Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 135gr | IBEX Viper bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Winchester 748 and Hodgdon BL-C2.
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>> | 82% | 51,924 psi | 86% | 2766 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 54,128 psi | 90% | 2874 fps | 100% |
| Accurate 2460 | <<locked>> | 92% | 53,098 psi | 88% | 2887 fps | 99.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 50,038 psi | 83% | 2877 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 53,185 psi | 88% | 2933 fps | 99% |
| Accurate 4064ᴾ | <<locked>> | 100% | 46,354 psi | 77% | 2844 fps | 99% |
| Accurate LT-30 | <<locked>> | 88% | 52,518 psi | 87% | 2782 fps | 99.8% |
| Accurate LT-32 | <<locked>> | 88% | 52,881 psi | 88% | 2792 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 98% | 52,692 psi | 88% | 2920 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 86% | 53,301 psi | 89% | 2825 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 51,111 psi | 85% | 2890 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 96% | 52,504 psi | 87% | 2887 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 98% | 52,997 psi | 88% | 2946 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 52,910 psi | 88% | 2986 fps | 97.1% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 45,469 psi | 76% | 2822 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 90% | 51,343 psi | 85% | 2851 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 84% | 51,750 psi | 86% | 2795 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,155 psi | 85% | 2776 fps | 99.8% |
| Bofors RP3ᴾ | <<locked>> | 100% | 45,194 psi | 75% | 2828 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 94% | 52,228 psi | 87% | 2838 fps | 98% |
| Hodgdon BL-C2 | <<locked>> | 98% | 53,388 psi | 89% | 2963 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 92% | 52,953 psi | 88% | 2917 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 92% | 54,085 psi | 90% | 2940 fps | 99.5% |
| Hodgdon H4198 | <<locked>> | 86% | 54,302 psi | 90% | 2828 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 98% | 52,982 psi | 88% | 2933 fps | 96.9% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 50,952 psi | 85% | 2946 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,736 psi | 56% | 1749 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 51,445 psi | 85% | 2887 fps | 96.5% |
| IMR 3031ᴾ | <<locked>> | 100% | 53,838 psi | 89% | 2992 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 51,895 psi | 86% | 2818 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 50,647 psi | 84% | 2923 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 96% | 52,504 psi | 87% | 2887 fps | 97.5% |
| Lovex D073.4 | <<locked>> | 86% | 53,113 psi | 88% | 2900 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 92% | 52,823 psi | 88% | 2887 fps | 98.3% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 53,925 psi | 90% | 2956 fps | 99.1% |
| Lovex S053 | <<locked>> | 82% | 53,664 psi | 89% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 54,157 psi | 90% | 2858 fps | 96.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 49,066 psi | 82% | 2844 fps | 97% |
| Norma 200 | <<locked>> | 86% | 52,011 psi | 86% | 2835 fps | 100% |
| Norma 201 | <<locked>> | 98% | 51,924 psi | 86% | 2877 fps | 97.4% |
| Norma 202 | <<locked>> | 98% | 51,503 psi | 86% | 2897 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 96% | 51,561 psi | 86% | 2904 fps | 95.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,881 psi | 56% | 1788 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 52,707 psi | 88% | 2894 fps | 98.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 43,903 psi | 73% | 2848 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 96% | 53,708 psi | 89% | 2887 fps | 99.3% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 52,199 psi | 87% | 2871 fps | 97.4% |
| Shooters World AR Plus | <<locked>> | 86% | 53,113 psi | 88% | 2900 fps | 98.8% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 53,925 psi | 90% | 2956 fps | 99.1% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 49,066 psi | 82% | 2844 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 53,156 psi | 88% | 2851 fps | 97.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 54,085 psi | 90% | 2575 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 52,025 psi | 86% | 2897 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 51,721 psi | 86% | 2858 fps | 99.9% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 54,114 psi | 90% | 2936 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 51,605 psi | 86% | 2799 fps | 99.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 46,963 psi | 78% | 2740 fps | 99.3% |
| Somchem S321 | <<locked>> | 94% | 53,534 psi | 89% | 2927 fps | 97.9% |
| Somchem S335 | <<locked>> | 98% | 53,243 psi | 88% | 2844 fps | 99.7% |
| Somchem S341 | <<locked>> | 98% | 53,243 psi | 88% | 2904 fps | 96% |
| Vihtavuori N120 | <<locked>> | 86% | 53,171 psi | 88% | 2776 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 51,634 psi | 86% | 2795 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 53,838 psi | 89% | 2841 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 49,313 psi | 82% | 2861 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 51,619 psi | 86% | 2867 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 96% | 53,200 psi | 88% | 2890 fps | 97.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 49,995 psi | 83% | 2861 fps | 99% |
| Winchester 748 | <<locked>> | 98% | 54,317 psi | 90% | 2982 fps | 98.6% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 53,374 psi | 89% | 2943 fps | 96.9% |
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% | 48,602 psi | 81% | 2713 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 33,895 psi | 56% | 2503 fps | 98.2% |
