Load Specifications
Load data in caliber .307 Win. with .308 | 155gr | Sierra MatchKing bullet and 56 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% | 54,447 psi | 90% | 2484 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 51,619 psi | 86% | 2523 fps | 100% |
| Accurate 2460 | <<locked>> | 96% | 53,882 psi | 90% | 2575 fps | 98.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 42,815 psi | 71% | 2454 fps | 99.6% |
| Accurate 2520ᴾ | <<locked>> | 100% | 54,085 psi | 90% | 2615 fps | 98.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 39,798 psi | 66% | 2421 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 90% | 51,880 psi | 86% | 2451 fps | 99.6% |
| Accurate LT-32 | <<locked>> | 90% | 52,344 psi | 87% | 2461 fps | 98.4% |
| ADI AR 2207 | <<locked>> | 88% | 51,634 psi | 86% | 2487 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 53,330 psi | 89% | 2592 fps | 99.6% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 54,114 psi | 90% | 2582 fps | 97.1% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 51,111 psi | 85% | 2592 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 51,184 psi | 85% | 2621 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 94% | 52,373 psi | 87% | 2543 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 88% | 53,505 psi | 89% | 2500 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 53,519 psi | 89% | 2490 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 98% | 53,998 psi | 90% | 2536 fps | 97.7% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 51,459 psi | 85% | 2598 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 94% | 51,184 psi | 85% | 2559 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 94% | 52,388 psi | 87% | 2582 fps | 99% |
| Hodgdon H4198 | <<locked>> | 88% | 53,766 psi | 89% | 2493 fps | 99.5% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 51,053 psi | 85% | 2569 fps | 95.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,634 psi | 54% | 1516 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 48,283 psi | 80% | 2575 fps | 99.6% |
| IMR 4198 | <<locked>> | 94% | 53,548 psi | 89% | 2516 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 53,983 psi | 90% | 2454 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 54,114 psi | 90% | 2582 fps | 97.1% |
| Lovex D073.4 | <<locked>> | 88% | 51,024 psi | 85% | 2543 fps | 98.1% |
| Lovex D073.5 | <<locked>> | 96% | 54,143 psi | 90% | 2579 fps | 98% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 47,935 psi | 80% | 2539 fps | 97.7% |
| Lovex S053 | <<locked>> | 84% | 52,663 psi | 87% | 2408 fps | 100% |
| Norma 200 | <<locked>> | 90% | 52,388 psi | 87% | 2526 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 49,327 psi | 82% | 2513 fps | 96.3% |
| Norma 202ᴾ | <<locked>> | 100% | 49,139 psi | 82% | 2533 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,721 psi | 54% | 1552 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 53,838 psi | 89% | 2487 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 54,215 psi | 90% | 2582 fps | 98.4% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 53,679 psi | 89% | 2566 fps | 99% |
| Shooters World AR Plus | <<locked>> | 88% | 51,024 psi | 85% | 2543 fps | 98.1% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 47,935 psi | 80% | 2539 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 52,025 psi | 86% | 2510 fps | 96.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 53,171 psi | 88% | 2274 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 53,737 psi | 89% | 2592 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 53,519 psi | 89% | 2556 fps | 99.9% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 52,968 psi | 88% | 2497 fps | 98.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 42,395 psi | 70% | 2356 fps | 98.1% |
| Somchem S321 | <<locked>> | 96% | 51,779 psi | 86% | 2569 fps | 97% |
| Somchem S335ᴾ | <<locked>> | 100% | 51,082 psi | 85% | 2493 fps | 99.3% |
| Vihtavuori N120 | <<locked>> | 88% | 51,692 psi | 86% | 2444 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 52,779 psi | 88% | 2497 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 52,054 psi | 86% | 2497 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 43,961 psi | 73% | 2461 fps | 99.6% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 46,427 psi | 77% | 2467 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 98% | 51,387 psi | 85% | 2533 fps | 96.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 44,788 psi | 74% | 2457 fps | 97.6% |
| Winchester 748ᴾ | <<locked>> | 100% | 52,330 psi | 87% | 2615 fps | 97.7% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 44,715 psi | 74% | 2346 fps | 99.9% |
| Accurate 2015 | <<locked>> | 80% | 29,399 psi | 49% | 2119 fps | 96.2% |
