Load Specifications
Load data in caliber .307 Win. with .308 | 170gr | Geco PLUS bullet and 73 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>> | 84% | 53,969 psi | 90% | 2359 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 52,315 psi | 87% | 2411 fps | 100% |
| Accurate 2200 | <<locked>> | 88% | 54,172 psi | 90% | 2477 fps | 96% |
| Accurate 2230 | <<locked>> | 88% | 54,317 psi | 90% | 2487 fps | 96.4% |
| Accurate 2460 | <<locked>> | 94% | 54,433 psi | 90% | 2467 fps | 99.6% |
| Accurate 2495ᴾ | <<locked>> | 100% | 47,282 psi | 79% | 2405 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 51,401 psi | 85% | 2464 fps | 99.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 43,918 psi | 73% | 2379 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 88% | 51,721 psi | 86% | 2339 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 88% | 52,214 psi | 87% | 2352 fps | 99.1% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 54,447 psi | 90% | 2500 fps | 97% |
| ADI AR 2207 | <<locked>> | 86% | 52,228 psi | 87% | 2369 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 53,548 psi | 89% | 2474 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 98% | 54,346 psi | 90% | 2474 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 98% | 52,127 psi | 87% | 2480 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 52,054 psi | 86% | 2516 fps | 97.4% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 43,976 psi | 73% | 2369 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 92% | 52,837 psi | 88% | 2428 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 53,621 psi | 89% | 2382 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 53,490 psi | 89% | 2379 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 96% | 54,360 psi | 90% | 2431 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 98% | 51,851 psi | 86% | 2490 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 92% | 51,779 psi | 86% | 2451 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 92% | 52,837 psi | 88% | 2470 fps | 99.6% |
| Hodgdon H4198 | <<locked>> | 86% | 53,563 psi | 89% | 2379 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 98% | 51,459 psi | 85% | 2467 fps | 97.1% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 49,603 psi | 82% | 2480 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,098 psi | 55% | 1447 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 53,505 psi | 89% | 2474 fps | 97.3% |
| IMR 3031ᴾ | <<locked>> | 100% | 52,634 psi | 87% | 2516 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 54,041 psi | 90% | 2402 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 53,853 psi | 89% | 2333 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 49,168 psi | 82% | 2457 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 98% | 54,346 psi | 90% | 2474 fps | 98.1% |
| Lovex D073.4 | <<locked>> | 86% | 51,343 psi | 85% | 2431 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 94% | 54,302 psi | 90% | 2470 fps | 98.8% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 52,156 psi | 87% | 2487 fps | 99.1% |
| Lovex S053 | <<locked>> | 82% | 52,663 psi | 87% | 2287 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 52,982 psi | 88% | 2408 fps | 96.7% |
| Lovex S062ᴾ | <<locked>> | 100% | 47,137 psi | 78% | 2385 fps | 97% |
| Norma 200 | <<locked>> | 88% | 52,953 psi | 88% | 2408 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 53,330 psi | 89% | 2461 fps | 98.1% |
| Norma 202ᴾ | <<locked>> | 100% | 53,272 psi | 89% | 2477 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 98% | 53,809 psi | 89% | 2497 fps | 96.7% |
| Ramshot X-Terminator | <<locked>> | 94% | 53,069 psi | 88% | 2431 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,286 psi | 55% | 1483 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 53,722 psi | 89% | 2362 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 51,517 psi | 86% | 2431 fps | 98.8% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 42,134 psi | 70% | 2388 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 98% | 54,418 psi | 90% | 2461 fps | 99.6% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 50,125 psi | 83% | 2408 fps | 97.5% |
| Shooters World AR Plus | <<locked>> | 86% | 51,343 psi | 85% | 2431 fps | 98.9% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 52,156 psi | 87% | 2487 fps | 99.1% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 47,137 psi | 78% | 2385 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 52,083 psi | 87% | 2402 fps | 97.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 53,258 psi | 88% | 2156 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 54,041 psi | 90% | 2480 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 53,969 psi | 90% | 2444 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 52,866 psi | 88% | 2474 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 53,214 psi | 88% | 2388 fps | 99.5% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 45,861 psi | 76% | 2303 fps | 99.4% |
| Somchem S321 | <<locked>> | 94% | 52,301 psi | 87% | 2467 fps | 98.1% |
| Somchem S335 | <<locked>> | 98% | 51,735 psi | 86% | 2392 fps | 99.8% |
| Somchem S341 | <<locked>> | 98% | 52,156 psi | 87% | 2451 fps | 96.3% |
| Vihtavuori N120 | <<locked>> | 86% | 52,257 psi | 87% | 2326 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 53,142 psi | 88% | 2382 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 52,504 psi | 87% | 2388 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 48,080 psi | 80% | 2402 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 50,372 psi | 84% | 2415 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 96% | 51,576 psi | 86% | 2428 fps | 97.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 48,660 psi | 81% | 2405 fps | 99% |
| Winchester 748 | <<locked>> | 98% | 52,881 psi | 88% | 2510 fps | 98.7% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 52,257 psi | 87% | 2484 fps | 97.1% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 47,601 psi | 79% | 2277 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 31,763 psi | 53% | 2073 fps | 98% |