| Accurate 2460 | <<locked>> | 80% | 36,434 psi | 61% | 2579 fps | 96% |
| Accurate 2495 | <<locked>> | 80% | 27,354 psi | 45% | 2398 fps | 96.4% |
| Accurate 2520 | <<locked>> | 84% | 36,100 psi | 60% | 2615 fps | 95.4% |
| Accurate 4064 | <<locked>> | 88% | 32,619 psi | 54% | 2552 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 41,785 psi | 69% | 2595 fps | 98.7% |
| Accurate LT-32 | <<locked>> | 80% | 42,090 psi | 70% | 2602 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 96% | 49,690 psi | 83% | 2867 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 44,686 psi | 74% | 2694 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 39,595 psi | 66% | 2677 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 90% | 43,859 psi | 73% | 2733 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 30,879 psi | 51% | 2516 fps | 99.4% |
| Alliant Power Pro 1200-R | 39.5 gr | 86% | 44,092 psi | 73% | 2825 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 42,960 psi | 71% | 2772 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,508 psi | 64% | 2621 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,064 psi | 77% | 2700 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,059 psi | 67% | 2579 fps | 98.6% |
| Bofors RP3 | <<locked>> | 98% | 42,482 psi | 71% | 2776 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 84% | 39,407 psi | 65% | 2595 fps | 95% |
| Hodgdon BL-C2 | 44 gr | 90% | 41,307 psi | 69% | 2746 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 36,579 psi | 61% | 2608 fps | 97.4% |
| Hodgdon H335 | <<locked>> | 80% | 37,115 psi | 62% | 2621 fps | 96.5% |
| Hodgdon H4198 | <<locked>> | 80% | 45,788 psi | 76% | 2687 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 94% | 47,181 psi | 78% | 2831 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 44,904 psi | 75% | 2831 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,150 psi | 42% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 45,513 psi | 76% | 2779 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 29,689 psi | 49% | 2487 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 39,030 psi | 65% | 2592 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 47,718 psi | 79% | 2874 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 90% | 43,859 psi | 73% | 2733 fps | 95.6% |
| Lovex D073.4 | <<locked>> | 80% | 43,685 psi | 73% | 2736 fps | 97.2% |
| Lovex D073.5 | <<locked>> | 82% | 38,450 psi | 64% | 2621 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 88% | 36,738 psi | 61% | 2641 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 50,618 psi | 84% | 2687 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 48,254 psi | 80% | 2759 fps | 95.1% |
| Lovex S062 | <<locked>> | 94% | 41,220 psi | 68% | 2697 fps | 95% |
| Norma 200 | <<locked>> | 80% | 43,642 psi | 73% | 2694 fps | 100% |
| Norma 201 | <<locked>> | 92% | 43,584 psi | 72% | 2726 fps | 95.6% |
| Norma 202 | <<locked>> | 84% | 33,852 psi | 56% | 2546 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 94% | 48,312 psi | 80% | 2848 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,150 psi | 42% | 1598 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,637 psi | 61% | 2582 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 41,220 psi | 68% | 2785 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 34,650 psi | 58% | 2510 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 94% | 43,859 psi | 73% | 2723 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 43,685 psi | 73% | 2736 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 36,738 psi | 61% | 2641 fps | 95.6% |
| Shooters World Precision | <<locked>> | 94% | 41,220 psi | 68% | 2697 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 43,976 psi | 73% | 2694 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,398 psi | 77% | 2470 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,509 psi | 67% | 2687 fps | 97.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,363 psi | 64% | 2615 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 47,877 psi | 80% | 2831 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 34,403 psi | 57% | 2467 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 31,343 psi | 52% | 2415 fps | 95.6% |
| Somchem S321 | <<locked>> | 86% | 41,669 psi | 69% | 2713 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 31,966 psi | 53% | 2428 fps | 95.7% |
| Somchem S341 | <<locked>> | 96% | 49,893 psi | 83% | 2848 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 44,643 psi | 74% | 2648 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,535 psi | 61% | 2523 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 80% | 31,952 psi | 53% | 2431 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 80% | 27,456 psi | 46% | 2388 fps | 96.2% |
| Vihtavuori N140 | <<locked>> | 84% | 32,285 psi | 54% | 2484 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 90% | 44,135 psi | 73% | 2736 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 88% | 34,998 psi | 58% | 2566 fps | 95.6% |
| Winchester 748 | 42.3 gr | 88% | 39,740 psi | 66% | 2710 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 96% | 47,094 psi | 78% | 2838 fps | 95.6% |
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 69 powders for .308 Win. Ackley Improved loaded with the .308 | 135gr | IBEX Viper. IMR 3031 delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,992 fps. Accurate 2495 gives the best case fill at 100 %, and 69 of the 69 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 135.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Alliant Reloder- TS 15.5 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 Power Pro 1200-R, Winchester 748, Hodgdon BL-C2 rank at the top here: for .308 Win. Ackley Improved with the .308 | 135gr | IBEX Viper 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.