Load Specifications
Load data in caliber .307 Win. with .308 | 165gr | Speer Grand Slam bullet and 68 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% | 53,214 psi | 88% | 2392 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 51,343 psi | 85% | 2441 fps | 100% |
| Accurate 2230 | <<locked>> | 88% | 53,693 psi | 89% | 2516 fps | 96% |
| Accurate 2460 | <<locked>> | 94% | 53,330 psi | 89% | 2493 fps | 99.3% |
| Accurate 2495ᴾ | <<locked>> | 100% | 46,137 psi | 77% | 2428 fps | 100% |
| Accurate 2520 | <<locked>> | 98% | 54,070 psi | 90% | 2539 fps | 99.2% |
| Accurate 4064ᴾ | <<locked>> | 100% | 42,830 psi | 71% | 2398 fps | 98.5% |
| Accurate LT-30 | <<locked>> | 90% | 53,940 psi | 90% | 2405 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 90% | 54,404 psi | 90% | 2418 fps | 99.2% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 53,824 psi | 89% | 2530 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 86% | 51,140 psi | 85% | 2398 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 52,547 psi | 87% | 2500 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 98% | 53,693 psi | 89% | 2503 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 98% | 50,995 psi | 85% | 2507 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 54,404 psi | 90% | 2592 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 92% | 51,982 psi | 86% | 2457 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 52,837 psi | 88% | 2415 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 52,576 psi | 87% | 2405 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 96% | 53,490 psi | 89% | 2457 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 98% | 51,039 psi | 85% | 2520 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 94% | 54,302 psi | 90% | 2523 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 92% | 52,170 psi | 87% | 2503 fps | 99.4% |
| Hodgdon H4198 | <<locked>> | 86% | 52,910 psi | 88% | 2408 fps | 99.7% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 54,099 psi | 90% | 2543 fps | 97.2% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 48,544 psi | 81% | 2500 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,938 psi | 55% | 1470 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 52,460 psi | 87% | 2497 fps | 96.8% |
| IMR 3031ᴾ | <<locked>> | 100% | 51,445 psi | 85% | 2543 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 53,258 psi | 88% | 2431 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 52,910 psi | 88% | 2362 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 53,693 psi | 89% | 2503 fps | 97.8% |
| Lovex D073.4 | <<locked>> | 88% | 54,259 psi | 90% | 2510 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 94% | 53,534 psi | 89% | 2500 fps | 98.5% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 51,358 psi | 85% | 2513 fps | 98.9% |
| Lovex S053 | <<locked>> | 82% | 51,779 psi | 86% | 2316 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 52,083 psi | 87% | 2431 fps | 96.2% |
| Lovex S062ᴾ | <<locked>> | 100% | 46,543 psi | 77% | 2415 fps | 96.5% |
| Norma 200 | <<locked>> | 88% | 52,098 psi | 87% | 2441 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 52,330 psi | 87% | 2484 fps | 97.6% |
| Norma 202ᴾ | <<locked>> | 100% | 52,185 psi | 87% | 2500 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 98% | 52,649 psi | 87% | 2520 fps | 96.2% |
| Ramshot X-Terminator | <<locked>> | 94% | 52,475 psi | 87% | 2461 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,069 psi | 55% | 1509 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 53,084 psi | 88% | 2398 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 53,838 psi | 89% | 2503 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 98% | 53,374 psi | 89% | 2487 fps | 99.4% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 49,153 psi | 82% | 2431 fps | 97% |
| Shooters World AR Plus | <<locked>> | 88% | 54,259 psi | 90% | 2510 fps | 99.1% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 51,358 psi | 85% | 2513 fps | 98.9% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 46,543 psi | 77% | 2415 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 51,111 psi | 85% | 2428 fps | 96.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 52,460 psi | 87% | 2188 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 53,040 psi | 88% | 2507 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 53,127 psi | 88% | 2474 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 52,185 psi | 87% | 2503 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 52,359 psi | 87% | 2418 fps | 99.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 44,962 psi | 75% | 2326 fps | 99.1% |
| Somchem S321 | <<locked>> | 94% | 51,242 psi | 85% | 2490 fps | 97.7% |
| Somchem S335ᴾ | <<locked>> | 100% | 53,954 psi | 90% | 2457 fps | 99.8% |
| Vihtavuori N120 | <<locked>> | 86% | 51,126 psi | 85% | 2356 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 52,301 psi | 87% | 2411 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 51,576 psi | 86% | 2415 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 47,065 psi | 78% | 2431 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 49,327 psi | 82% | 2438 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 98% | 54,360 psi | 90% | 2503 fps | 97.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 47,630 psi | 79% | 2428 fps | 98.7% |
| Winchester 748 | <<locked>> | 98% | 52,170 psi | 87% | 2539 fps | 98.4% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 51,082 psi | 85% | 2503 fps | 96.6% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 46,920 psi | 78% | 2306 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 31,328 psi | 52% | 2100 fps | 97.6% |
