Load Specifications
Load data in caliber .270 Win. with .277 | 150gr | Prvi Partizan SP 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 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>> | 82% | 53,853 psi | 86% | 2654 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,897 psi | 88% | 2717 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2756 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,273 psi | 87% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,708 psi | 88% | 2808 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,331 psi | 87% | 2736 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,492 psi | 89% | 2848 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2841 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,388 psi | 86% | 2854 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,940 psi | 88% | 2759 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,274 psi | 89% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,288 psi | 89% | 2861 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,750 psi | 85% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,737 psi | 88% | 2835 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2838 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,965 psi | 79% | 2776 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,685 psi | 68% | 2697 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,188 psi | 90% | 2963 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,543 psi | 76% | 2759 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 55,709 psi | 89% | 2776 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2838 fps | 97.8% |
| Bofors RP7 | <<locked>> | 90% | 55,172 psi | 88% | 2759 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 56,420 psi | 90% | 2795 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 53,345 psi | 86% | 2805 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 53,316 psi | 85% | 2766 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 53,447 psi | 86% | 2789 fps | 95.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,028 psi | 90% | 2828 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,738 psi | 89% | 2789 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,766 psi | 86% | 2776 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,011 psi | 85% | 2835 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 58% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,665 psi | 88% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,795 psi | 86% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,953 psi | 85% | 2700 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 56,057 psi | 90% | 2792 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,432 psi | 86% | 2733 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 54,868 psi | 88% | 2799 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,301 psi | 85% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,042 psi | 88% | 2776 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,676 psi | 81% | 2808 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 55,332 psi | 89% | 2703 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,940 psi | 86% | 2713 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,679 psi | 86% | 2736 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 54,694 psi | 88% | 2772 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,381 psi | 70% | 2612 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 55,376 psi | 89% | 2723 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,941 psi | 90% | 2720 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,563 psi | 87% | 2766 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,026 psi | 85% | 2785 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2920 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 53,330 psi | 86% | 2792 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,390 psi | 89% | 2795 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,865 psi | 82% | 2822 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 55,622 psi | 89% | 2848 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,136 psi | 72% | 2697 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,970 psi | 59% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,057 psi | 90% | 2776 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,347 psi | 90% | 2848 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,086 psi | 90% | 2877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,259 psi | 87% | 2828 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,823 psi | 85% | 2854 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,655 psi | 67% | 2710 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 55,970 psi | 90% | 2726 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,898 psi | 90% | 2769 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,693 psi | 86% | 2762 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 98% | 53,969 psi | 87% | 2822 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 55,172 psi | 88% | 2759 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,679 psi | 86% | 2736 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 53,940 psi | 86% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,694 psi | 88% | 2772 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,925 psi | 86% | 2779 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,129 psi | 88% | 2756 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,217 psi | 90% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,635 psi | 86% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,316 psi | 85% | 2687 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,519 psi | 86% | 2818 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 55,927 psi | 90% | 2654 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,970 psi | 90% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,535 psi | 89% | 2759 fps | 96.3% |
| Somchem S365 | <<locked>> | 96% | 55,985 psi | 90% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,665 psi | 88% | 2799 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 84% | 56,159 psi | 90% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,258 psi | 85% | 2654 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,708 psi | 86% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,622 psi | 89% | 2792 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,285 psi | 81% | 2717 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 54,665 psi | 88% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,650 psi | 88% | 2795 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,042 psi | 88% | 2851 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,637 psi | 89% | 2910 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,158 psi | 88% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,345 psi | 86% | 2805 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,295 psi | 71% | 2828 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,201 psi | 89% | 2762 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,795 psi | 88% | 2792 fps | 98% |
