Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 153gr | TWENTY-NINE SILENTIO bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 1200-R and Winchester 748.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 52,939 psi | 88% | 2628 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 51,634 psi | 86% | 2687 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 53,316 psi | 89% | 2769 fps | 96.9% |
| Accurate 2230 | <<locked>> | 86% | 53,635 psi | 89% | 2776 fps | 97.3% |
| Accurate 2460 | <<locked>> | 92% | 53,911 psi | 90% | 2753 fps | 99.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 50,314 psi | 84% | 2730 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 50,908 psi | 85% | 2749 fps | 99.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 46,659 psi | 78% | 2707 fps | 99.7% |
| Accurate LT-30 | <<locked>> | 88% | 53,824 psi | 89% | 2651 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 54,230 psi | 90% | 2667 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 98% | 54,012 psi | 90% | 2795 fps | 97.9% |
| ADI AR 2207 | <<locked>> | 86% | 54,375 psi | 90% | 2677 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 48,646 psi | 81% | 2684 fps | 96% |
| ADI AR 2219 | <<locked>> | 88% | 52,924 psi | 88% | 2759 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 53,766 psi | 89% | 2762 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 96% | 51,750 psi | 86% | 2762 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 51,358 psi | 85% | 2812 fps | 98.1% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 53,882 psi | 90% | 2881 fps | 96.7% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 46,659 psi | 78% | 2703 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 90% | 52,301 psi | 87% | 2710 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 50,937 psi | 85% | 2769 fps | 96.9% |
| Alliant Reloder-7 | <<locked>> | 84% | 52,446 psi | 87% | 2651 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 52,344 psi | 87% | 2644 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 53,824 psi | 89% | 2805 fps | 96.7% |
| Bofors RP3ᴾ | <<locked>> | 100% | 46,282 psi | 77% | 2707 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 94% | 53,592 psi | 89% | 2717 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 96% | 51,909 psi | 86% | 2789 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 94% | 53,940 psi | 90% | 2874 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 92% | 54,462 psi | 90% | 2782 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 52,373 psi | 87% | 2759 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 84% | 52,344 psi | 87% | 2648 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 54,331 psi | 90% | 2808 fps | 98.4% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 52,649 psi | 87% | 2831 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,373 psi | 55% | 1637 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 53,026 psi | 88% | 2766 fps | 98.1% |
| IMR 3031 | <<locked>> | 98% | 52,315 psi | 87% | 2808 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 51,184 psi | 85% | 2720 fps | 96.9% |
| IMR 4198 | <<locked>> | 90% | 53,359 psi | 89% | 2677 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 52,156 psi | 87% | 2805 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 96% | 53,766 psi | 89% | 2762 fps | 98.8% |
| Lovex D073.4 | <<locked>> | 86% | 54,447 psi | 90% | 2769 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 92% | 53,737 psi | 89% | 2756 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 98% | 52,127 psi | 87% | 2779 fps | 99.6% |
| Lovex S053 | <<locked>> | 82% | 54,389 psi | 90% | 2582 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 52,069 psi | 87% | 2687 fps | 97.5% |
| Lovex S062ᴾ | <<locked>> | 100% | 50,009 psi | 83% | 2720 fps | 98.4% |
| Norma 200 | <<locked>> | 86% | 52,199 psi | 87% | 2684 fps | 100% |
| Norma 201 | <<locked>> | 98% | 52,576 psi | 87% | 2746 fps | 98.7% |
| Norma 202 | <<locked>> | 98% | 52,808 psi | 88% | 2766 fps | 99.9% |
| Norma 203Bᴾ | <<locked>> | 100% | 49,937 psi | 83% | 2759 fps | 97.2% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 50,778 psi | 84% | 2782 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 96% | 53,243 psi | 88% | 2789 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 92% | 52,475 psi | 87% | 2720 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,475 psi | 56% | 1677 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 53,925 psi | 90% | 2762 fps | 99.6% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 53,751 psi | 89% | 2881 fps | 97.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 44,469 psi | 74% | 2740 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 96% | 53,780 psi | 89% | 2746 fps | 99.9% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 52,881 psi | 88% | 2743 fps | 98.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 42,859 psi | 71% | 2638 fps | 96.4% |