| Accurate 2230 | <<locked>> | 86% | 49,835 psi | 83% | 2461 fps | 95.1% |
| Accurate 2460 | <<locked>> | 80% | 33,504 psi | 56% | 2162 fps | 95.1% |
| Accurate 2495 | <<locked>> | 82% | 25,498 psi | 42% | 2024 fps | 95.7% |
| Accurate 2520 | <<locked>> | 86% | 35,607 psi | 59% | 2241 fps | 95.4% |
| Accurate 4064 | <<locked>> | 90% | 31,183 psi | 52% | 2172 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 40,045 psi | 67% | 2195 fps | 98.5% |
| Accurate LT-32 | <<locked>> | 80% | 40,393 psi | 67% | 2201 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 96% | 47,500 psi | 79% | 2434 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 42,714 psi | 71% | 2280 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 37,637 psi | 63% | 2260 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 90% | 41,887 psi | 70% | 2320 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 28,543 psi | 47% | 2106 fps | 99% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 44,788 psi | 74% | 2441 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,042 psi | 60% | 2205 fps | 99.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 43,729 psi | 73% | 2283 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,261 psi | 64% | 2185 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 39,755 psi | 66% | 2238 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 90% | 38,914 psi | 65% | 2320 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 34,679 psi | 58% | 2201 fps | 97% |
| Hodgdon H335 | <<locked>> | 80% | 34,882 psi | 58% | 2208 fps | 95.9% |
| Hodgdon H4198 | <<locked>> | 80% | 44,121 psi | 73% | 2277 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 94% | 44,817 psi | 74% | 2398 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 45,614 psi | 76% | 2454 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,265 psi | 40% | 1309 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 46,238 psi | 77% | 2402 fps | 95.4% |
| IMR 3031 | <<locked>> | 82% | 29,269 psi | 49% | 2129 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 37,536 psi | 62% | 2195 fps | 99.9% |
| IMR 4227 | <<locked>> | 80% | 49,951 psi | 83% | 2323 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 41,887 psi | 70% | 2320 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 41,060 psi | 68% | 2310 fps | 96.8% |
| Lovex D073.5 | <<locked>> | 84% | 37,956 psi | 63% | 2251 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 90% | 36,593 psi | 61% | 2274 fps | 95.7% |
| Lovex S053 | <<locked>> | 80% | 48,936 psi | 81% | 2280 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 49,008 psi | 81% | 2388 fps | 95.5% |
| Lovex S062 | <<locked>> | 96% | 41,002 psi | 68% | 2320 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 40,683 psi | 68% | 2270 fps | 100% |
| Norma 201 | <<locked>> | 92% | 40,930 psi | 68% | 2303 fps | 95% |
| Norma 202 | <<locked>> | 86% | 33,634 psi | 56% | 2185 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 96% | 49,414 psi | 82% | 2470 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 92% | 49,023 psi | 81% | 2408 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,540 psi | 41% | 1348 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 49,835 psi | 83% | 2356 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 36,622 psi | 61% | 2221 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 82% | 33,533 psi | 56% | 2142 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 94% | 41,031 psi | 68% | 2297 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 41,060 psi | 68% | 2310 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 36,593 psi | 61% | 2274 fps | 95.7% |
| Shooters World Precision | <<locked>> | 96% | 41,002 psi | 68% | 2320 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 44,614 psi | 74% | 2329 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 45,092 psi | 75% | 2096 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,276 psi | 64% | 2267 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,680 psi | 61% | 2211 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 48,646 psi | 81% | 2451 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 34,330 psi | 57% | 2119 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 31,241 psi | 52% | 2073 fps | 95.7% |
| Somchem S321 | <<locked>> | 88% | 41,771 psi | 69% | 2339 fps | 95.5% |
| Somchem S335 | <<locked>> | 82% | 31,430 psi | 52% | 2080 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 42,757 psi | 71% | 2244 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 34,621 psi | 58% | 2133 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 80% | 30,081 psi | 50% | 2047 fps | 97% |
| Vihtavuori N135 | <<locked>> | 80% | 25,208 psi | 42% | 1998 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 86% | 31,865 psi | 53% | 2129 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 90% | 41,989 psi | 70% | 2316 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 90% | 34,853 psi | 58% | 2205 fps | 95.7% |
| Winchester 748 | <<locked>> | 90% | 39,943 psi | 66% | 2339 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 96% | 44,672 psi | 74% | 2405 fps | 95% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 90 powders for .307 Win. loaded with the .308 | 165gr | Speer Grand Slam. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,592 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,592 fps. Accurate 2495 gives the best case fill at 100 %, and 90 of the 90 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 165.0 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-15 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.