Load Specifications
Load data in caliber .307 Win. with .308 | 135gr | Sierra VarmintKing 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 H322, Shooters World AR Plus and Lovex D073.4.
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% | 51,619 psi | 86% | 2638 fps | 99.9% |
| Accurate 2015ᴾ | <<locked>> | 100% | 51,488 psi | 86% | 2713 fps | 99.6% |
| Accurate 2460 | <<locked>> | 98% | 54,186 psi | 90% | 2772 fps | 98.1% |
| Accurate 2495ᴾ | <<locked>> | 100% | 39,479 psi | 66% | 2582 fps | 98.3% |
| Accurate 2520ᴾ | <<locked>> | 100% | 50,444 psi | 84% | 2756 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 92% | 52,504 psi | 87% | 2651 fps | 99% |
| Accurate LT-32 | <<locked>> | 92% | 53,011 psi | 88% | 2661 fps | 97.5% |
| ADI AR 2207 | <<locked>> | 90% | 52,040 psi | 86% | 2697 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 53,548 psi | 89% | 2792 fps | 99% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,805 psi | 79% | 2746 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 52,402 psi | 87% | 2746 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 53,679 psi | 89% | 2703 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 53,853 psi | 89% | 2687 fps | 99.3% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 54,360 psi | 90% | 2730 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 96% | 51,503 psi | 86% | 2759 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 96% | 52,794 psi | 88% | 2779 fps | 98.1% |
| Hodgdon H4198 | <<locked>> | 90% | 54,244 psi | 90% | 2697 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,271 psi | 54% | 1647 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 45,223 psi | 75% | 2717 fps | 98.5% |
| IMR 4198 | <<locked>> | 96% | 53,882 psi | 90% | 2726 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 51,213 psi | 85% | 2618 fps | 100% |
| Lovex D073.4 | <<locked>> | 90% | 51,648 psi | 86% | 2743 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 98% | 54,244 psi | 90% | 2772 fps | 96.9% |
| Lovex S053 | <<locked>> | 86% | 52,852 psi | 88% | 2615 fps | 100% |
| Norma 200 | <<locked>> | 92% | 52,431 psi | 87% | 2730 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 46,311 psi | 77% | 2674 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,908 psi | 53% | 1680 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 54,462 psi | 90% | 2700 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 51,445 psi | 85% | 2733 fps | 96.9% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 50,357 psi | 84% | 2710 fps | 97.5% |
| Shooters World AR Plus | <<locked>> | 90% | 51,648 psi | 86% | 2743 fps | 97.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,838 psi | 89% | 2477 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,969 psi | 90% | 2792 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 53,577 psi | 89% | 2759 fps | 99.5% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 50,241 psi | 83% | 2644 fps | 97.5% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 40,205 psi | 67% | 2487 fps | 96.4% |
| Somchem S335ᴾ | <<locked>> | 100% | 48,138 psi | 80% | 2638 fps | 98.1% |
| Vihtavuori N120 | <<locked>> | 90% | 52,054 psi | 86% | 2651 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 53,171 psi | 88% | 2700 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 49,240 psi | 82% | 2651 fps | 99.4% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 41,147 psi | 68% | 2598 fps | 98.5% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,758 psi | 73% | 2605 fps | 96.7% |
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% | 42,511 psi | 71% | 2493 fps | 99.2% |
| Accurate 2015 | <<locked>> | 84% | 31,328 psi | 52% | 2333 fps | 95.4% |
| Accurate 2460 | <<locked>> | 90% | 41,046 psi | 68% | 2556 fps | 95.2% |
| Accurate 2495 | <<locked>> | 92% | 30,110 psi | 50% | 2375 fps | 95.4% |
| Accurate 2520 | <<locked>> | 96% | 44,019 psi | 73% | 2648 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 36,419 psi | 61% | 2362 fps | 95.6% |
| Accurate LT-32 | <<locked>> | 86% | 44,048 psi | 73% | 2510 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 38,029 psi | 63% | 2467 fps | 100% |
| ADI AR 2219 | <<locked>> | 82% | 35,926 psi | 60% | 2467 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 25,338 psi | 42% | 2231 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,821 psi | 53% | 2356 fps | 96.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,436 psi | 66% | 2467 fps | 99.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,548 psi | 57% | 2346 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 96% | 47,993 psi | 80% | 2628 fps | 95.2% |
| Hodgdon H322 | 36.1 gr | 86% | 37,304 psi | 62% | 2497 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 88% | 40,321 psi | 67% | 2562 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 40,176 psi | 67% | 2454 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,598 psi | 39% | 1467 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 35,273 psi | 59% | 2510 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 33,968 psi | 56% | 2369 fps | 98.4% |
| IMR 4227 | <<locked>> | 80% | 45,542 psi | 76% | 2533 fps | 100% |
| Lovex D073.4 | 38.8 gr | 86% | 44,788 psi | 74% | 2628 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 94% | 47,152 psi | 78% | 2661 fps | 95.3% |
| Lovex S053 | <<locked>> | 80% | 44,715 psi | 74% | 2493 fps | 100% |
| Norma 200 | <<locked>> | 80% | 36,129 psi | 60% | 2441 fps | 98.7% |
| Norma 202 | <<locked>> | 96% | 40,683 psi | 68% | 2572 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,699 psi | 39% | 1506 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,121 psi | 75% | 2559 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 44,976 psi | 75% | 2625 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 94% | 42,177 psi | 70% | 2566 fps | 95.6% |
| Shooters World AR Plus | 38.8 gr | 86% | 44,788 psi | 74% | 2628 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,292 psi | 69% | 2306 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 41,379 psi | 69% | 2575 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 34,592 psi | 57% | 2411 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 41,698 psi | 69% | 2500 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 37,782 psi | 63% | 2441 fps | 95.6% |
| Somchem S335 | <<locked>> | 92% | 37,753 psi | 63% | 2448 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 38,174 psi | 63% | 2434 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,806 psi | 51% | 2280 fps | 96.2% |
| Vihtavuori N133 | <<locked>> | 86% | 32,126 psi | 53% | 2323 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 90% | 30,095 psi | 50% | 2352 fps | 95% |
| Vihtavuori N140 | <<locked>> | 96% | 38,566 psi | 64% | 2503 fps | 95.1% |
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 VarmintKing. ADI AR 2219 delivers the highest muzzle velocity at 2,792 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,792 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 1:17.0 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. Hodgdon H322, Shooters World AR Plus, Lovex D073.4 rank at the top here: for .307 Win. with the .308 | 135gr | Sierra VarmintKing 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.