Load Specifications
Load data in caliber .307 Win. with .308 | 130gr | Barnes X BT bullet and 39 powders. The key underlying parameters are shown in the table above.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 86% | 51,488 psi | 86% | 2648 fps | 99.7% |
| Accurate 2015ᴾ | <<locked>> | 100% | 51,126 psi | 85% | 2717 fps | 99.2% |
| Accurate 2460 | <<locked>> | 98% | 53,809 psi | 89% | 2772 fps | 97.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,393 psi | 67% | 2602 fps | 97.8% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,893 psi | 83% | 2753 fps | 96% |
| Accurate LT-30 | <<locked>> | 92% | 51,779 psi | 86% | 2648 fps | 98.3% |
| Accurate LT-32 | <<locked>> | 92% | 52,199 psi | 87% | 2651 fps | 96.5% |
| ADI AR 2207 | <<locked>> | 90% | 51,459 psi | 85% | 2703 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 52,576 psi | 87% | 2785 fps | 98.2% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,181 psi | 78% | 2746 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 51,880 psi | 86% | 2749 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 90% | 53,606 psi | 89% | 2713 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 52,910 psi | 88% | 2680 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 98% | 53,824 psi | 89% | 2805 fps | 98.4% |
| Hodgdon H335 | <<locked>> | 96% | 51,851 psi | 86% | 2772 fps | 97.1% |
| Hodgdon H4198 | <<locked>> | 90% | 53,621 psi | 89% | 2690 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,503 psi | 54% | 1650 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 44,701 psi | 74% | 2710 fps | 97.6% |
| IMR 4198 | <<locked>> | 96% | 52,953 psi | 88% | 2726 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 53,737 psi | 89% | 2667 fps | 100% |
| Lovex D073.4 | <<locked>> | 90% | 51,227 psi | 85% | 2740 fps | 96% |
| Lovex D073.5 | <<locked>> | 98% | 53,983 psi | 90% | 2772 fps | 95.8% |
| Lovex S053 | <<locked>> | 86% | 52,823 psi | 88% | 2625 fps | 100% |
| Norma 200 | <<locked>> | 92% | 53,011 psi | 88% | 2746 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 45,614 psi | 76% | 2667 fps | 95.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,619 psi | 54% | 1693 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 53,780 psi | 89% | 2703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 53,954 psi | 90% | 2779 fps | 96.4% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 51,198 psi | 85% | 2723 fps | 96.8% |
| Shooters World AR Plus | <<locked>> | 90% | 51,227 psi | 85% | 2740 fps | 96% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,534 psi | 89% | 2490 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,345 psi | 89% | 2792 fps | 97.4% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 52,576 psi | 87% | 2753 fps | 98.9% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 49,676 psi | 83% | 2641 fps | 96.6% |
| Somchem S335ᴾ | <<locked>> | 100% | 48,095 psi | 80% | 2638 fps | 97.3% |
| Vihtavuori N120 | <<locked>> | 90% | 51,488 psi | 86% | 2661 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 52,402 psi | 87% | 2697 fps | 99.7% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 48,486 psi | 81% | 2644 fps | 98.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,930 psi | 68% | 2598 fps | 97.8% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 42,540 psi | 71% | 2497 fps | 98.7% |
| Accurate 2015 | <<locked>> | 86% | 34,301 psi | 57% | 2402 fps | 95.6% |
| Accurate 2460 | <<locked>> | 92% | 44,222 psi | 73% | 2615 fps | 95.1% |
| Accurate 2495 | <<locked>> | 92% | 31,763 psi | 53% | 2415 fps | 95.1% |
| Accurate 2520 | <<locked>> | 98% | 46,601 psi | 77% | 2697 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 82% | 38,827 psi | 65% | 2411 fps | 95.4% |
| Accurate LT-32 | <<locked>> | 88% | 46,775 psi | 78% | 2562 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 38,754 psi | 64% | 2487 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 41,002 psi | 68% | 2575 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 82% | 28,050 psi | 47% | 2306 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 32,692 psi | 54% | 2379 fps | 96.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,147 psi | 67% | 2484 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 37,043 psi | 62% | 2398 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 88% | 39,813 psi | 66% | 2552 fps | 95.3% |
| Hodgdon H335 | <<locked>> | 92% | 45,716 psi | 76% | 2671 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 80% | 40,379 psi | 67% | 2457 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,207 psi | 40% | 1473 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 37,724 psi | 63% | 2566 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 34,200 psi | 57% | 2372 fps | 97.8% |
| IMR 4227 | <<locked>> | 80% | 45,266 psi | 75% | 2536 fps | 100% |
| Lovex D073.4 | <<locked>> | 88% | 47,732 psi | 79% | 2680 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 96% | 50,401 psi | 84% | 2717 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 44,715 psi | 74% | 2503 fps | 100% |
| Norma 200 | <<locked>> | 80% | 37,507 psi | 62% | 2467 fps | 98.4% |
| Norma 202 | <<locked>> | 98% | 43,004 psi | 71% | 2618 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,163 psi | 40% | 1509 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,266 psi | 75% | 2572 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 47,543 psi | 79% | 2674 fps | 95% |
| Rottweil R 901 | <<locked>> | 96% | 45,658 psi | 76% | 2625 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 88% | 47,732 psi | 79% | 2680 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,713 psi | 69% | 2320 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 44,092 psi | 73% | 2631 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 36,999 psi | 61% | 2467 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 44,353 psi | 74% | 2549 fps | 95.3% |
| Somchem S335 | <<locked>> | 94% | 40,770 psi | 68% | 2507 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 38,783 psi | 64% | 2454 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,676 psi | 53% | 2300 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 88% | 34,432 psi | 57% | 2375 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 92% | 32,692 psi | 54% | 2415 fps | 95.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 39 powders for .307 Win. loaded with the .308 | 130gr | Barnes X BT. Hodgdon H322 delivers the highest muzzle velocity at 2,805 fps; across all powders the maximum-charge window runs from 1,650 fps to 2,805 fps. Accurate 2015 gives the best case fill at 100 %, and 39 of the 39 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.