| Shooters World AR Plus | <<locked>> | 86% | 54,447 psi | 90% | 2769 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 98% | 52,127 psi | 87% | 2779 fps | 99.6% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 50,009 psi | 83% | 2720 fps | 98.4% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 51,111 psi | 85% | 2680 fps | 98.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 52,112 psi | 87% | 2398 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 53,272 psi | 89% | 2766 fps | 99.9% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 45,658 psi | 76% | 2700 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 53,359 psi | 89% | 2723 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 52,576 psi | 87% | 2769 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 52,446 psi | 87% | 2667 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 48,385 psi | 80% | 2618 fps | 99.9% |
| Somchem S321 | <<locked>> | 92% | 51,692 psi | 86% | 2753 fps | 98.8% |
| Somchem S335 | <<locked>> | 98% | 54,143 psi | 90% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 51,387 psi | 85% | 2733 fps | 97.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 44,324 psi | 74% | 2651 fps | 96.5% |
| Vihtavuori N120 | <<locked>> | 86% | 54,360 psi | 90% | 2628 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 52,460 psi | 87% | 2654 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 51,880 psi | 86% | 2661 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 51,082 psi | 85% | 2730 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 53,156 psi | 88% | 2740 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,656 psi | 71% | 2592 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 94% | 51,271 psi | 85% | 2717 fps | 98.5% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 51,459 psi | 85% | 2736 fps | 99.8% |
| Winchester 748 | <<locked>> | 96% | 52,460 psi | 87% | 2805 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 98% | 51,605 psi | 86% | 2772 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% | 49,429 psi | 82% | 2579 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 33,620 psi | 56% | 2375 fps | 99.1% |
| Accurate 2200 | <<locked>> | 82% | 46,557 psi | 77% | 2654 fps | 95.4% |
| Accurate 2230 | <<locked>> | 80% | 43,192 psi | 72% | 2602 fps | 95% |
| Accurate 2460 | <<locked>> | 80% | 36,100 psi | 60% | 2451 fps | 97.4% |
| Accurate 2495 | <<locked>> | 80% | 26,092 psi | 43% | 2257 fps | 97.5% |
| Accurate 2520 | <<locked>> | 80% | 31,386 psi | 52% | 2382 fps | 95.4% |
| Accurate 4064 | <<locked>> | 84% | 27,978 psi | 46% | 2320 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 42,206 psi | 70% | 2467 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 80% | 42,583 psi | 71% | 2480 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 90% | 42,221 psi | 70% | 2595 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 45,426 psi | 75% | 2552 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 45,745 psi | 76% | 2635 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 40,263 psi | 67% | 2552 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 37,173 psi | 62% | 2467 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 30,835 psi | 51% | 2395 fps | 99.9% |
| Alliant Power Pro 1200-R | 37.2 gr | 82% | 39,334 psi | 65% | 2592 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 50,285 psi | 84% | 2822 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,580 psi | 64% | 2552 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,464 psi | 64% | 2484 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 44,947 psi | 75% | 2667 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,586 psi | 77% | 2566 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,611 psi | 67% | 2461 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 47,007 psi | 78% | 2694 fps | 95.2% |
| Bofors RP3 | <<locked>> | 94% | 37,942 psi | 63% | 2556 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 35,070 psi | 58% | 2379 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 84% | 34,272 psi | 57% | 2467 fps | 95.1% |
| Hodgdon CFE223 | 43.6 gr | 88% | 43,888 psi | 73% | 2697 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 36,898 psi | 61% | 2487 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 80% | 37,217 psi | 62% | 2497 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 80% | 46,514 psi | 77% | 2559 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 88% | 39,856 psi | 66% | 2559 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 37,971 psi | 63% | 2562 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,569 psi | 41% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 41,307 psi | 69% | 2566 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 29,312 psi | 49% | 2362 fps | 97.4% |
