Load Specifications
Bullet Manufacturer:Barnes
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:1:13.0
Load data in caliber 8 x 68 S with .323 | 160gr | Barnes TTSX BT bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 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% | 56,347 psi | 88% | 2986 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,853 psi | 86% | 3012 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 53,896 psi | 84% | 2999 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,216 psi | 87% | 3064 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,216 psi | 87% | 3064 fps | 100% |
| Accurate 2700 | <<locked>> | 96% | 55,782 psi | 87% | 2992 fps | 96% |
| Accurate 4064 | <<locked>> | 96% | 57,479 psi | 90% | 3094 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,966 psi | 78% | 3054 fps | 98.5% |
| Accurate LT-30 | <<locked>> | 82% | 55,724 psi | 87% | 2930 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,159 psi | 88% | 2956 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,564 psi | 87% | 3087 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 96% | 56,681 psi | 89% | 3081 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 57,058 psi | 89% | 3061 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,998 psi | 86% | 3041 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,071 psi | 86% | 3018 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,623 psi | 89% | 3156 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,332 psi | 87% | 3205 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,289 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,043 psi | 88% | 2992 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,072 psi | 89% | 3130 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,037 psi | 77% | 3064 fps | 98.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3235 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,447 psi | 54% | 2759 fps | 96% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,042 psi | 86% | 2920 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,825 psi | 87% | 3104 fps | 99.3% |
| Bofors RP3 | <<locked>> | 96% | 56,840 psi | 89% | 3120 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3077 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,753 psi | 89% | 3022 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,882 psi | 84% | 3068 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,927 psi | 88% | 3169 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 86% | 54,621 psi | 86% | 3025 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,318 psi | 88% | 3061 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,549 psi | 85% | 3074 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 98% | 55,477 psi | 87% | 3143 fps | 97% |
| Hodgdon H4198 | <<locked>> | 82% | 57,653 psi | 90% | 2979 fps | 100% |
| Hodgdon H4895 | <<locked>> | 90% | 56,086 psi | 88% | 3097 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,165 psi | 71% | 2940 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,317 psi | 87% | 3130 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3153 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,795 psi | 55% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,420 psi | 88% | 3084 fps | 99.9% |
| IMR 3031 | <<locked>> | 94% | 57,580 psi | 90% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,158 psi | 86% | 3048 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 96% | 55,114 psi | 86% | 3018 fps | 96.7% |
| IMR 4198 | <<locked>> | 84% | 56,333 psi | 88% | 2953 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,057 psi | 88% | 3061 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,177 psi | 66% | 2890 fps | 96.9% |
| IMR 4895 | <<locked>> | 92% | 54,853 psi | 86% | 3107 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 88% | 54,998 psi | 86% | 3041 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,795 psi | 86% | 3022 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,940 psi | 86% | 3058 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,753 psi | 87% | 3015 fps | 99.7% |
| Lovex S062 | <<locked>> | 94% | 55,521 psi | 87% | 3058 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3048 fps | 98% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 3025 fps | 96.5% |
| Norma 201 | <<locked>> | 92% | 57,595 psi | 90% | 3081 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,723 psi | 86% | 3031 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,217 psi | 88% | 3114 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 49,806 psi | 78% | 3051 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 94% | 57,043 psi | 89% | 3143 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,008 psi | 77% | 3038 fps | 96.6% |
| Ramshot TAC | <<locked>> | 88% | 55,434 psi | 87% | 3054 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,723 psi | 86% | 3074 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,159 psi | 88% | 3041 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,998 psi | 55% | 1913 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,360 psi | 85% | 3022 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,143 psi | 86% | 3054 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,653 psi | 90% | 3202 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,072 psi | 89% | 3235 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,850 psi | 78% | 3081 fps | 98.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 3104 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 88% | 54,882 psi | 86% | 3012 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,476 psi | 85% | 3022 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 56,463 psi | 88% | 3104 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3077 fps | 96.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3048 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,940 psi | 86% | 3058 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,521 psi | 87% | 3058 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,098 psi | 82% | 3025 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,128 psi | 85% | 2989 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,290 psi | 90% | 3071 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,969 psi | 86% | 3117 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,217 psi | 90% | 3018 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,203 psi | 90% | 3081 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,259 psi | 85% | 3054 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,333 psi | 88% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,304 psi | 88% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 3002 fps | 96.8% |
| Somchem S321 | <<locked>> | 86% | 56,260 psi | 88% | 3074 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,376 psi | 87% | 2969 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,043 psi | 89% | 3081 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 57,000 psi | 89% | 3107 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,150 psi | 69% | 2992 fps | 99.7% |
| Unknown powderᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3117 fps | 98.5% |
| Vihtavuori N130 | <<locked>> | 86% | 56,072 psi | 88% | 2940 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,449 psi | 88% | 2959 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 57,450 psi | 90% | 3038 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,303 psi | 87% | 3012 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,114 psi | 86% | 3031 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 3048 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 88% | 55,405 psi | 87% | 3038 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 57,203 psi | 90% | 3058 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,358 psi | 80% | 3051 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,912 psi | 58% | 2841 fps | 96.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3035 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 55,825 psi | 87% | 3100 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,477 psi | 87% | 3143 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,709 psi | 87% | 3091 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% | 43,859 psi | 69% | 2792 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,805 psi | 75% | 2900 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,984 psi | 56% | 2690 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,394 psi | 65% | 2831 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 41,394 psi | 65% | 2831 fps | 99.7% |
