Load Specifications
Load data in caliber .307 Win. with .308 | 140gr | Lehigh Defense Controlled Chaos bullet and 44 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>> | 88% | 54,027 psi | 90% | 2602 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 50,053 psi | 83% | 2628 fps | 99.5% |
| Accurate 2460 | <<locked>> | 98% | 52,388 psi | 87% | 2677 fps | 97.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 38,203 psi | 63% | 2497 fps | 98.1% |
| Accurate 2520ᴾ | <<locked>> | 100% | 48,863 psi | 81% | 2664 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 92% | 51,213 psi | 85% | 2562 fps | 98.8% |
| Accurate LT-32 | <<locked>> | 92% | 51,721 psi | 86% | 2569 fps | 97.3% |
| ADI AR 2207 | <<locked>> | 92% | 53,940 psi | 90% | 2654 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 52,257 psi | 87% | 2703 fps | 98.9% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 46,528 psi | 77% | 2654 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 98% | 54,317 psi | 90% | 2703 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 52,489 psi | 87% | 2618 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 52,605 psi | 87% | 2598 fps | 99.2% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 53,272 psi | 89% | 2644 fps | 96.3% |
| Hodgdon H322 | <<locked>> | 98% | 53,519 psi | 89% | 2720 fps | 99% |
| Hodgdon H335 | <<locked>> | 96% | 51,547 psi | 86% | 2690 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 90% | 53,548 psi | 89% | 2612 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,908 psi | 53% | 1588 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 43,990 psi | 73% | 2625 fps | 98.3% |
| IMR 4198 | <<locked>> | 96% | 52,576 psi | 87% | 2638 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 53,548 psi | 89% | 2582 fps | 100% |
| Lovex D073.4 | <<locked>> | 92% | 53,621 psi | 89% | 2703 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 98% | 52,649 psi | 87% | 2680 fps | 96.6% |
| Lovex S053 | <<locked>> | 86% | 51,793 psi | 86% | 2530 fps | 100% |
| Norma 200 | <<locked>> | 92% | 51,372 psi | 85% | 2644 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 44,846 psi | 75% | 2585 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,908 psi | 53% | 1627 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 53,447 psi | 89% | 2618 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 53,171 psi | 88% | 2690 fps | 97.2% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 49,356 psi | 82% | 2625 fps | 97.3% |
| Shooters World AR Plus | <<locked>> | 92% | 53,621 psi | 89% | 2703 fps | 97.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 52,576 psi | 87% | 2395 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 52,576 psi | 87% | 2700 fps | 98% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 52,185 psi | 87% | 2667 fps | 99.4% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 48,892 psi | 81% | 2556 fps | 97.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,073 psi | 65% | 2405 fps | 96.1% |
| Somchem S321ᴾ | <<locked>> | 100% | 54,259 psi | 90% | 2726 fps | 96.2% |
| Somchem S335ᴾ | <<locked>> | 100% | 47,036 psi | 78% | 2552 fps | 97.9% |
| Vihtavuori N110 | <<locked>> | 82% | 54,114 psi | 90% | 2477 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 53,969 psi | 90% | 2608 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 51,677 psi | 86% | 2608 fps | 99.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 47,848 psi | 79% | 2562 fps | 99.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 39,827 psi | 66% | 2510 fps | 98.3% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 42,482 psi | 71% | 2516 fps | 96.3% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 41,727 psi | 69% | 2415 fps | 99.1% |
| Accurate 2015 | <<locked>> | 84% | 30,414 psi | 51% | 2254 fps | 95.1% |
| Accurate 2460 | <<locked>> | 90% | 40,074 psi | 67% | 2474 fps | 95% |
| Accurate 2495 | <<locked>> | 92% | 29,240 psi | 49% | 2300 fps | 95.1% |
| Accurate 2520 | <<locked>> | 96% | 42,685 psi | 71% | 2562 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 35,650 psi | 59% | 2287 fps | 95.4% |
| Accurate LT-32 | <<locked>> | 86% | 43,207 psi | 72% | 2428 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 37,275 psi | 62% | 2388 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 37,507 psi | 62% | 2441 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 82% | 26,353 psi | 44% | 2211 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,212 psi | 52% | 2283 fps | 96.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 38,856 psi | 65% | 2392 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 33,721 psi | 56% | 2267 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 96% | 47,166 psi | 78% | 2546 fps | 95% |
| Hodgdon H322 | <<locked>> | 86% | 36,318 psi | 60% | 2411 fps | 95.2% |
| Hodgdon H335 | <<locked>> | 88% | 39,392 psi | 65% | 2480 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 39,320 psi | 65% | 2369 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,453 psi | 39% | 1414 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 34,258 psi | 57% | 2421 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 33,185 psi | 55% | 2290 fps | 98.2% |
| IMR 4227 | <<locked>> | 80% | 44,686 psi | 74% | 2451 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 43,265 psi | 72% | 2536 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 94% | 45,861 psi | 76% | 2575 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 43,816 psi | 73% | 2415 fps | 100% |
| Norma 200 | <<locked>> | 80% | 35,288 psi | 59% | 2362 fps | 98.6% |
| Norma 202 | <<locked>> | 96% | 39,378 psi | 65% | 2484 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,583 psi | 39% | 1453 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 44,179 psi | 73% | 2477 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 43,990 psi | 73% | 2539 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 94% | 41,292 psi | 69% | 2484 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 86% | 43,265 psi | 72% | 2536 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,712 psi | 68% | 2234 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 40,321 psi | 67% | 2490 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 33,765 psi | 56% | 2333 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 40,495 psi | 67% | 2415 fps | 95.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 36,680 psi | 61% | 2356 fps | 95.3% |
| Somchem S321 | <<locked>> | 98% | 50,415 psi | 84% | 2667 fps | 95.4% |
| Somchem S335 | <<locked>> | 92% | 36,999 psi | 61% | 2372 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 80% | 51,024 psi | 85% | 2441 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 37,391 psi | 62% | 2359 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,226 psi | 50% | 2211 fps | 96.1% |
| Vihtavuori N133 | <<locked>> | 86% | 31,328 psi | 52% | 2244 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 92% | 31,125 psi | 52% | 2323 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 98% | 39,871 psi | 66% | 2467 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 | 140gr | Lehigh Defense Controlled Chaos. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,776 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,776 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 140.0 gr projectile in 0.308" calls for a 1:14.5 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. 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.