Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 88gr | Inceptor SRR bullet and 27 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-7, ADI AR 2207 and ReloadSwiss RS 36.
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% | 52,678 psi | 88% | 3406 fps | 99.1% |
| Accurate 2015ᴾ | <<locked>> | 100% | 40,437 psi | 67% | 3255 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 98% | 52,663 psi | 87% | 3392 fps | 97% |
| ADI AR 2205 | <<locked>> | 84% | 51,488 psi | 86% | 3291 fps | 100% |
| ADI AR 2207 | <<locked>> | 98% | 53,519 psi | 89% | 3527 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 53,200 psi | 88% | 3547 fps | 96.9% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 37,942 psi | 63% | 3281 fps | 97.7% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 47,326 psi | 79% | 3438 fps | 98.5% |
| Alliant Reloder-7 | <<locked>> | 96% | 53,098 psi | 88% | 3474 fps | 99.5% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 54,418 psi | 90% | 3425 fps | 97.7% |
| Hodgdon H4198 | <<locked>> | 94% | 51,416 psi | 85% | 3396 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,892 psi | 50% | 2146 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 49,850 psi | 83% | 3442 fps | 99.4% |
| IMR 4227 | <<locked>> | 90% | 51,358 psi | 85% | 3402 fps | 99.9% |
| Lovex D060 | <<locked>> | 84% | 51,895 psi | 86% | 3455 fps | 99.4% |
| Lovex S053 | <<locked>> | 92% | 52,373 psi | 87% | 3399 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 54,012 psi | 90% | 3547 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,370 psi | 49% | 2192 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 54,085 psi | 90% | 3488 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 51,895 psi | 86% | 3455 fps | 99.4% |
| Shooters World SOCOM | <<locked>> | 84% | 52,982 psi | 88% | 3415 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 96% | 53,142 psi | 88% | 3235 fps | 100% |
| SNPE Vectan SP 10ᴾ | <<locked>> | 100% | 53,708 psi | 89% | 3547 fps | 95.9% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 48,849 psi | 81% | 3445 fps | 97% |
| Vihtavuori N110 | <<locked>> | 86% | 51,605 psi | 86% | 3310 fps | 100% |
| Vihtavuori N120 | <<locked>> | 98% | 53,679 psi | 89% | 3471 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 45,818 psi | 76% | 3327 fps | 98% |
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% | 34,882 psi | 58% | 3025 fps | 95.2% |
| Accurate 2015 | <<locked>> | 98% | 37,985 psi | 63% | 3196 fps | 95% |
| Accurate LT-30 | <<locked>> | 94% | 46,398 psi | 77% | 3274 fps | 95.6% |
| ADI AR 2205 | <<locked>> | 80% | 45,643 psi | 76% | 3186 fps | 100% |
| ADI AR 2207 | 36.4 gr | 80% | 29,892 psi | 50% | 2999 fps | 97.5% |
| ADI AR 2219 | <<locked>> | 96% | 46,340 psi | 77% | 3412 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 96% | 33,286 psi | 55% | 3146 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 90% | 34,272 psi | 57% | 3133 fps | 95.1% |
| Alliant Reloder-7 | 38.7 gr | 82% | 33,939 psi | 56% | 3054 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 44,672 psi | 74% | 3245 fps | 95.6% |
| Hodgdon H4198 | <<locked>> | 92% | 48,428 psi | 80% | 3337 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,683 psi | 36% | 1919 fps | 100% |
| IMR 4198 | <<locked>> | 86% | 33,040 psi | 55% | 3038 fps | 95.5% |
| IMR 4227 | <<locked>> | 80% | 37,710 psi | 63% | 3117 fps | 98.4% |
| Lovex D060 | <<locked>> | 80% | 45,701 psi | 76% | 3330 fps | 98.6% |
| Lovex S053 | <<locked>> | 80% | 36,724 psi | 61% | 3087 fps | 99.9% |
| Norma 200 | <<locked>> | 84% | 31,865 psi | 53% | 3051 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,393 psi | 36% | 1965 fps | 100% |
| ReloadSwiss RS 36 | 37.9 gr | 80% | 36,724 psi | 61% | 3130 fps | 98.1% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 45,701 psi | 76% | 3330 fps | 98.6% |
| Shooters World SOCOM | <<locked>> | 80% | 46,296 psi | 77% | 3291 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 34,258 psi | 57% | 2894 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 49,879 psi | 83% | 3474 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 42,815 psi | 71% | 3317 fps | 95.5% |
| Vihtavuori N110 | <<locked>> | 80% | 43,091 psi | 72% | 3163 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 30,139 psi | 50% | 2969 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 92% | 35,549 psi | 59% | 3091 fps | 95.2% |
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 44 powders for .308 Win. Ackley Improved loaded with the .308 | 88gr | Inceptor SRR. ADI AR 2219 delivers the highest muzzle velocity at 3,547 fps; across all powders the maximum-charge window runs from 2,146 fps to 3,547 fps. Accurate 2015 gives the best case fill at 100 %, and 44 of the 44 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 88.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Accurate 2495 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. Alliant Reloder-7, ADI AR 2207, ReloadSwiss RS 36 rank at the top here: for .308 Win. Ackley Improved with the .308 | 88gr | Inceptor SRR they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2460, Accurate 2495, Accurate LT-32 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.