Load Specifications
Load data in caliber 8 x 60 S with .323 | 139gr | Geco ZERO bullet and 73 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, IMR 3031 and Hodgdon H4895.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 52,025 psi | 89% | 2917 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 50,763 psi | 86% | 2976 fps | 100% |
| Accurate 2230 | <<locked>> | 86% | 52,924 psi | 90% | 3064 fps | 96.2% |
| Accurate 2460 | <<locked>> | 92% | 53,055 psi | 90% | 3041 fps | 99.5% |
| Accurate 2495ᴾ | <<locked>> | 100% | 49,327 psi | 84% | 3012 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 50,212 psi | 85% | 3031 fps | 98.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 45,745 psi | 78% | 2982 fps | 99.1% |
| Accurate LT-30 | <<locked>> | 86% | 49,821 psi | 85% | 2890 fps | 99.8% |
| Accurate LT-32 | <<locked>> | 86% | 50,285 psi | 86% | 2907 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 96% | 50,096 psi | 85% | 3025 fps | 96.1% |
| ADI AR 2207 | <<locked>> | 84% | 50,357 psi | 86% | 2933 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 52,286 psi | 89% | 3054 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 94% | 50,038 psi | 85% | 2995 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 96% | 50,937 psi | 87% | 3058 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 50,546 psi | 86% | 3100 fps | 97% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 46,021 psi | 78% | 2972 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 90% | 51,068 psi | 87% | 2999 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 84% | 51,416 psi | 88% | 2943 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,996 psi | 89% | 2933 fps | 100% |
| Bofors RP3ᴾ | <<locked>> | 100% | 45,745 psi | 78% | 2979 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 94% | 52,924 psi | 90% | 3002 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 96% | 51,111 psi | 87% | 3071 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 90% | 50,473 psi | 86% | 3025 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 90% | 51,692 psi | 88% | 3045 fps | 99.5% |
| Hodgdon H4198 | <<locked>> | 84% | 51,706 psi | 88% | 2943 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 96% | 50,386 psi | 86% | 3041 fps | 96.9% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 52,098 psi | 89% | 3117 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,011 psi | 56% | 1857 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 52,402 psi | 89% | 3051 fps | 97.1% |
| IMR 3031 | <<locked>> | 98% | 51,808 psi | 88% | 3107 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 52,402 psi | 89% | 2972 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 51,576 psi | 88% | 3087 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 94% | 50,038 psi | 85% | 2995 fps | 97.4% |
| Lovex D073.4 | <<locked>> | 84% | 49,676 psi | 85% | 2999 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 92% | 53,142 psi | 90% | 3045 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 98% | 51,372 psi | 87% | 3061 fps | 99.1% |
| Lovex S060 | <<locked>> | 96% | 51,459 psi | 88% | 2969 fps | 96.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 49,342 psi | 84% | 2999 fps | 97.4% |
| Norma 200 | <<locked>> | 86% | 51,111 psi | 87% | 2976 fps | 100% |
| Norma 201 | <<locked>> | 98% | 51,735 psi | 88% | 3028 fps | 97.8% |
| Norma 202 | <<locked>> | 98% | 52,315 psi | 89% | 3054 fps | 99.5% |
| Norma 203Bᴾ | <<locked>> | 100% | 49,400 psi | 84% | 3038 fps | 96% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 50,372 psi | 86% | 3061 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 96% | 52,750 psi | 90% | 3074 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 92% | 51,982 psi | 88% | 2999 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,069 psi | 56% | 1903 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 50,024 psi | 85% | 2999 fps | 98.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 44,092 psi | 75% | 3005 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 96% | 52,823 psi | 90% | 3035 fps | 99.4% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 52,214 psi | 89% | 3025 fps | 97.9% |
| Shooters World AR Plus | <<locked>> | 84% | 49,676 psi | 85% | 2999 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 98% | 51,372 psi | 87% | 3061 fps | 99.1% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 49,342 psi | 84% | 2999 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 50,343 psi | 86% | 2956 fps | 97.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 51,372 psi | 87% | 2687 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 52,692 psi | 90% | 3058 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 52,533 psi | 89% | 3022 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 51,938 psi | 88% | 3051 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 51,837 psi | 88% | 2953 fps | 99.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 47,601 psi | 81% | 2890 fps | 99.5% |
| Somchem S321 | <<locked>> | 92% | 51,169 psi | 87% | 3038 fps | 98% |
| Somchem S335 | <<locked>> | 96% | 50,285 psi | 86% | 2946 fps | 99.7% |
| Somchem S341 | <<locked>> | 96% | 51,010 psi | 87% | 3015 fps | 96.1% |
| Vihtavuori N120 | <<locked>> | 84% | 50,415 psi | 86% | 2884 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 51,605 psi | 88% | 2946 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 51,314 psi | 87% | 2953 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 50,169 psi | 85% | 3015 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 52,721 psi | 90% | 3031 fps | 99.7% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,090 psi | 72% | 2851 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 94% | 50,618 psi | 86% | 2999 fps | 97.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 51,126 psi | 87% | 3022 fps | 99.3% |
| Winchester 748 | <<locked>> | 96% | 52,127 psi | 89% | 3097 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 98% | 51,155 psi | 87% | 3054 fps | 97% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 48,718 psi | 83% | 2864 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 32,300 psi | 55% | 2605 fps | 98% |
