Load Specifications
Load data in caliber .30 Fl. N.E. Purdey with .308 | 150gr | Berger Target FB bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Accurate 4064.
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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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 40,379 psi | 87% | 2562 fps | 100% |
| Accurate 2015 | <<locked>> | 86% | 39,639 psi | 85% | 2543 fps | 99.9% |
| Accurate 2460 | <<locked>> | 84% | 41,104 psi | 89% | 2605 fps | 98.8% |
| Accurate 2460 | <<locked>> | 84% | 40,147 psi | 87% | 2579 fps | 98.5% |
| Accurate 2495 | <<locked>> | 94% | 41,220 psi | 89% | 2648 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 40,161 psi | 87% | 2621 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 41,466 psi | 89% | 2651 fps | 98.6% |
| Accurate 2520 | <<locked>> | 88% | 40,538 psi | 87% | 2628 fps | 98.3% |
| Accurate 4064 | <<locked>> | 96% | 41,089 psi | 89% | 2671 fps | 99.3% |
| Accurate 4064 | <<locked>> | 96% | 40,147 psi | 87% | 2644 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 88% | 41,887 psi | 90% | 2621 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 88% | 41,002 psi | 88% | 2592 fps | 96.6% |
| Alliant AR-Comp | <<locked>> | 88% | 39,769 psi | 86% | 2635 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 41,408 psi | 89% | 2654 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 41,031 psi | 88% | 2674 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 40,901 psi | 88% | 2657 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 40,074 psi | 86% | 2631 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 82% | 40,625 psi | 88% | 2579 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 40,089 psi | 86% | 2559 fps | 100% |
| Bofors RP3 | <<locked>> | 96% | 40,335 psi | 87% | 2661 fps | 96.5% |
| Bofors RP3 | <<locked>> | 96% | 39,479 psi | 85% | 2635 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 41,974 psi | 90% | 2575 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 41,089 psi | 89% | 2549 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 88% | 39,262 psi | 85% | 2631 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 90% | 40,959 psi | 88% | 2654 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 84% | 41,916 psi | 90% | 2641 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 41,176 psi | 89% | 2618 fps | 99.5% |
| Hodgdon H335 | <<locked>> | 82% | 39,784 psi | 86% | 2605 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 84% | 41,713 psi | 90% | 2631 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 90% | 41,321 psi | 89% | 2635 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 40,408 psi | 87% | 2674 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,228 psi | 72% | 1667 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,388 psi | 72% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 41,147 psi | 89% | 2621 fps | 95.9% |
| IMR 3031 | <<locked>> | 90% | 40,306 psi | 87% | 2671 fps | 99.8% |
| IMR 3031 | <<locked>> | 92% | 41,974 psi | 90% | 2694 fps | 99.9% |
| IMR 4198 | <<locked>> | 82% | 41,452 psi | 89% | 2539 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 41,887 psi | 90% | 2621 fps | 97% |
| IMR 8208 XBR | <<locked>> | 88% | 41,002 psi | 88% | 2592 fps | 96.6% |
| Lovex D073.5 | <<locked>> | 84% | 41,017 psi | 88% | 2605 fps | 97.7% |
| Lovex D073.5 | <<locked>> | 84% | 40,059 psi | 86% | 2579 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 90% | 39,436 psi | 85% | 2625 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 92% | 41,408 psi | 89% | 2657 fps | 98.5% |
| Lovex S062 | <<locked>> | 94% | 41,611 psi | 90% | 2635 fps | 97.1% |
| Lovex S062 | <<locked>> | 94% | 40,712 psi | 88% | 2608 fps | 96.7% |
| Norma 201 | <<locked>> | 90% | 41,089 psi | 89% | 2605 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 40,147 psi | 87% | 2579 fps | 96.5% |
| Norma 202 | <<locked>> | 90% | 40,886 psi | 88% | 2625 fps | 99% |
| Norma 202 | <<locked>> | 90% | 40,248 psi | 87% | 2605 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,315 psi | 72% | 1706 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,170 psi | 71% | 1696 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 41,611 psi | 90% | 2615 fps | 98.2% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 40,973 psi | 88% | 2592 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 41,640 psi | 90% | 2743 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 40,814 psi | 88% | 2710 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 86% | 39,972 psi | 86% | 2569 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 88% | 41,771 psi | 90% | 2595 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 92% | 41,307 psi | 89% | 2602 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 92% | 40,451 psi | 87% | 2575 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 98% | 40,263 psi | 87% | 2648 fps | 96.1% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,771 psi | 90% | 2667 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 39,436 psi | 85% | 2625 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 41,408 psi | 89% | 2657 fps | 98.5% |
| Shooters World Precision | <<locked>> | 94% | 41,611 psi | 90% | 2635 fps | 97.1% |
