Load Specifications
Load data in caliber .307 Win. with .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC bullet and 43 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2219, Hodgdon H335 and Hodgdon H322.
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% | 54,346 psi | 90% | 2671 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 50,604 psi | 84% | 2697 fps | 99.5% |
| Accurate 2460 | <<locked>> | 98% | 53,011 psi | 88% | 2749 fps | 97.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 38,595 psi | 64% | 2559 fps | 98% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,719 psi | 83% | 2740 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 92% | 51,677 psi | 86% | 2631 fps | 98.8% |
| Accurate LT-32 | <<locked>> | 92% | 52,185 psi | 87% | 2641 fps | 97.3% |
| ADI AR 2207 | <<locked>> | 92% | 54,259 psi | 90% | 2723 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 52,721 psi | 88% | 2772 fps | 98.8% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,007 psi | 78% | 2726 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 51,372 psi | 85% | 2726 fps | 99.9% |
| Alliant Reloder-7 | <<locked>> | 90% | 53,156 psi | 88% | 2690 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 53,243 psi | 88% | 2671 fps | 99.2% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 53,577 psi | 89% | 2710 fps | 96.3% |
| Hodgdon H322 | <<locked>> | 98% | 53,983 psi | 90% | 2792 fps | 99% |
| Hodgdon H335 | <<locked>> | 96% | 52,040 psi | 86% | 2762 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 90% | 53,751 psi | 89% | 2680 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,198 psi | 53% | 1640 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 44,411 psi | 74% | 2697 fps | 98.2% |
| IMR 4198 | <<locked>> | 96% | 53,258 psi | 88% | 2710 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 53,853 psi | 89% | 2651 fps | 100% |
| Lovex D073.4 | <<locked>> | 92% | 54,085 psi | 90% | 2772 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 98% | 53,098 psi | 88% | 2749 fps | 96.5% |
| Lovex S053 | <<locked>> | 86% | 52,141 psi | 87% | 2598 fps | 100% |
| Norma 200 | <<locked>> | 92% | 51,866 psi | 86% | 2713 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 45,194 psi | 75% | 2648 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,836 psi | 53% | 1673 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 53,838 psi | 89% | 2684 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 53,882 psi | 90% | 2762 fps | 97.2% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 49,501 psi | 82% | 2690 fps | 97.2% |
| Shooters World AR Plus | <<locked>> | 92% | 54,085 psi | 90% | 2772 fps | 97.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,127 psi | 88% | 2464 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,258 psi | 88% | 2772 fps | 98% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 52,591 psi | 87% | 2736 fps | 99.4% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 49,443 psi | 82% | 2625 fps | 97.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,552 psi | 66% | 2470 fps | 96% |
| Somchem S335ᴾ | <<locked>> | 100% | 47,384 psi | 79% | 2618 fps | 97.8% |
| Vihtavuori N110 | <<locked>> | 82% | 54,433 psi | 90% | 2546 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 54,244 psi | 90% | 2677 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 52,359 psi | 87% | 2680 fps | 99.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 48,472 psi | 81% | 2631 fps | 99.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,350 psi | 67% | 2579 fps | 98.3% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,120 psi | 72% | 2585 fps | 96.4% |
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% | 41,989 psi | 70% | 2474 fps | 99.1% |
| Accurate 2015 | <<locked>> | 84% | 30,806 psi | 51% | 2316 fps | 95.1% |
| Accurate 2460 | <<locked>> | 92% | 43,178 psi | 72% | 2589 fps | 95.7% |
| Accurate 2495 | <<locked>> | 92% | 29,631 psi | 49% | 2359 fps | 95.1% |
| Accurate 2520 | <<locked>> | 96% | 43,033 psi | 71% | 2625 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 35,911 psi | 60% | 2346 fps | 95.3% |
| Accurate LT-32 | <<locked>> | 86% | 43,569 psi | 72% | 2493 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 37,652 psi | 63% | 2457 fps | 100% |
| ADI AR 2219 | 35.9 gr | 84% | 37,724 psi | 63% | 2500 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 82% | 26,731 psi | 44% | 2270 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,531 psi | 52% | 2346 fps | 96.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,131 psi | 65% | 2457 fps | 99% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,127 psi | 57% | 2329 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 98% | 50,546 psi | 84% | 2664 fps | 95.6% |
| Hodgdon H322 | 35.6 gr | 86% | 36,825 psi | 61% | 2480 fps | 95.2% |
| Hodgdon H335 | 39.8 gr | 90% | 42,409 psi | 70% | 2595 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 39,595 psi | 66% | 2434 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,699 psi | 39% | 1463 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 34,606 psi | 57% | 2487 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 33,402 psi | 55% | 2349 fps | 98.2% |
| IMR 4227 | <<locked>> | 80% | 44,846 psi | 75% | 2516 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 43,976 psi | 73% | 2608 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 94% | 46,441 psi | 77% | 2641 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 44,019 psi | 73% | 2477 fps | 100% |
| Norma 200 | <<locked>> | 80% | 35,505 psi | 59% | 2425 fps | 98.5% |
| Norma 202 | <<locked>> | 96% | 39,929 psi | 66% | 2549 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,540 psi | 39% | 1496 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 44,454 psi | 74% | 2543 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 44,585 psi | 74% | 2608 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 94% | 41,713 psi | 69% | 2549 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 86% | 43,976 psi | 73% | 2608 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,886 psi | 68% | 2293 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 40,857 psi | 68% | 2559 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 34,069 psi | 57% | 2395 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 40,915 psi | 68% | 2480 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 37,188 psi | 62% | 2421 fps | 95.3% |
| Somchem S335 | <<locked>> | 92% | 37,347 psi | 62% | 2434 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 80% | 51,459 psi | 85% | 2510 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 37,826 psi | 63% | 2425 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,269 psi | 50% | 2264 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 86% | 31,676 psi | 53% | 2306 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 92% | 31,314 psi | 52% | 2379 fps | 95.5% |
| Vihtavuori N140 | <<locked>> | 98% | 40,248 psi | 67% | 2533 fps | 95.5% |
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 43 powders for .307 Win. loaded with the .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC. Hodgdon H322 delivers the highest muzzle velocity at 2,792 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,792 fps. Accurate 2015 gives the best case fill at 100 %, and 43 of the 43 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 1:16.0 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. ADI AR 2219, Hodgdon H335, Hodgdon H322 rank at the top here: for .307 Win. with the .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC 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.