| Accurate 2230 | <<locked>> | 84% | 48,994 psi | 83% | 2995 fps | 95.2% |
| Accurate 2460 | <<locked>> | 80% | 34,751 psi | 59% | 2684 fps | 95.8% |
| Accurate 2495 | <<locked>> | 80% | 24,453 psi | 42% | 2444 fps | 95.1% |
| Accurate 2520 | <<locked>> | 84% | 34,998 psi | 60% | 2726 fps | 95.4% |
| Accurate 4064 | <<locked>> | 88% | 30,501 psi | 52% | 2638 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 41,379 psi | 70% | 2733 fps | 98.9% |
| Accurate LT-32 | <<locked>> | 80% | 41,742 psi | 71% | 2743 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 94% | 47,079 psi | 80% | 2969 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 44,266 psi | 75% | 2835 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 39,421 psi | 67% | 2815 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 88% | 41,162 psi | 70% | 2825 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 29,689 psi | 51% | 2625 fps | 99.3% |
| Alliant Power Pro 1200-R | 49.5 gr | 86% | 44,179 psi | 75% | 2976 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 43,192 psi | 74% | 2920 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,260 psi | 63% | 2740 fps | 99.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 45,382 psi | 77% | 2841 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,900 psi | 68% | 2717 fps | 98.8% |
| Bofors RP3 | <<locked>> | 98% | 42,554 psi | 72% | 2917 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 38,783 psi | 66% | 2726 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 88% | 38,537 psi | 66% | 2825 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 36,056 psi | 61% | 2740 fps | 97.5% |
| Hodgdon H335 | <<locked>> | 80% | 36,550 psi | 62% | 2749 fps | 96.6% |
| Hodgdon H4198 | <<locked>> | 80% | 45,687 psi | 78% | 2835 fps | 99.1% |
| Hodgdon H4895 | 52.9 gr | 92% | 44,251 psi | 75% | 2923 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 42,569 psi | 72% | 2933 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,250 psi | 41% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 46,064 psi | 78% | 2936 fps | 95.7% |
| IMR 3031 | 44.5 gr | 80% | 28,427 psi | 48% | 2589 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 38,870 psi | 66% | 2733 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 45,223 psi | 77% | 2969 fps | 95% |
| IMR 8208 XBR | <<locked>> | 88% | 41,162 psi | 70% | 2825 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 42,844 psi | 73% | 2871 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 82% | 37,159 psi | 63% | 2740 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 88% | 36,158 psi | 62% | 2766 fps | 95.8% |
| Lovex S060 | <<locked>> | 92% | 45,658 psi | 78% | 2861 fps | 95% |
| Lovex S062 | <<locked>> | 94% | 40,698 psi | 69% | 2831 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 42,047 psi | 72% | 2818 fps | 100% |
| Norma 201 | <<locked>> | 90% | 40,045 psi | 68% | 2802 fps | 95% |
| Norma 202 | <<locked>> | 84% | 32,953 psi | 56% | 2661 fps | 95.4% |
| Norma 203B | <<locked>> | 98% | 46,398 psi | 79% | 2979 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 98% | 47,123 psi | 80% | 2999 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 92% | 45,861 psi | 78% | 2949 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 90% | 48,704 psi | 83% | 2943 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,192 psi | 41% | 1696 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,752 psi | 61% | 2703 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 38,580 psi | 66% | 2874 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 82% | 34,243 psi | 58% | 2657 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 92% | 40,393 psi | 69% | 2802 fps | 95.1% |
| Shooters World AR Plus | <<locked>> | 80% | 42,844 psi | 73% | 2871 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 36,158 psi | 62% | 2766 fps | 95.8% |
| Shooters World Precision | <<locked>> | 94% | 40,698 psi | 69% | 2831 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 43,859 psi | 75% | 2838 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,137 psi | 79% | 2612 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,074 psi | 68% | 2822 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,927 psi | 65% | 2749 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 48,602 psi | 83% | 2992 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 33,199 psi | 57% | 2579 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 30,458 psi | 52% | 2530 fps | 95.6% |
| Somchem S321 | <<locked>> | 86% | 41,336 psi | 70% | 2851 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 30,414 psi | 52% | 2526 fps | 95.4% |
| Somchem S341 | <<locked>> | 94% | 47,616 psi | 81% | 2956 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 44,338 psi | 75% | 2785 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 35,563 psi | 61% | 2644 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 80% | 30,951 psi | 53% | 2543 fps | 97.4% |
| Vihtavuori N135 | <<locked>> | 80% | 25,846 psi | 44% | 2477 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 84% | 31,198 psi | 53% | 2592 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 98% | 39,465 psi | 67% | 2799 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 88% | 41,263 psi | 70% | 2822 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 88% | 34,200 psi | 58% | 2680 fps | 95.7% |
| Winchester 748 | <<locked>> | 88% | 39,653 psi | 68% | 2854 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 94% | 44,599 psi | 76% | 2936 fps | 95.4% |
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 91 powders for 8 x 60 S loaded with the .323 | 139gr | Geco ZERO. Hodgdon LEVERevolution delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,117 fps. Accurate 2495 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.323" calls for a 1:14.5 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. Alliant Power Pro 1200-R, IMR 3031, Hodgdon H4895 rank at the top here: for 8 x 60 S with the .323 | 139gr | Geco ZERO they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder-17 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.