| Accurate 2460 | <<locked>> | 84% | 36,013 psi | 60% | 2283 fps | 95.2% |
| Accurate 2495 | <<locked>> | 86% | 26,992 psi | 45% | 2129 fps | 95.6% |
| Accurate 2520 | <<locked>> | 90% | 38,174 psi | 63% | 2362 fps | 95.3% |
| Accurate 4064 | <<locked>> | 94% | 32,953 psi | 55% | 2283 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 38,174 psi | 63% | 2228 fps | 97.4% |
| Accurate LT-32 | <<locked>> | 80% | 38,537 psi | 64% | 2234 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 40,364 psi | 67% | 2320 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 35,795 psi | 59% | 2293 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 94% | 44,831 psi | 74% | 2438 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 27,093 psi | 45% | 2133 fps | 97.8% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 47,906 psi | 80% | 2569 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,982 psi | 56% | 2234 fps | 98.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 41,887 psi | 70% | 2329 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 36,318 psi | 60% | 2215 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 90% | 42,322 psi | 70% | 2352 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 94% | 41,742 psi | 69% | 2441 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 32,750 psi | 54% | 2224 fps | 95.4% |
| Hodgdon H335 | <<locked>> | 82% | 35,056 psi | 58% | 2277 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 42,047 psi | 70% | 2310 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 98% | 47,877 psi | 80% | 2523 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,018 psi | 40% | 1352 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 31,053 psi | 52% | 2238 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 35,636 psi | 59% | 2228 fps | 99.5% |
| IMR 4227 | <<locked>> | 80% | 47,718 psi | 79% | 2372 fps | 100% |
| IMR 8208 XBR | <<locked>> | 94% | 44,831 psi | 74% | 2438 fps | 95.1% |
| Lovex D073.4 | <<locked>> | 80% | 38,595 psi | 64% | 2333 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 88% | 40,843 psi | 68% | 2372 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 94% | 38,899 psi | 65% | 2388 fps | 95.5% |
| Lovex S053 | <<locked>> | 80% | 46,760 psi | 78% | 2329 fps | 100% |
| Norma 200 | <<locked>> | 80% | 38,406 psi | 64% | 2306 fps | 99.7% |
| Norma 201 | <<locked>> | 98% | 46,311 psi | 77% | 2464 fps | 95.6% |
| Norma 202 | <<locked>> | 90% | 35,897 psi | 60% | 2300 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,946 psi | 40% | 1381 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 47,819 psi | 79% | 2405 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 39,566 psi | 66% | 2346 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 86% | 35,563 psi | 59% | 2254 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 38,595 psi | 64% | 2333 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 94% | 38,899 psi | 65% | 2388 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 48,341 psi | 80% | 2454 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 43,192 psi | 72% | 2146 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,071 psi | 60% | 2293 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 34,621 psi | 58% | 2241 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 36,680 psi | 61% | 2231 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 33,330 psi | 55% | 2182 fps | 95.6% |
| Somchem S321 | <<locked>> | 92% | 45,324 psi | 75% | 2470 fps | 95.6% |
| Somchem S335 | <<locked>> | 86% | 33,605 psi | 56% | 2192 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 40,480 psi | 67% | 2287 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 32,721 psi | 54% | 2159 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 80% | 28,442 psi | 47% | 2070 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 84% | 26,774 psi | 44% | 2103 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 90% | 34,098 psi | 57% | 2241 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 94% | 45,049 psi | 75% | 2438 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 94% | 37,130 psi | 62% | 2316 fps | 95.5% |
| Winchester 748 | <<locked>> | 94% | 42,975 psi | 71% | 2461 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 87 powders for .307 Win. loaded with the .308 | 155gr | Sierra MatchKing. Hodgdon CFE223 delivers the highest muzzle velocity at 2,671 fps; across all powders the maximum-charge window runs from 1,516 fps to 2,671 fps. Accurate 2495 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2520, Accurate 4064 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, ADI AR 2208, Alliant Reloder- TS 15.5 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.