| IMR 4064 | <<locked>> | 96% | 45,150 psi | 75% | 2618 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 39,711 psi | 66% | 2464 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 40,538 psi | 67% | 2602 fps | 95% |
| IMR 8208 XBR | <<locked>> | 84% | 37,173 psi | 62% | 2467 fps | 95.3% |
| Lovex D073.4 | <<locked>> | 80% | 43,787 psi | 73% | 2602 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 35,737 psi | 59% | 2444 fps | 96% |
| Lovex D073.6 | <<locked>> | 84% | 32,314 psi | 54% | 2418 fps | 95.8% |
| Lovex S053 | <<locked>> | 80% | 51,401 psi | 85% | 2543 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 41,147 psi | 68% | 2500 fps | 95% |
| Lovex S062 | <<locked>> | 90% | 36,840 psi | 61% | 2480 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 43,569 psi | 72% | 2552 fps | 100% |
| Norma 201 | <<locked>> | 86% | 36,361 psi | 60% | 2454 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 29,805 psi | 50% | 2323 fps | 95.6% |
| Norma 203B | <<locked>> | 94% | 41,394 psi | 69% | 2608 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 96% | 44,541 psi | 74% | 2674 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 43,627 psi | 72% | 2631 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 43,279 psi | 72% | 2562 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,787 psi | 41% | 1499 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,840 psi | 61% | 2461 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 43,990 psi | 73% | 2713 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 36,825 psi | 61% | 2572 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 33,504 psi | 56% | 2372 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 88% | 36,637 psi | 61% | 2451 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 98% | 40,118 psi | 67% | 2589 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 43,787 psi | 73% | 2602 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 32,314 psi | 54% | 2418 fps | 95.8% |
| Shooters World Precision | <<locked>> | 90% | 36,840 psi | 61% | 2480 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,841 psi | 65% | 2467 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,891 psi | 78% | 2329 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,756 psi | 68% | 2559 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 42,902 psi | 71% | 2651 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 39,044 psi | 65% | 2490 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 43,439 psi | 72% | 2615 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,227 psi | 54% | 2300 fps | 96.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,107 psi | 43% | 2165 fps | 95% |
| Somchem S321 | <<locked>> | 82% | 36,898 psi | 61% | 2487 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 31,604 psi | 53% | 2306 fps | 97.1% |
| Somchem S341 | <<locked>> | 90% | 42,047 psi | 70% | 2575 fps | 95% |
| Somchem S355 | <<locked>> | 96% | 39,291 psi | 65% | 2552 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 45,484 psi | 76% | 2507 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,680 psi | 61% | 2398 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 32,039 psi | 53% | 2313 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 80% | 27,035 psi | 45% | 2267 fps | 97.6% |
| Vihtavuori N140 | <<locked>> | 80% | 28,195 psi | 47% | 2264 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 94% | 35,157 psi | 58% | 2444 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 84% | 36,927 psi | 61% | 2461 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 84% | 30,850 psi | 51% | 2346 fps | 95.8% |
| Winchester 748 | 39.9 gr | 84% | 35,244 psi | 59% | 2487 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 90% | 39,624 psi | 66% | 2562 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 85 powders for .308 Win. Ackley Improved loaded with the .308 | 153gr | TWENTY-NINE SILENTIO. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,881 fps. Accurate 2495 gives the best case fill at 100 %, and 85 of the 85 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 153.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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. Hodgdon CFE223, Alliant Power Pro 1200-R, Winchester 748 rank at the top here: for .308 Win. Ackley Improved with the .308 | 153gr | TWENTY-NINE SILENTIO 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.