Load Specifications
Bullet Manufacturer:TWENTY-NINE
Bullet Weight:160 gr
Bullet Diameter:0.323"
Bullet Length:<<locked>>
Caliber:8 x 68 S load data
Case Length (l3):2.657"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:86 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:12.5
Load data in caliber 8 x 68 S with 8 mm | 160gr | TWENTY-NINE ERTP bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 57,696 psi | 90% | 2995 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,362 psi | 88% | 3025 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,811 psi | 87% | 3015 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,520 psi | 85% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,057 psi | 88% | 3005 fps | 96% |
| Accurate 4064 | <<locked>> | 94% | 55,724 psi | 87% | 3064 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 3074 fps | 98.7% |
| Accurate LT-30 | <<locked>> | 82% | 56,739 psi | 89% | 2940 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,159 psi | 90% | 2966 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,724 psi | 89% | 3097 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 54,404 psi | 85% | 3041 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,043 psi | 88% | 3051 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 56,347 psi | 88% | 3028 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 57,740 psi | 90% | 3166 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,710 psi | 89% | 3225 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 57,537 psi | 90% | 3117 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 57,261 psi | 90% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,679 psi | 86% | 3087 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 3077 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,868 psi | 86% | 3189 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,592 psi | 56% | 2782 fps | 96.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,970 psi | 88% | 2930 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,927 psi | 89% | 3114 fps | 99.4% |
| Bofors RP3 | <<locked>> | 94% | 54,520 psi | 85% | 3081 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 55,042 psi | 86% | 3035 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,563 psi | 86% | 2982 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,129 psi | 86% | 3081 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 57,116 psi | 90% | 3182 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 56,782 psi | 89% | 3051 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,157 psi | 85% | 3022 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,854 psi | 88% | 3091 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 3130 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 90% | 57,319 psi | 90% | 3110 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,340 psi | 73% | 2953 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,492 psi | 89% | 3140 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 56,376 psi | 88% | 3169 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 55% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,143 psi | 86% | 3058 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 57,130 psi | 90% | 3097 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,348 psi | 90% | 3077 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,711 psi | 90% | 3054 fps | 97.2% |
| IMR 4198 | <<locked>> | 84% | 57,246 psi | 90% | 2959 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 57,000 psi | 89% | 3071 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,008 psi | 77% | 3012 fps | 98.4% |
| IMR 4895 | <<locked>> | 92% | 56,101 psi | 88% | 3120 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 56,043 psi | 88% | 3051 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,246 psi | 88% | 3035 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,376 psi | 88% | 3074 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,739 psi | 89% | 3025 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 56,840 psi | 89% | 3071 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3061 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 3041 fps | 96.7% |
| Norma 201 | <<locked>> | 90% | 55,535 psi | 87% | 3041 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,956 psi | 88% | 3048 fps | 100% |
| Norma 203B | <<locked>> | 94% | 57,450 psi | 90% | 3127 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 51,024 psi | 80% | 3068 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 92% | 54,549 psi | 85% | 3100 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,154 psi | 79% | 3054 fps | 96.8% |
| Ramshot TAC | <<locked>> | 88% | 56,550 psi | 89% | 3064 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,883 psi | 88% | 3087 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 57,261 psi | 90% | 3051 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 55% | 1913 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,463 psi | 87% | 3031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,333 psi | 88% | 3068 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,056 psi | 86% | 3156 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,505 psi | 85% | 3192 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 3097 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,750 psi | 81% | 3120 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 88% | 56,420 psi | 88% | 3025 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,101 psi | 88% | 3041 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,375 psi | 85% | 3068 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 55,042 psi | 86% | 3035 fps | 96.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3061 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,376 psi | 88% | 3074 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,840 psi | 89% | 3071 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 3041 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,216 psi | 87% | 2999 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 56,144 psi | 88% | 3130 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,926 psi | 86% | 2979 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,839 psi | 86% | 3041 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,405 psi | 87% | 3071 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 57,493 psi | 90% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 57,392 psi | 90% | 2976 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3015 fps | 97% |
| Somchem S321 | <<locked>> | 86% | 57,464 psi | 90% | 3087 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,550 psi | 89% | 2979 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,331 psi | 85% | 3031 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 54,650 psi | 86% | 3064 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,614 psi | 71% | 3012 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 57,188 psi | 90% | 2949 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,508 psi | 90% | 2966 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,376 psi | 87% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,478 psi | 89% | 3022 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,318 psi | 88% | 3045 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3064 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 88% | 56,579 psi | 89% | 3051 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,795 psi | 86% | 3018 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,634 psi | 82% | 3068 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,276 psi | 60% | 2867 fps | 96.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,694 psi | 86% | 3048 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 56,260 psi | 88% | 3100 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3133 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,085 psi | 86% | 3077 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 45,165 psi | 71% | 2805 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,240 psi | 77% | 2917 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,797 psi | 59% | 2717 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,498 psi | 70% | 2871 fps | 99.9% |
