Load Specifications
Load data in caliber .307 Win. with .308 | 115gr | Berger Target FB bullet and 31 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% | 52,895 psi | 88% | 2861 fps | 99.4% |
| Accurate 2015ᴾ | <<locked>> | 100% | 44,686 psi | 74% | 2805 fps | 97.5% |
| Accurate LT-30 | <<locked>> | 96% | 53,156 psi | 88% | 2858 fps | 97.7% |
| Accurate LT-32 | <<locked>> | 96% | 53,679 psi | 89% | 2861 fps | 95.7% |
| ADI AR 2205 | <<locked>> | 82% | 51,982 psi | 86% | 2746 fps | 100% |
| ADI AR 2207 | <<locked>> | 94% | 51,953 psi | 86% | 2923 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 53,940 psi | 90% | 3002 fps | 97.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 41,466 psi | 69% | 2831 fps | 99% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 51,808 psi | 86% | 2956 fps | 99.4% |
| Alliant Reloder-7 | <<locked>> | 94% | 54,230 psi | 90% | 2930 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 51,430 psi | 85% | 2844 fps | 97.7% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 51,445 psi | 85% | 2963 fps | 97.1% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 53,171 psi | 88% | 2986 fps | 96.4% |
| Hodgdon H4198 | <<locked>> | 92% | 52,141 psi | 87% | 2861 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,009 psi | 52% | 1768 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 53,722 psi | 89% | 2940 fps | 99.9% |
| IMR 4227 | <<locked>> | 88% | 52,373 psi | 87% | 2854 fps | 100% |
| Lovex D060 | <<locked>> | 82% | 52,025 psi | 86% | 2884 fps | 99.7% |
| Lovex S053 | <<locked>> | 90% | 53,316 psi | 89% | 2844 fps | 100% |
| Norma 200 | <<locked>> | 96% | 52,127 psi | 87% | 2943 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,792 psi | 51% | 1811 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 51,663 psi | 86% | 2881 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 52,025 psi | 86% | 2884 fps | 99.7% |
| Shooters World SOCOM | <<locked>> | 82% | 53,258 psi | 88% | 2858 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 54,056 psi | 90% | 2700 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 54,375 psi | 90% | 3002 fps | 96.6% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 53,200 psi | 88% | 2963 fps | 98.3% |
| Vihtavuori N110 | <<locked>> | 84% | 52,663 psi | 87% | 2756 fps | 100% |
| Vihtavuori N120 | <<locked>> | 94% | 52,025 psi | 86% | 2877 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 49,937 psi | 83% | 2858 fps | 99% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 43,221 psi | 72% | 2743 fps | 96.9% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 38,043 psi | 63% | 2592 fps | 96.9% |
| Accurate 2015 | <<locked>> | 94% | 37,086 psi | 62% | 2654 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 88% | 41,597 psi | 69% | 2651 fps | 95% |
| Accurate LT-32 | <<locked>> | 94% | 50,560 psi | 84% | 2812 fps | 95% |
| ADI AR 2205 | <<locked>> | 80% | 48,921 psi | 81% | 2700 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 33,446 psi | 56% | 2569 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 92% | 44,164 psi | 73% | 2828 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 90% | 30,327 psi | 50% | 2552 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 86% | 33,591 psi | 56% | 2589 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 35,070 psi | 58% | 2566 fps | 96.6% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 42,511 psi | 71% | 2687 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 96% | 45,527 psi | 76% | 2854 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 98% | 49,661 psi | 83% | 2923 fps | 95.6% |
| Hodgdon H4198 | <<locked>> | 88% | 45,977 psi | 76% | 2753 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,872 psi | 38% | 1585 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 30,226 psi | 50% | 2448 fps | 95.1% |
| IMR 4227 | <<locked>> | 80% | 41,118 psi | 68% | 2654 fps | 99.4% |
| Lovex D060 | <<locked>> | 80% | 49,023 psi | 81% | 2828 fps | 99.5% |
| Lovex S053 | <<locked>> | 80% | 40,001 psi | 66% | 2621 fps | 100% |
| Norma 200 | <<locked>> | 80% | 31,488 psi | 52% | 2523 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,582 psi | 38% | 1617 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 40,321 psi | 67% | 2677 fps | 99.2% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 49,023 psi | 81% | 2828 fps | 99.5% |
| Shooters World SOCOM | <<locked>> | 80% | 49,719 psi | 83% | 2802 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 37,536 psi | 62% | 2448 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 47,543 psi | 79% | 2884 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 39,059 psi | 65% | 2700 fps | 95% |
| Vihtavuori N110 | <<locked>> | 80% | 47,050 psi | 78% | 2674 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 33,663 psi | 56% | 2543 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 88% | 34,708 psi | 58% | 2559 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 96% | 38,305 psi | 64% | 2644 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 51 powders for .307 Win. loaded with the .308 | 115gr | Berger Target FB. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,768 fps to 3,005 fps. Accurate 2015 gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Accurate 2495 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. As outliers, Accurate 2495, Accurate 2520, Alliant Power Pro 1200-R 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.