Load Specifications
Load data in caliber .307 Win. with .308 | 135gr | Sierra SP SSPistol bullet and 42 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H335, Hodgdon H322 and Shooters World AR Plus.
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% | 51,387 psi | 85% | 2631 fps | 99.9% |
| Accurate 2015ᴾ | <<locked>> | 100% | 51,271 psi | 85% | 2710 fps | 99.6% |
| Accurate 2460 | <<locked>> | 98% | 53,548 psi | 89% | 2762 fps | 97.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 39,204 psi | 65% | 2575 fps | 98.2% |
| Accurate 2520ᴾ | <<locked>> | 100% | 50,212 psi | 83% | 2749 fps | 97% |
| Accurate LT-30 | <<locked>> | 92% | 52,272 psi | 87% | 2644 fps | 98.9% |
| Accurate LT-32 | <<locked>> | 92% | 52,779 psi | 88% | 2654 fps | 97.5% |
| ADI AR 2207 | <<locked>> | 90% | 51,706 psi | 86% | 2690 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 53,345 psi | 89% | 2785 fps | 98.9% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,616 psi | 79% | 2740 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 52,040 psi | 86% | 2740 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 53,388 psi | 89% | 2697 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 53,693 psi | 89% | 2680 fps | 99.3% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 54,099 psi | 90% | 2723 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 96% | 51,300 psi | 85% | 2756 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 96% | 52,663 psi | 87% | 2776 fps | 98.1% |
| Hodgdon H4198 | <<locked>> | 90% | 53,983 psi | 90% | 2690 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,155 psi | 53% | 1640 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 44,947 psi | 75% | 2710 fps | 98.4% |
| IMR 4198 | <<locked>> | 96% | 53,577 psi | 89% | 2720 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 54,186 psi | 90% | 2661 fps | 100% |
| Lovex D073.4 | <<locked>> | 90% | 50,952 psi | 85% | 2730 fps | 96.9% |
| Lovex D073.5 | <<locked>> | 98% | 54,099 psi | 90% | 2766 fps | 96.8% |
| Lovex S053 | <<locked>> | 86% | 52,504 psi | 87% | 2608 fps | 100% |
| Norma 200 | <<locked>> | 92% | 52,156 psi | 87% | 2723 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 45,745 psi | 76% | 2664 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,126 psi | 53% | 1680 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 54,143 psi | 90% | 2694 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 54,447 psi | 90% | 2776 fps | 97.4% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 50,154 psi | 83% | 2703 fps | 97.4% |
| Shooters World AR Plus | <<locked>> | 90% | 50,952 psi | 85% | 2730 fps | 96.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,534 psi | 89% | 2470 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,809 psi | 89% | 2785 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 53,301 psi | 89% | 2753 fps | 99.5% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 49,690 psi | 83% | 2635 fps | 97.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,697 psi | 66% | 2477 fps | 96.2% |
| Somchem S335ᴾ | <<locked>> | 100% | 47,921 psi | 80% | 2631 fps | 98% |
| Vihtavuori N120 | <<locked>> | 90% | 51,764 psi | 86% | 2648 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 52,939 psi | 88% | 2694 fps | 99.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 48,631 psi | 81% | 2638 fps | 99.3% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,553 psi | 67% | 2585 fps | 98.4% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,613 psi | 72% | 2602 fps | 96.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 42,250 psi | 70% | 2484 fps | 99.2% |
| Accurate 2015 | <<locked>> | 84% | 31,082 psi | 52% | 2326 fps | 95.3% |
| Accurate 2460 | <<locked>> | 90% | 40,857 psi | 68% | 2549 fps | 95.1% |
| Accurate 2495 | <<locked>> | 92% | 29,878 psi | 50% | 2369 fps | 95.2% |
| Accurate 2520 | <<locked>> | 96% | 43,555 psi | 72% | 2638 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 36,172 psi | 60% | 2356 fps | 95.5% |
| Accurate LT-32 | <<locked>> | 86% | 43,816 psi | 73% | 2503 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 38,014 psi | 63% | 2464 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 38,247 psi | 64% | 2516 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 80% | 25,367 psi | 42% | 2231 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,850 psi | 53% | 2356 fps | 96.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,436 psi | 66% | 2467 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,345 psi | 57% | 2336 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 96% | 47,819 psi | 79% | 2625 fps | 95.1% |
| Hodgdon H322 | 35.9 gr | 86% | 37,072 psi | 62% | 2490 fps | 95.4% |
| Hodgdon H335 | 39.3 gr | 88% | 40,103 psi | 67% | 2556 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 39,885 psi | 66% | 2444 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,743 psi | 39% | 1467 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 35,070 psi | 58% | 2503 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 33,678 psi | 56% | 2359 fps | 98.3% |
| IMR 4227 | <<locked>> | 80% | 45,237 psi | 75% | 2526 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 44,222 psi | 73% | 2615 fps | 95.3% |
| Lovex D073.5 | <<locked>> | 94% | 46,963 psi | 78% | 2657 fps | 95.3% |
| Lovex S053 | <<locked>> | 80% | 44,440 psi | 74% | 2487 fps | 100% |
| Norma 200 | <<locked>> | 80% | 35,839 psi | 60% | 2434 fps | 98.7% |
| Norma 202 | <<locked>> | 96% | 40,422 psi | 67% | 2566 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,569 psi | 39% | 1499 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 44,817 psi | 74% | 2552 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 44,773 psi | 74% | 2618 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 94% | 41,945 psi | 70% | 2559 fps | 95.5% |
| Shooters World AR Plus | 38.5 gr | 86% | 44,222 psi | 73% | 2615 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,263 psi | 69% | 2303 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 41,089 psi | 68% | 2569 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 34,360 psi | 57% | 2405 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 41,481 psi | 69% | 2493 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 37,608 psi | 62% | 2434 fps | 95.5% |
| Somchem S335 | <<locked>> | 92% | 37,565 psi | 62% | 2441 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 38,189 psi | 63% | 2434 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,545 psi | 51% | 2274 fps | 96.1% |
| Vihtavuori N133 | <<locked>> | 86% | 31,952 psi | 53% | 2316 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 92% | 31,778 psi | 53% | 2395 fps | 95.7% |
| Vihtavuori N140 | <<locked>> | 96% | 38,319 psi | 64% | 2497 fps | 95% |
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 42 powders for .307 Win. loaded with the .308 | 135gr | Sierra SP SSPistol. ADI AR 2219 delivers the highest muzzle velocity at 2,785 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,785 fps. Accurate 2015 gives the best case fill at 100 %, and 42 of the 42 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 135.0 gr projectile in 0.308" calls for a 1:16.5 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. Hodgdon H335, Hodgdon H322, Shooters World AR Plus rank at the top here: for .307 Win. with the .308 | 135gr | Sierra SP SSPistol 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.