| Shooters World Precision | <<locked>> | 94% | 40,712 psi | 88% | 2608 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 41,582 psi | 90% | 2572 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 40,654 psi | 88% | 2546 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 41,321 psi | 89% | 2589 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 40,422 psi | 87% | 2562 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 41,031 psi | 88% | 2536 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 40,350 psi | 87% | 2516 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 39,958 psi | 86% | 2533 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 41,756 psi | 90% | 2556 fps | 99.5% |
| Somchem S321 | <<locked>> | 84% | 39,392 psi | 85% | 2595 fps | 96.7% |
| Somchem S321 | <<locked>> | 86% | 41,365 psi | 89% | 2625 fps | 97.1% |
| Somchem S335 | <<locked>> | 88% | 40,016 psi | 86% | 2539 fps | 99.3% |
| Somchem S335 | <<locked>> | 90% | 41,655 psi | 90% | 2559 fps | 99.4% |
| Somchem S355 | <<locked>> | 98% | 41,684 psi | 90% | 2657 fps | 96.2% |
| Somchem S355 | <<locked>> | 98% | 40,553 psi | 87% | 2628 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 84% | 41,278 psi | 89% | 2536 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 40,495 psi | 87% | 2513 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 40,727 psi | 88% | 2543 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 88% | 40,016 psi | 86% | 2520 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 94% | 41,989 psi | 90% | 2644 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 40,973 psi | 88% | 2621 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 41,379 psi | 89% | 2612 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 92% | 40,466 psi | 87% | 2585 fps | 99% |
| Vihtavuori N150 | <<locked>> | 98% | 40,103 psi | 86% | 2598 fps | 97.2% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,713 psi | 90% | 2621 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 88% | 41,858 psi | 90% | 2615 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 88% | 40,930 psi | 88% | 2589 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 92% | 39,653 psi | 85% | 2595 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 94% | 41,394 psi | 89% | 2621 fps | 98.8% |
| Winchester 748 | <<locked>> | 88% | 40,364 psi | 87% | 2654 fps | 97.6% |
| Winchester 748 | <<locked>> | 88% | 39,537 psi | 85% | 2628 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 92% | 41,205 psi | 89% | 2641 fps | 95.9% |
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 2015 | <<locked>> | 80% | 33,533 psi | 72% | 2425 fps | 99.3% |
| Accurate 2015 | <<locked>> | 80% | 32,750 psi | 71% | 2402 fps | 99.1% |
| Accurate 2460 | <<locked>> | 80% | 35,955 psi | 77% | 2500 fps | 97.7% |
| Accurate 2460 | <<locked>> | 80% | 35,012 psi | 75% | 2474 fps | 97.3% |
| Accurate 2495 | <<locked>> | 80% | 25,802 psi | 56% | 2303 fps | 97.7% |
| Accurate 2495 | <<locked>> | 80% | 25,280 psi | 54% | 2283 fps | 97.4% |
| Accurate 2520 | <<locked>> | 80% | 31,328 psi | 68% | 2434 fps | 95.8% |
| Accurate 2520 | <<locked>> | 80% | 30,647 psi | 66% | 2411 fps | 95.4% |
| Accurate 4064 | 35.8 gr | 82% | 26,121 psi | 56% | 2323 fps | 95% |
| Accurate 4064 | 36.7 gr | 84% | 27,224 psi | 59% | 2346 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 37,057 psi | 80% | 2520 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 36,158 psi | 78% | 2490 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 30,690 psi | 66% | 2444 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 30,037 psi | 65% | 2421 fps | 99.9% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 38,421 psi | 83% | 2621 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 36,056 psi | 78% | 2556 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,594 psi | 81% | 2579 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,319 psi | 83% | 2533 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,478 psi | 81% | 2510 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 37,768 psi | 81% | 2608 fps | 95.7% |
| Bofors RP3 | <<locked>> | 94% | 36,927 psi | 80% | 2582 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,983 psi | 75% | 2428 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,360 psi | 74% | 2405 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 84% | 34,360 psi | 74% | 2523 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 84% | 33,533 psi | 72% | 2497 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 80% | 36,782 psi | 79% | 2539 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 36,042 psi | 78% | 2513 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 80% | 37,115 psi | 80% | 2549 fps | 98.2% |
| Hodgdon H335 | <<locked>> | 80% | 36,463 psi | 79% | 2526 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 88% | 38,841 psi | 84% | 2585 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 37,797 psi | 81% | 2615 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,729 psi | 53% | 1493 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,453 psi | 53% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 38,696 psi | 83% | 2569 fps | 95.2% |
| IMR 3031 | 34.5 gr | 80% | 29,240 psi | 63% | 2418 fps | 97.7% |