| Accurate 2700 | <<locked>> | 94% | 52,243 psi | 82% | 2936 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 34,069 psi | 53% | 2671 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 37,478 psi | 59% | 2808 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 52,446 psi | 82% | 2881 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,837 psi | 83% | 2907 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,393 psi | 63% | 2802 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 36,622 psi | 57% | 2697 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 53,330 psi | 84% | 3005 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,525 psi | 67% | 2818 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 41,989 psi | 66% | 2818 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,371 psi | 77% | 3031 fps | 99.5% |
| Alliant Power Pro 2000-MR | 58.6 gr | 80% | 36,361 psi | 57% | 2802 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,533 psi | 53% | 2657 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,429 psi | 77% | 2894 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,187 psi | 57% | 2723 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,232 psi | 60% | 2828 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 33,025 psi | 52% | 2723 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,430 psi | 51% | 2700 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,532 psi | 81% | 2871 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,363 psi | 62% | 2795 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 32,808 psi | 51% | 2654 fps | 96.4% |
| Bofors RP7 | <<locked>> | 96% | 50,357 psi | 79% | 2963 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,353 psi | 70% | 2815 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,712 psi | 64% | 2831 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,947 psi | 70% | 2979 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 44,918 psi | 70% | 2867 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,533 psi | 82% | 3002 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 38,885 psi | 61% | 2776 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 94% | 48,240 psi | 76% | 3018 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 54,201 psi | 85% | 2930 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 40,756 psi | 64% | 2815 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 32,576 psi | 51% | 2651 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,505 psi | 54% | 2720 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 98% | 51,314 psi | 80% | 3084 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,846 psi | 41% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,303 psi | 57% | 2697 fps | 96.9% |
| IMR 3031 | <<locked>> | 80% | 36,477 psi | 57% | 2749 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,694 psi | 56% | 2667 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 48,689 psi | 76% | 2907 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 50,169 psi | 79% | 2861 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 49,327 psi | 77% | 2946 fps | 95.4% |
| IMR 4831 | <<locked>> | 96% | 37,043 psi | 58% | 2779 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,072 psi | 58% | 2759 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 42,525 psi | 67% | 2818 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 47,732 psi | 75% | 2907 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 38,798 psi | 61% | 2776 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 40,944 psi | 64% | 2746 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 35,665 psi | 56% | 2680 fps | 97.6% |
| Lovex S065 | <<locked>> | 92% | 42,540 psi | 67% | 2825 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 45,963 psi | 72% | 2913 fps | 95% |
| Norma 201 | <<locked>> | 80% | 39,436 psi | 62% | 2756 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 39,682 psi | 62% | 2772 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 35,563 psi | 56% | 2710 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 38,058 psi | 60% | 2815 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 34,940 psi | 55% | 2717 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 98% | 45,643 psi | 72% | 2976 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 42,482 psi | 67% | 2815 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,597 psi | 65% | 2835 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,079 psi | 72% | 2871 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,947 psi | 41% | 1709 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,659 psi | 75% | 2910 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 45,194 psi | 71% | 2877 fps | 95.2% |
| ReloadSwiss RS 52 | 56.9 gr | 80% | 37,608 psi | 59% | 2828 fps | 96.2% |
| ReloadSwiss RS 60 | 57.7 gr | 80% | 30,748 psi | 48% | 2667 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,335 psi | 63% | 2890 fps | 96% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,075 psi | 64% | 2907 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 42,989 psi | 67% | 2808 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 37,434 psi | 59% | 2700 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 30,777 psi | 48% | 2592 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 96% | 50,357 psi | 79% | 2963 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 42,540 psi | 67% | 2825 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,798 psi | 61% | 2776 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 35,665 psi | 56% | 2680 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 98% | 48,747 psi | 76% | 2966 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,386 psi | 79% | 2930 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,447 psi | 84% | 3012 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,330 psi | 54% | 2707 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,401 psi | 79% | 2917 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,379 psi | 63% | 2779 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,001 psi | 61% | 2769 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,133 psi | 64% | 2723 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,866 psi | 53% | 2575 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 48,501 psi | 76% | 2887 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 45,643 psi | 72% | 2900 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 40,596 psi | 64% | 2723 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,074 psi | 63% | 2779 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 31,879 psi | 50% | 2605 fps | 95.3% |
| Somchem S365 | <<locked>> | 88% | 29,646 psi | 46% | 2631 fps | 95.7% |
| Unknown powder | <<locked>> | 92% | 41,742 psi | 65% | 2881 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 46,644 psi | 73% | 2799 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,379 psi | 65% | 2723 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,492 psi | 57% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,550 psi | 59% | 2703 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 30,284 psi | 47% | 2543 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 90% | 37,405 psi | 59% | 2759 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 42,496 psi | 67% | 2815 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 36,143 psi | 57% | 2687 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 39,291 psi | 62% | 2818 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 34,447 psi | 54% | 2779 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,185 psi | 52% | 2625 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 45,020 psi | 71% | 2920 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 48,240 psi | 76% | 3018 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,935 psi | 75% | 2963 fps | 99.4% |
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 115 powders for 8 x 68 S loaded with the .323 | 160gr | Barnes TTSX BT. Alliant Reloder-17 delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,235 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.323" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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 2000-MR, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for 8 x 68 S with the .323 | 160gr | Barnes TTSX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H4350 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.