Load Specifications
Load data in caliber .308 Win. Ackley Improved with .311 | 90gr | Inceptor SRR bullet and 28 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, ReloadSwiss RS 36 and Norma 200.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 92% | 53,098 psi | 88% | 3379 fps | 99.2% |
| Accurate 2015ᴾ | <<locked>> | 100% | 41,307 psi | 69% | 3245 fps | 96.3% |
| Accurate LT-30 | <<locked>> | 98% | 53,084 psi | 88% | 3369 fps | 97.3% |
| ADI AR 2205 | <<locked>> | 84% | 52,127 psi | 87% | 3264 fps | 100% |
| ADI AR 2207 | <<locked>> | 98% | 54,447 psi | 90% | 3504 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 54,244 psi | 90% | 3533 fps | 97.3% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 38,406 psi | 64% | 3264 fps | 98% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 47,877 psi | 80% | 3415 fps | 98.8% |
| Alliant Reloder-7 | <<locked>> | 96% | 53,606 psi | 89% | 3451 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 51,619 psi | 86% | 3346 fps | 97.4% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 48,182 psi | 80% | 3419 fps | 96% |
| Hodgdon H4198 | <<locked>> | 94% | 52,170 psi | 87% | 3379 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,168 psi | 50% | 2126 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 50,647 psi | 84% | 3422 fps | 99.6% |
| IMR 4227 | <<locked>> | 90% | 52,054 psi | 86% | 3379 fps | 100% |
| Lovex D060 | <<locked>> | 84% | 52,185 psi | 87% | 3428 fps | 99.5% |
| Lovex S053 | <<locked>> | 92% | 53,156 psi | 88% | 3376 fps | 100% |
| Norma 200 | <<locked>> | 98% | 51,430 psi | 85% | 3468 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,660 psi | 49% | 2172 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 51,401 psi | 85% | 3409 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 52,185 psi | 87% | 3428 fps | 99.5% |
| Shooters World SOCOM | <<locked>> | 84% | 53,751 psi | 89% | 3392 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 96% | 53,795 psi | 89% | 3209 fps | 100% |
| SNPE Vectan SP 10ᴾ | <<locked>> | 100% | 54,375 psi | 90% | 3527 fps | 96.3% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 49,342 psi | 82% | 3422 fps | 97.3% |
| Vihtavuori N110 | <<locked>> | 86% | 52,330 psi | 87% | 3284 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 51,314 psi | 85% | 3399 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 46,311 psi | 77% | 3304 fps | 98.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 35,433 psi | 59% | 3009 fps | 95.6% |
| Accurate 2015 | <<locked>> | 98% | 38,450 psi | 64% | 3179 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 92% | 44,063 psi | 73% | 3196 fps | 95.3% |
| ADI AR 2205 | <<locked>> | 80% | 46,151 psi | 77% | 3163 fps | 100% |
| ADI AR 2207 | 36.3 gr | 80% | 30,385 psi | 50% | 2982 fps | 97.8% |
| ADI AR 2219 | <<locked>> | 96% | 47,181 psi | 78% | 3399 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 94% | 31,647 psi | 53% | 3068 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 90% | 34,679 psi | 58% | 3114 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 32,126 psi | 53% | 2972 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 42,351 psi | 70% | 3169 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 98% | 45,295 psi | 75% | 3360 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 90% | 45,992 psi | 76% | 3258 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,886 psi | 36% | 1903 fps | 100% |
| IMR 4198 | <<locked>> | 84% | 31,531 psi | 52% | 2963 fps | 95.1% |
| IMR 4227 | <<locked>> | 80% | 38,261 psi | 64% | 3097 fps | 98.7% |
| Lovex D060 | <<locked>> | 80% | 46,267 psi | 77% | 3307 fps | 98.9% |
| Lovex S053 | <<locked>> | 80% | 36,999 psi | 61% | 3061 fps | 99.9% |
| Norma 200 | 39.9 gr | 84% | 32,227 psi | 54% | 3031 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,408 psi | 36% | 1939 fps | 100% |
| ReloadSwiss RS 36 | 37.8 gr | 80% | 37,289 psi | 62% | 3114 fps | 98.4% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 46,267 psi | 77% | 3307 fps | 98.9% |
| Shooters World SOCOM | <<locked>> | 80% | 46,949 psi | 78% | 3268 fps | 99.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 34,708 psi | 58% | 2871 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 50,807 psi | 84% | 3461 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 40,973 psi | 68% | 3245 fps | 95.2% |
| Vihtavuori N110 | <<locked>> | 80% | 43,685 psi | 73% | 3140 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 30,618 psi | 51% | 2953 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 92% | 36,187 psi | 60% | 3077 fps | 95.7% |
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 28 powders for .308 Win. Ackley Improved loaded with the .311 | 90gr | Inceptor SRR. ADI AR 2219 delivers the highest muzzle velocity at 3,533 fps; across all powders the maximum-charge window runs from 2,126 fps to 3,533 fps. Accurate 2015 gives the best case fill at 100 %, and 28 of the 28 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.311" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, ADI AR 2219, Alliant AR-Comp 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 2207, ReloadSwiss RS 36, Norma 200 rank at the top here: for .308 Win. Ackley Improved with the .311 | 90gr | Inceptor SRR 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.