| Accurate 2700 | <<locked>> | 90% | 52,315 psi | 82% | 2946 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 35,694 psi | 56% | 2700 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 38,914 psi | 61% | 2835 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 80% | 53,214 psi | 83% | 2887 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,621 psi | 84% | 2913 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,568 psi | 65% | 2822 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,215 psi | 55% | 2654 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,584 psi | 68% | 2835 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 43,207 psi | 68% | 2831 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,734 psi | 80% | 3051 fps | 99.6% |
| Alliant Power Pro 2000-MR | 58.7 gr | 80% | 37,594 psi | 59% | 2828 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,693 psi | 54% | 2677 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,894 psi | 80% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,347 psi | 59% | 2743 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,825 psi | 58% | 2785 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 84% | 34,084 psi | 53% | 2743 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 33,562 psi | 53% | 2726 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,663 psi | 83% | 2884 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,611 psi | 64% | 2815 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 34,156 psi | 54% | 2680 fps | 96.8% |
| Bofors RP7 | <<locked>> | 96% | 51,822 psi | 81% | 2982 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,339 psi | 71% | 2828 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,134 psi | 66% | 2851 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,122 psi | 72% | 2995 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 80% | 49,705 psi | 78% | 2943 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,531 psi | 79% | 2966 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 40,161 psi | 63% | 2799 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 96% | 48,022 psi | 75% | 3009 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 41,887 psi | 66% | 2831 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,676 psi | 50% | 2618 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,666 psi | 59% | 2789 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 98% | 52,489 psi | 82% | 3104 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 41% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,205 psi | 63% | 2782 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 41,060 psi | 64% | 2835 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,927 psi | 58% | 2690 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,921 psi | 75% | 2884 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 51,082 psi | 80% | 2871 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 50,444 psi | 79% | 2963 fps | 95.7% |
| IMR 4831 | <<locked>> | 92% | 37,579 psi | 59% | 2782 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 38,247 psi | 60% | 2779 fps | 97.1% |
| IMR 8208 XBR | <<locked>> | 80% | 43,584 psi | 68% | 2835 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 49,153 psi | 77% | 2927 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,176 psi | 63% | 2795 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 41,930 psi | 66% | 2759 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 36,898 psi | 58% | 2700 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 43,729 psi | 69% | 2844 fps | 95.6% |
| Lovex S070 | <<locked>> | 96% | 47,224 psi | 74% | 2930 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 40,727 psi | 64% | 2776 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 40,886 psi | 64% | 2789 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 36,738 psi | 58% | 2733 fps | 96.6% |
| Norma URP | <<locked>> | 92% | 39,204 psi | 61% | 2835 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 36,172 psi | 57% | 2740 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 96% | 43,888 psi | 69% | 2933 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 43,497 psi | 68% | 2828 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,685 psi | 67% | 2851 fps | 98% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,123 psi | 74% | 2884 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 41% | 1713 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,718 psi | 76% | 2923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 46,311 psi | 73% | 2894 fps | 95.5% |
| ReloadSwiss RS 52 | 56.9 gr | 80% | 38,769 psi | 61% | 2848 fps | 96.5% |
| ReloadSwiss RS 60 | 57.8 gr | 80% | 31,937 psi | 50% | 2697 fps | 97.6% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 38,928 psi | 61% | 2854 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,192 psi | 66% | 2923 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 44,483 psi | 70% | 2825 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,725 psi | 61% | 2723 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,126 psi | 50% | 2618 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 96% | 51,822 psi | 81% | 2982 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 43,729 psi | 69% | 2844 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,176 psi | 63% | 2795 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 36,898 psi | 58% | 2700 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 96% | 47,224 psi | 74% | 2930 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,721 psi | 81% | 2943 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,185 psi | 52% | 2667 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,590 psi | 81% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,640 psi | 65% | 2799 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,089 psi | 63% | 2785 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,177 psi | 66% | 2733 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,882 psi | 55% | 2589 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 49,719 psi | 78% | 2900 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 47,050 psi | 74% | 2917 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 41,785 psi | 65% | 2736 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,350 psi | 65% | 2799 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 33,112 psi | 52% | 2628 fps | 95.8% |
| Somchem S365 | <<locked>> | 86% | 28,979 psi | 45% | 2602 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 47,732 psi | 75% | 2808 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,395 psi | 66% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,898 psi | 59% | 2713 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,682 psi | 61% | 2717 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 31,415 psi | 49% | 2566 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 90% | 38,508 psi | 60% | 2776 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 43,598 psi | 68% | 2828 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 80% | 37,260 psi | 58% | 2703 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 37,927 psi | 59% | 2782 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 35,810 psi | 56% | 2805 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,010 psi | 50% | 2585 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 42,743 psi | 67% | 2871 fps | 99.5% |
| Winchester 760 | <<locked>> | 96% | 48,254 psi | 76% | 3012 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,407 psi | 62% | 2785 fps | 97.9% |
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 103 powders for 8 x 68 S loaded with the 8 mm | 160gr | TWENTY-NINE ERTP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,225 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,225 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.323" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 8 x 68 S with the 8 mm | 160gr | TWENTY-NINE ERTP 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.