Load Specifications
Load data in caliber .307 Win. with .308 | 125gr | Berger Target FB bullet and 37 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>> | 90% | 54,331 psi | 90% | 2759 fps | 99.8% |
| Accurate 2015ᴾ | <<locked>> | 100% | 46,340 psi | 77% | 2720 fps | 98.4% |
| Accurate 2460ᴾ | <<locked>> | 100% | 51,793 psi | 86% | 2818 fps | 96.6% |
| Accurate LT-30 | <<locked>> | 96% | 54,433 psi | 90% | 2759 fps | 98.4% |
| Accurate LT-32 | <<locked>> | 94% | 51,764 psi | 86% | 2713 fps | 96.1% |
| ADI AR 2205 | <<locked>> | 82% | 53,026 psi | 88% | 2635 fps | 100% |
| ADI AR 2207 | <<locked>> | 94% | 53,214 psi | 88% | 2808 fps | 100% |
| ADI AR 2219 | <<locked>> | 96% | 51,764 psi | 86% | 2844 fps | 97.8% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 43,047 psi | 72% | 2746 fps | 99.6% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 53,563 psi | 89% | 2854 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 92% | 52,301 psi | 87% | 2772 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 52,576 psi | 87% | 2746 fps | 98.4% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 53,447 psi | 89% | 2871 fps | 98.1% |
| Hodgdon H335 | <<locked>> | 98% | 51,068 psi | 85% | 2831 fps | 96.7% |
| Hodgdon H4198 | <<locked>> | 92% | 53,243 psi | 88% | 2756 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,299 psi | 52% | 1683 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 40,654 psi | 68% | 2703 fps | 96.1% |
| IMR 4198 | <<locked>> | 98% | 52,533 psi | 87% | 2795 fps | 100% |
| IMR 4227 | <<locked>> | 88% | 53,780 psi | 89% | 2746 fps | 100% |
| Lovex D060 | <<locked>> | 82% | 53,461 psi | 89% | 2776 fps | 100% |
| Lovex D073.4 | <<locked>> | 94% | 53,330 psi | 89% | 2848 fps | 96.1% |
| Lovex S053 | <<locked>> | 88% | 51,953 psi | 86% | 2694 fps | 100% |
| Norma 200 | <<locked>> | 96% | 53,867 psi | 89% | 2841 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,183 psi | 52% | 1726 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 53,098 psi | 88% | 2772 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 52,968 psi | 88% | 2835 fps | 95.9% |
| Shooters World AR Plus | <<locked>> | 94% | 53,330 psi | 89% | 2848 fps | 96.1% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 53,461 psi | 89% | 2776 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 92% | 52,692 psi | 88% | 2556 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 96% | 52,156 psi | 87% | 2844 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 51,532 psi | 86% | 2812 fps | 98.6% |
| Somchem S335ᴾ | <<locked>> | 100% | 43,729 psi | 73% | 2638 fps | 96% |
| Vihtavuori N110 | <<locked>> | 84% | 54,389 psi | 90% | 2648 fps | 100% |
| Vihtavuori N120 | <<locked>> | 94% | 53,272 psi | 89% | 2762 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 51,430 psi | 85% | 2759 fps | 99.5% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 44,643 psi | 74% | 2654 fps | 97.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 36,724 psi | 61% | 2585 fps | 96.2% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 39,262 psi | 65% | 2507 fps | 97.8% |
| Accurate 2015 | <<locked>> | 90% | 33,910 psi | 56% | 2470 fps | 95.1% |
| Accurate 2460 | <<locked>> | 96% | 45,092 psi | 75% | 2707 fps | 95% |
| Accurate LT-30 | <<locked>> | 86% | 40,350 psi | 67% | 2516 fps | 95.5% |
| Accurate LT-32 | <<locked>> | 92% | 48,660 psi | 81% | 2664 fps | 95.4% |
| ADI AR 2205 | <<locked>> | 80% | 49,806 psi | 83% | 2589 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 34,664 psi | 58% | 2484 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 90% | 42,511 psi | 71% | 2680 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 88% | 29,486 psi | 49% | 2425 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 30,806 psi | 51% | 2408 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,318 psi | 60% | 2480 fps | 97.7% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 38,450 psi | 64% | 2497 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 92% | 41,176 psi | 68% | 2651 fps | 95.3% |
| Hodgdon H335 | <<locked>> | 94% | 44,788 psi | 74% | 2723 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 84% | 41,872 psi | 70% | 2559 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,134 psi | 38% | 1506 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 38,218 psi | 63% | 2648 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 31,270 psi | 52% | 2372 fps | 96.4% |
| IMR 4227 | <<locked>> | 80% | 42,221 psi | 70% | 2559 fps | 99.8% |
| Lovex D060 | <<locked>> | 80% | 50,270 psi | 84% | 2726 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 92% | 49,559 psi | 82% | 2789 fps | 95.3% |
| Lovex S053 | <<locked>> | 80% | 41,365 psi | 69% | 2526 fps | 100% |
| Norma 200 | <<locked>> | 80% | 32,576 psi | 54% | 2441 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,887 psi | 38% | 1539 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 41,365 psi | 69% | 2579 fps | 99.7% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 49,821 psi | 83% | 2782 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 92% | 49,559 psi | 82% | 2789 fps | 95.3% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 50,270 psi | 84% | 2726 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 38,450 psi | 64% | 2346 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 45,803 psi | 76% | 2736 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 37,739 psi | 63% | 2556 fps | 95.4% |
| Somchem S335 | <<locked>> | 98% | 41,162 psi | 68% | 2589 fps | 95.2% |
| Vihtavuori N110 | <<locked>> | 80% | 48,472 psi | 81% | 2566 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 34,809 psi | 58% | 2454 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 31,691 psi | 53% | 2375 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 92% | 35,056 psi | 58% | 2464 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 98% | 34,476 psi | 57% | 2533 fps | 95.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 37 powders for .307 Win. loaded with the .308 | 125gr | Berger Target FB. Hodgdon H322 delivers the highest muzzle velocity at 2,871 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,871 fps. Accurate 2015 gives the best case fill at 100 %, and 37 of the 37 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Alliant AR-Comp 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.