| IMR 3031 | 34.5 gr | 80% | 28,587 psi | 62% | 2388 fps | 97.3% |
| IMR 4198 | <<locked>> | 80% | 39,059 psi | 84% | 2497 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 37,057 psi | 80% | 2520 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 84% | 36,158 psi | 78% | 2490 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 80% | 35,650 psi | 77% | 2497 fps | 96.3% |
| Lovex D073.5 | <<locked>> | 80% | 34,998 psi | 75% | 2474 fps | 96% |
| Lovex D073.6 | <<locked>> | 82% | 30,110 psi | 65% | 2418 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 84% | 31,517 psi | 68% | 2448 fps | 95.7% |
| Lovex S062 | <<locked>> | 90% | 36,695 psi | 79% | 2533 fps | 95.7% |
| Lovex S062 | <<locked>> | 90% | 35,781 psi | 77% | 2503 fps | 95.2% |
| Norma 201 | <<locked>> | 86% | 36,260 psi | 78% | 2507 fps | 95.5% |
| Norma 201 | <<locked>> | 86% | 35,578 psi | 77% | 2480 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 29,718 psi | 64% | 2375 fps | 95.9% |
| Norma 202 | <<locked>> | 80% | 29,254 psi | 63% | 2356 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,671 psi | 53% | 1526 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,671 psi | 53% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,724 psi | 79% | 2516 fps | 97.1% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,781 psi | 77% | 2487 fps | 96.7% |
| ReloadSwiss RS 60 | 44.1 gr | 92% | 34,534 psi | 74% | 2569 fps | 95.5% |
| ReloadSwiss RS 60 | 44.1 gr | 94% | 36,071 psi | 78% | 2598 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 33,431 psi | 72% | 2425 fps | 96.9% |
| Rottweil R 901 | <<locked>> | 80% | 32,953 psi | 71% | 2405 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 88% | 36,506 psi | 79% | 2503 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 88% | 35,839 psi | 77% | 2480 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 96% | 37,681 psi | 81% | 2595 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 98% | 39,117 psi | 84% | 2618 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 30,110 psi | 65% | 2418 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,517 psi | 68% | 2448 fps | 95.7% |
| Shooters World Precision | <<locked>> | 90% | 36,695 psi | 79% | 2533 fps | 95.7% |
| Shooters World Precision | <<locked>> | 90% | 35,781 psi | 77% | 2503 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,740 psi | 83% | 2516 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,087 psi | 82% | 2493 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,943 psi | 84% | 2543 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,087 psi | 82% | 2516 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,155 psi | 69% | 2349 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,473 psi | 68% | 2326 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,049 psi | 56% | 2211 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 26,977 psi | 58% | 2231 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 34,345 psi | 74% | 2487 fps | 95.1% |
| Somchem S321 | <<locked>> | 82% | 35,911 psi | 77% | 2513 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 31,299 psi | 67% | 2349 fps | 97.3% |
| Somchem S335 | <<locked>> | 80% | 30,879 psi | 67% | 2333 fps | 97.1% |
| Somchem S355 | <<locked>> | 96% | 39,160 psi | 84% | 2608 fps | 95.5% |
| Somchem S355 | <<locked>> | 96% | 38,290 psi | 83% | 2582 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 36,608 psi | 79% | 2448 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 80% | 35,868 psi | 77% | 2425 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,966 psi | 69% | 2362 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 80% | 31,227 psi | 67% | 2339 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 80% | 26,963 psi | 58% | 2320 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 80% | 26,310 psi | 57% | 2293 fps | 97.5% |
| Vihtavuori N140 | <<locked>> | 80% | 28,108 psi | 61% | 2313 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 80% | 27,717 psi | 60% | 2297 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 92% | 33,098 psi | 71% | 2451 fps | 95% |
| Vihtavuori N150 | <<locked>> | 94% | 34,287 psi | 74% | 2470 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 84% | 36,796 psi | 79% | 2513 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 84% | 35,897 psi | 77% | 2484 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 82% | 28,906 psi | 62% | 2349 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 84% | 30,211 psi | 65% | 2375 fps | 95.7% |
| Winchester 748 | <<locked>> | 82% | 33,011 psi | 71% | 2487 fps | 95.3% |
| Winchester 748 | <<locked>> | 84% | 34,621 psi | 75% | 2516 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 90% | 38,711 psi | 83% | 2592 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 96 powders for .30 Fl. N.E. Purdey loaded with the .308 | 150gr | Berger Target FB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,743 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, Hodgdon TrailBoss, ReloadSwiss RS 14 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 60, IMR 3031, Accurate 4064 rank at the top here: for .30 Fl. N.E. Purdey with the .308 | 150gr | Berger Target FB 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.