psi | 85% | 2687 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,301 psi | 85% | 2815 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 55,709 psi | 89% | 2651 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,767 psi | 89% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,347 psi | 89% | 2756 fps | 96.2% |
| Somchem S365 | <<locked>> | 96% | 55,811 psi | 89% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,447 psi | 87% | 2799 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 84% | 56,275 psi | 90% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,040 psi | 85% | 2654 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,505 psi | 86% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,405 psi | 89% | 2785 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,430 psi | 81% | 2720 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 54,795 psi | 88% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,462 psi | 87% | 2792 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,882 psi | 88% | 2851 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,434 psi | 89% | 2907 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,984 psi | 88% | 2756 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,476 psi | 86% | 2808 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,150 psi | 71% | 2828 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,071 psi | 88% | 2759 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2792 fps | 97.9% |
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% | 50,299 psi | 81% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,109 psi | 77% | 2608 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 34,795 psi | 56% | 2434 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,645 psi | 76% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,158 psi | 58% | 2480 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 45,150 psi | 72% | 2589 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,815 psi | 69% | 2621 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 49,574 psi | 79% | 2776 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,530 psi | 79% | 2792 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,629 psi | 73% | 2612 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,660 psi | 78% | 2677 fps | 100% |
| Alliant Reloder-16 | 43.5 gr | 80% | 35,389 psi | 57% | 2487 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,001 psi | 64% | 2612 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,438 psi | 68% | 2618 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,525 psi | 68% | 2664 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,889 psi | 42% | 2247 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,185 psi | 53% | 2470 fps | 95.4% |
| Alliant Reloder-26 | 50.5 gr | 84% | 31,662 psi | 51% | 2474 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 41,930 psi | 67% | 2651 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 45,803 psi | 73% | 2621 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,525 psi | 68% | 2664 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 40,495 psi | 65% | 2497 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,238 psi | 74% | 2631 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,232 psi | 61% | 2526 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,162 psi | 66% | 2546 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 49,922 psi | 80% | 2730 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,025 psi | 83% | 2766 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,866 psi | 53% | 2385 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,328 psi | 81% | 2723 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,842 psi | 64% | 2592 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 44% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,488 psi | 83% | 2690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,500 psi | 76% | 2618 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,617 psi | 80% | 2644 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 38,551 psi | 62% | 2480 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,901 psi | 67% | 2530 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,809 psi | 56% | 2434 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 49,893 psi | 80% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,619 psi | 83% | 2723 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 47,369 psi | 76% | 2749 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 52,170 psi | 84% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,732 psi | 77% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,305 psi | 63% | 2477 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,565 psi | 60% | 2457 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,547 psi | 54% | 2408 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 51,880 psi | 83% | 2674 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,663 psi | 84% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,993 psi | 77% | 2664 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,323 psi | 69% | 2615 fps | 95.3% |
| Norma MRP | <<locked>> | 90% | 39,073 psi | 63% | 2621 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,027 psi | 58% | 2474 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,153 psi | 77% | 2687 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,398 psi | 76% | 2762 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 35,041 psi | 56% | 2464 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 42,076 psi | 67% | 2638 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 44% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,238 psi | 74% | 2615 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,605 psi | 84% | 2792 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,554 psi | 68% | 2667 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,766 psi | 57% | 2493 fps | 97.5% |
| ReloadSwiss RS 70 | 47.6 gr | 80% | 34,954 psi | 56% | 2497 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,725 psi | 62% | 2641 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 49,530 psi | 79% | 2631 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,047 psi | 69% | 2569 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,413 psi | 76% | 2657 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 41,394 psi | 66% | 2598 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,495 psi | 65% | 2497 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,305 psi | 63% | 2477 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 47,732 psi | 77% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,565 psi | 60% | 2457 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,237 psi | 71% | 2621 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,677 psi | 83% | 2703 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,866 psi | 85% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,643 psi | 72% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,522 psi | 62% | 2425 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,002 psi | 66% | 2592 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,460 psi | 84% | 2608 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,424 psi | 70% | 2569 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 51,808 psi | 83% | 2703 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 32,619 psi | 52% | 2434 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,436 psi | 63% | 2530 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 49,748 psi | 80% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,821 psi | 80% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,466 psi | 66% | 2503 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,434 psi | 60% | 2474 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 41,307 psi | 66% | 2559 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,225 psi | 77% | 2605 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,985 psi | 59% | 2477 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,326 psi | 45% | 2323 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 48,486 psi | 78% | 2789 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,637 psi | 59% | 2448 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,232 psi | 61% | 2526 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,063 psi | 42% | 2333 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,459 psi | 83% | 2707 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,411 psi | 71% | 2625 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 103 powders for .270 Win. loaded with the .277 | 150gr | Speer Boat-Tail. Alliant Reloder-26 delivers the highest muzzle velocity at 2,969 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,969 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:11.5 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-26, Alliant Reloder-16 rank at the top here: for .270 Win. with the .277 | 150gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.