Load Specifications
Load data in caliber .307 Win. with .308 | 135gr | Sierra HPBT MatchKing bullet and 43 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% | 51,053 psi | 85% | 2625 fps | 99.9% |
| Accurate 2015ᴾ | <<locked>> | 100% | 50,865 psi | 85% | 2703 fps | 99.6% |
| Accurate 2460 | <<locked>> | 98% | 53,200 psi | 88% | 2753 fps | 97.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 38,899 psi | 65% | 2566 fps | 98.1% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,588 psi | 82% | 2736 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 92% | 51,503 psi | 86% | 2631 fps | 98.8% |
| Accurate LT-32 | <<locked>> | 92% | 52,011 psi | 86% | 2641 fps | 97.3% |
| ADI AR 2207 | <<locked>> | 90% | 51,213 psi | 85% | 2684 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 52,968 psi | 88% | 2779 fps | 98.9% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 46,905 psi | 78% | 2726 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 51,634 psi | 86% | 2733 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 52,968 psi | 88% | 2690 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 53,476 psi | 89% | 2677 fps | 99.2% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 53,461 psi | 89% | 2710 fps | 96.3% |
| Hodgdon H322 | <<locked>> | 98% | 54,273 psi | 90% | 2795 fps | 99% |
| Hodgdon H335 | <<locked>> | 96% | 51,924 psi | 86% | 2762 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 90% | 53,998 psi | 90% | 2687 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,140 psi | 53% | 1637 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 44,628 psi | 74% | 2700 fps | 98.3% |
| IMR 4198 | <<locked>> | 96% | 53,142 psi | 88% | 2710 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 53,693 psi | 89% | 2651 fps | 100% |
| Lovex D073.4 | <<locked>> | 92% | 54,346 psi | 90% | 2779 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 98% | 53,330 psi | 89% | 2753 fps | 96.6% |
| Lovex S053 | <<locked>> | 86% | 52,388 psi | 87% | 2602 fps | 100% |
| Norma 200 | <<locked>> | 92% | 51,750 psi | 86% | 2713 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 45,455 psi | 76% | 2654 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,792 psi | 53% | 1673 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 53,664 psi | 89% | 2684 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 53,766 psi | 89% | 2766 fps | 97.2% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 49,806 psi | 83% | 2694 fps | 97.3% |
| Shooters World AR Plus | <<locked>> | 92% | 54,346 psi | 90% | 2779 fps | 97.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 52,982 psi | 88% | 2464 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,534 psi | 89% | 2779 fps | 98.1% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 52,910 psi | 88% | 2743 fps | 99.4% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 49,327 psi | 82% | 2625 fps | 97.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,465 psi | 66% | 2470 fps | 96% |
| Somchem S335ᴾ | <<locked>> | 100% | 47,645 psi | 79% | 2625 fps | 97.9% |
| Vihtavuori N110 | <<locked>> | 82% | 54,360 psi | 90% | 2546 fps | 100% |
| Vihtavuori N120 | <<locked>> | 90% | 51,285 psi | 85% | 2638 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 52,156 psi | 87% | 2677 fps | 99.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 48,327 psi | 80% | 2631 fps | 99.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,248 psi | 67% | 2579 fps | 98.3% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 42,975 psi | 71% | 2585 fps | 96.4% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 41,916 psi | 70% | 2477 fps | 99.1% |
| Accurate 2015 | <<locked>> | 84% | 30,734 psi | 51% | 2316 fps | 95.1% |
| Accurate 2460 | <<locked>> | 90% | 40,480 psi | 67% | 2539 fps | 95% |
| Accurate 2495 | <<locked>> | 92% | 29,515 psi | 49% | 2356 fps | 95% |
| Accurate 2520 | <<locked>> | 96% | 43,192 psi | 72% | 2628 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 36,085 psi | 60% | 2352 fps | 95.4% |
| Accurate LT-32 | <<locked>> | 86% | 43,758 psi | 73% | 2500 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 37,594 psi | 62% | 2454 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 37,898 psi | 63% | 2507 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 82% | 26,672 psi | 44% | 2270 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,444 psi | 52% | 2346 fps | 96.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,059 psi | 65% | 2457 fps | 99% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,055 psi | 57% | 2329 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 98% | 50,401 psi | 84% | 2664 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 86% | 36,724 psi | 61% | 2480 fps | 95.2% |
| Hodgdon H335 | <<locked>> | 88% | 39,842 psi | 66% | 2546 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 39,827 psi | 66% | 2441 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,656 psi | 39% | 1463 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 34,766 psi | 58% | 2493 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 33,591 psi | 56% | 2352 fps | 98.2% |
| IMR 4227 | <<locked>> | 80% | 45,121 psi | 75% | 2520 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 43,787 psi | 73% | 2605 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 94% | 46,311 psi | 77% | 2641 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 44,266 psi | 74% | 2484 fps | 100% |
| Norma 200 | <<locked>> | 80% | 35,737 psi | 59% | 2431 fps | 98.6% |
| Norma 202 | <<locked>> | 96% | 40,132 psi | 67% | 2556 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,496 psi | 39% | 1496 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 44,715 psi | 74% | 2549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 44,411 psi | 74% | 2608 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 94% | 41,597 psi | 69% | 2549 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 86% | 43,787 psi | 73% | 2605 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,770 psi | 68% | 2293 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 40,785 psi | 68% | 2559 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 34,258 psi | 57% | 2402 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 41,147 psi | 68% | 2487 fps | 95.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 37,028 psi | 62% | 2418 fps | 95.2% |
| Somchem S335 | <<locked>> | 92% | 37,231 psi | 62% | 2431 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 80% | 51,358 psi | 85% | 2507 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 37,768 psi | 63% | 2425 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,458 psi | 51% | 2270 fps | 96% |
| Vihtavuori N133 | <<locked>> | 86% | 31,589 psi | 52% | 2306 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 92% | 31,473 psi | 52% | 2385 fps | 95.5% |
| Vihtavuori N140 | <<locked>> | 98% | 40,437 psi | 67% | 2539 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 72 powders for .307 Win. loaded with the .308 | 135gr | Sierra HPBT MatchKing. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,848 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,848 fps. Accurate 2015 gives the best case fill at 100 %, and 72 of the 72 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 1:15.0 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. As outliers, Accurate 2200, Accurate 2230, Accurate 4064 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.