| Accurate 2200 | <<locked>> | 86% | 50,749 psi | 84% | 2428 fps | 95.2% |
| Accurate 2230 | <<locked>> | 86% | 50,836 psi | 84% | 2434 fps | 95.7% |
| Accurate 2460 | <<locked>> | 80% | 34,084 psi | 57% | 2139 fps | 95.7% |
| Accurate 2495 | <<locked>> | 80% | 24,337 psi | 40% | 1959 fps | 95.5% |
| Accurate 2520 | <<locked>> | 84% | 34,026 psi | 57% | 2175 fps | 95.2% |
| Accurate 4064 | <<locked>> | 88% | 29,834 psi | 50% | 2106 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 40,495 psi | 67% | 2169 fps | 98.8% |
| Accurate LT-32 | <<locked>> | 80% | 40,872 psi | 68% | 2175 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 96% | 48,066 psi | 80% | 2408 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 80% | 43,207 psi | 72% | 2247 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 38,203 psi | 63% | 2238 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 88% | 40,059 psi | 67% | 2251 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 29,225 psi | 49% | 2090 fps | 99.3% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 42,728 psi | 71% | 2369 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 41,263 psi | 69% | 2323 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,550 psi | 61% | 2175 fps | 99.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 44,657 psi | 74% | 2260 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,812 psi | 64% | 2162 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 37,927 psi | 63% | 2169 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 90% | 39,755 psi | 66% | 2300 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 35,230 psi | 59% | 2178 fps | 97.4% |
| Hodgdon H335 | <<locked>> | 80% | 35,462 psi | 59% | 2188 fps | 96.4% |
| Hodgdon H4198 | <<locked>> | 80% | 44,585 psi | 74% | 2247 fps | 99% |
| Hodgdon H4895 | <<locked>> | 92% | 42,917 psi | 71% | 2329 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 43,453 psi | 72% | 2379 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,656 psi | 41% | 1293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 44,280 psi | 74% | 2333 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 27,833 psi | 46% | 2060 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 37,942 psi | 63% | 2165 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 50,459 psi | 84% | 2290 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 46,166 psi | 77% | 2411 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 88% | 40,059 psi | 67% | 2251 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 41,785 psi | 69% | 2287 fps | 97.3% |
| Lovex D073.5 | <<locked>> | 82% | 36,318 psi | 60% | 2185 fps | 95% |
| Lovex D073.6 | <<locked>> | 88% | 34,722 psi | 58% | 2201 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 49,400 psi | 82% | 2244 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 46,862 psi | 78% | 2316 fps | 95.3% |
| Lovex S062 | <<locked>> | 96% | 41,785 psi | 69% | 2300 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 41,321 psi | 69% | 2244 fps | 100% |
| Norma 201 | <<locked>> | 92% | 41,713 psi | 69% | 2280 fps | 95.6% |
| Norma 202 | <<locked>> | 84% | 32,097 psi | 53% | 2116 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 94% | 47,065 psi | 78% | 2398 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 90% | 46,992 psi | 78% | 2343 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,627 psi | 41% | 1325 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 50,836 psi | 84% | 2326 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 34,882 psi | 58% | 2149 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 39,566 psi | 66% | 2336 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 82% | 34,040 psi | 57% | 2119 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 94% | 41,742 psi | 69% | 2274 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 41,785 psi | 69% | 2287 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 34,722 psi | 58% | 2201 fps | 95.4% |
| Shooters World Precision | <<locked>> | 96% | 41,785 psi | 69% | 2300 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 42,612 psi | 71% | 2260 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 45,353 psi | 75% | 2064 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,943 psi | 65% | 2244 fps | 97.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,217 psi | 62% | 2185 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 46,717 psi | 78% | 2382 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 32,590 psi | 54% | 2051 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 29,733 psi | 49% | 2008 fps | 95.5% |
| Somchem S321 | <<locked>> | 86% | 40,059 psi | 67% | 2274 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 29,979 psi | 50% | 2011 fps | 95.4% |
| Somchem S341 | <<locked>> | 96% | 48,544 psi | 81% | 2398 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 43,323 psi | 72% | 2211 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 35,027 psi | 58% | 2103 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 80% | 30,501 psi | 51% | 2024 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 80% | 25,614 psi | 43% | 1975 fps | 95.8% |
| Vihtavuori N140 | <<locked>> | 84% | 30,429 psi | 51% | 2064 fps | 95% |
| Vihtavuori N530 | <<locked>> | 88% | 39,740 psi | 66% | 2241 fps | 95% |
| Vihtavuori N540 | <<locked>> | 88% | 33,098 psi | 55% | 2136 fps | 95.4% |
| Winchester 748 | <<locked>> | 88% | 38,276 psi | 64% | 2270 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 96% | 45,658 psi | 76% | 2385 fps | 95.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 93 powders for .307 Win. loaded with the .308 | 170gr | Geco PLUS. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,523 fps; across all powders the maximum-charge window runs from 1,447 fps to 2,523 fps. Accurate 2495 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2206H 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, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder-17 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.