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% | 50,502 psi | 81% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,269 psi | 77% | 2608 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 34,737 psi | 56% | 2434 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,819 psi | 77% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,318 psi | 58% | 2484 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 45,063 psi | 72% | 2585 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,946 psi | 69% | 2625 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 49,705 psi | 80% | 2776 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,734 psi | 80% | 2795 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,527 psi | 73% | 2612 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,834 psi | 78% | 2680 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,520 psi | 57% | 2490 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,958 psi | 64% | 2608 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,598 psi | 68% | 2621 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,670 psi | 68% | 2667 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,991 psi | 42% | 2251 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,315 psi | 53% | 2474 fps | 95.5% |
| Alliant Reloder-26 | 50.5 gr | 84% | 31,589 psi | 51% | 2470 fps | 95.7% |
| Bofors RP15 | <<locked>> | 96% | 41,814 psi | 67% | 2648 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 45,716 psi | 73% | 2621 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,670 psi | 68% | 2667 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 40,408 psi | 65% | 2493 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,166 psi | 74% | 2631 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,145 psi | 61% | 2523 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 80% | 41,075 psi | 66% | 2543 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 49,777 psi | 80% | 2726 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,214 psi | 84% | 2766 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,982 psi | 53% | 2388 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,517 psi | 81% | 2726 fps | 100% |
| Hodgdon Superformance | 50.9 gr | 82% | 39,943 psi | 64% | 2595 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 44% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,372 psi | 82% | 2690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,398 psi | 76% | 2618 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,806 psi | 80% | 2648 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 38,479 psi | 62% | 2477 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,814 psi | 67% | 2526 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,983 psi | 56% | 2438 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 50,096 psi | 80% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,750 psi | 83% | 2723 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 47,500 psi | 76% | 2753 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 52,083 psi | 84% | 2654 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,630 psi | 76% | 2615 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,436 psi | 63% | 2480 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 37,695 psi | 60% | 2461 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,663 psi | 54% | 2408 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 52,069 psi | 83% | 2677 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,547 psi | 84% | 2671 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,196 psi | 77% | 2667 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,497 psi | 70% | 2618 fps | 95.3% |
| Norma MRP | <<locked>> | 90% | 39,015 psi | 63% | 2618 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,187 psi | 58% | 2477 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,341 psi | 78% | 2687 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,253 psi | 76% | 2756 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 34,954 psi | 56% | 2461 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 42,221 psi | 68% | 2641 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 44% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,398 psi | 74% | 2618 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,489 psi | 84% | 2789 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,453 psi | 68% | 2664 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,911 psi | 58% | 2497 fps | 97.5% |
| ReloadSwiss RS 70 | 47.7 gr | 80% | 35,070 psi | 56% | 2500 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,841 psi | 62% | 2644 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 49,690 psi | 80% | 2631 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,265 psi | 69% | 2572 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,297 psi | 76% | 2657 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 41,510 psi | 67% | 2602 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,408 psi | 65% | 2493 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,436 psi | 63% | 2480 fps | 97.5% |
| Shooters World Precision | <<locked>> | 80% | 47,630 psi | 76% | 2615 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,695 psi | 60% | 2461 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,150 psi | 71% | 2618 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,576 psi | 83% | 2703 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,750 psi | 85% | 2608 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,556 psi | 71% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,667 psi | 62% | 2428 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,118 psi | 66% | 2595 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,605 psi | 84% | 2612 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,569 psi | 70% | 2572 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 51,924 psi | 83% | 2703 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 32,561 psi | 52% | 2434 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,566 psi | 63% | 2533 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 49,647 psi | 80% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,024 psi | 80% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,611 psi | 67% | 2503 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,623 psi | 60% | 2477 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 41,437 psi | 66% | 2562 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,124 psi | 77% | 2602 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,898 psi | 59% | 2474 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,456 psi | 46% | 2326 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 48,356 psi | 78% | 2785 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,782 psi | 59% | 2451 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,363 psi | 62% | 2526 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,005 psi | 42% | 2333 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,619 psi | 83% | 2710 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,541 psi | 71% | 2625 fps | 95.8% |
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 102 powders for .270 Win. loaded with the .277 | 150gr | Prvi Partizan SP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,963 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 1:12.0 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-26, Hodgdon Superformance rank at the top here: for .270 Win. with the .277 | 150gr | Prvi Partizan SP 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.