Load Specifications
Bullet:.323 | 175gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
Bullet Weight:175 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:1:13.5
Load data in caliber 8 x 68 S with .323 | 175gr | Atomic 29 HP bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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>> | 86% | 56,666 psi | 89% | 2861 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,882 psi | 86% | 2887 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,810 psi | 86% | 2881 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,492 psi | 87% | 2943 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,492 psi | 87% | 2943 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,927 psi | 88% | 2890 fps | 97.1% |
| Accurate 4064 | <<locked>> | 92% | 54,694 psi | 86% | 2927 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3015 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 88% | 56,043 psi | 88% | 2969 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 57,058 psi | 89% | 2969 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,085 psi | 86% | 2920 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,564 psi | 87% | 2890 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,811 psi | 89% | 3028 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,840 psi | 88% | 3094 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,782 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,188 psi | 88% | 2864 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,479 psi | 90% | 3012 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,866 psi | 83% | 3022 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,128 psi | 85% | 3061 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 2740 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,843 psi | 66% | 2900 fps | 97.5% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,999 psi | 88% | 2986 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 57,508 psi | 90% | 3005 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,682 psi | 90% | 2972 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,884 psi | 89% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,128 psi | 85% | 2946 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,347 psi | 88% | 3051 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 54,955 psi | 86% | 2900 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,955 psi | 86% | 2966 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 96% | 56,275 psi | 88% | 3041 fps | 98.1% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2999 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 56,608 psi | 89% | 2982 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,095 psi | 77% | 2894 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,956 psi | 88% | 3012 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,521 psi | 87% | 3054 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 55% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,521 psi | 89% | 2963 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 54,708 psi | 86% | 2936 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,564 psi | 87% | 2936 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,042 psi | 86% | 2907 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 56,463 psi | 88% | 2825 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2943 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,318 psi | 88% | 2956 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,050 psi | 72% | 2851 fps | 98.6% |
| IMR 4895 | <<locked>> | 90% | 55,230 psi | 87% | 2989 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,085 psi | 86% | 2920 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,824 psi | 86% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,492 psi | 87% | 2943 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,608 psi | 87% | 2894 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 56,072 psi | 88% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,317 psi | 87% | 2946 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2979 fps | 98.2% |
| Norma 201 | <<locked>> | 88% | 54,360 psi | 85% | 2910 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,201 psi | 87% | 2913 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,623 psi | 89% | 2999 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 2995 fps | 96% |
| Norma URPᴾ | <<locked>> | 100% | 54,172 psi | 85% | 3005 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 92% | 57,435 psi | 90% | 3025 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,069 psi | 83% | 2999 fps | 98.3% |
| Ramshot TAC | <<locked>> | 86% | 55,347 psi | 87% | 2940 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,839 psi | 86% | 2956 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,970 psi | 88% | 2923 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,636 psi | 56% | 1837 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,375 psi | 85% | 2897 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,506 psi | 87% | 2946 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,288 psi | 85% | 3025 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,056 psi | 85% | 3064 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,665 psi | 86% | 3038 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,694 psi | 86% | 3068 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 86% | 55,172 psi | 86% | 2890 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,911 psi | 86% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 57,101 psi | 89% | 2992 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 57,682 psi | 90% | 2972 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,317 psi | 87% | 2946 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,492 psi | 87% | 2943 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,072 psi | 88% | 2943 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2979 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,622 psi | 87% | 3009 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 57,276 psi | 90% | 2887 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,522 psi | 90% | 2972 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,317 psi | 85% | 2936 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,376 psi | 88% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,536 psi | 89% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,840 psi | 88% | 2897 fps | 97.8% |
| Somchem S321 | <<locked>> | 84% | 56,275 psi | 88% | 2953 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,390 psi | 87% | 2844 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,145 psi | 90% | 2963 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 57,450 psi | 90% | 2989 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,269 psi | 76% | 2946 fps | 100% |
| Unknown powder | <<locked>> | 98% | 55,201 psi | 87% | 3012 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 55,840 psi | 88% | 2808 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,623 psi | 89% | 2835 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,737 psi | 86% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,840 psi | 88% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,521 psi | 87% | 2917 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,797 psi | 89% | 3002 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 86% | 55,463 psi | 87% | 2920 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 57,493 psi | 90% | 2936 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,695 psi | 87% | 3005 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,770 psi | 64% | 2818 fps | 98.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2982 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,086 psi | 88% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,275 psi | 88% | 3041 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,402 psi | 52% | 2726 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,651 psi | 87% | 2966 fps | 100% |
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% | 46,804 psi | 73% | 2720 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,372 psi | 81% | 2835 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,015 psi | 61% | 2631 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,860 psi | 70% | 2776 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,860 psi | 70% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 48,907 psi | 77% | 2776 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 36,927 psi | 58% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,330 psi | 52% | 2602 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 43,178 psi | 68% | 2749 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,753 psi | 58% | 2595 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,324 psi | 71% | 2759 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,382 psi | 71% | 2746 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 53,084 psi | 83% | 2972 fps | 100% |
| Alliant Power Pro 2000-MR | 58.7 gr | 80% | 39,218 psi | 61% | 2776 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,114 psi | 57% | 2615 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,808 psi | 83% | 2818 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,899 psi | 61% | 2680 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,982 psi | 53% | 2621 fps | 95.3% |
| Alliant Reloder-17 | 57.8 gr | 80% | 31,125 psi | 49% | 2572 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,024 psi | 49% | 2569 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,143 psi | 57% | 2759 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,467 psi | 67% | 2753 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 35,549 psi | 56% | 2612 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 47,587 psi | 75% | 2805 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,210 psi | 74% | 2753 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,961 psi | 69% | 2779 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,820 psi | 77% | 2930 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 48,211 psi | 76% | 2802 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,535 psi | 57% | 2618 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 88% | 42,438 psi | 67% | 2795 fps | 95% |
| Hodgdon H4350 | <<locked>> | 96% | 49,980 psi | 78% | 2887 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 43,584 psi | 68% | 2759 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,066 psi | 46% | 2457 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,217 psi | 58% | 2677 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 94% | 47,819 psi | 75% | 2920 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 41% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,783 psi | 61% | 2648 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 39,450 psi | 62% | 2687 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,984 psi | 56% | 2572 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 43,352 psi | 68% | 2697 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 53,055 psi | 83% | 2776 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,892 psi | 75% | 2835 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,787 psi | 69% | 2733 fps | 95.1% |
| IMR 4831 | <<locked>> | 90% | 33,272 psi | 52% | 2582 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,856 psi | 62% | 2710 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 45,324 psi | 71% | 2759 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 51,358 psi | 80% | 2848 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,105 psi | 66% | 2726 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,410 psi | 68% | 2687 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 38,261 psi | 60% | 2631 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 37,985 psi | 60% | 2621 fps | 95.1% |
| Lovex S070 | <<locked>> | 92% | 43,482 psi | 68% | 2759 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 42,134 psi | 66% | 2697 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 42,525 psi | 67% | 2710 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,247 psi | 60% | 2667 fps | 98% |
| Norma 204 | <<locked>> | 98% | 51,387 psi | 81% | 2933 fps | 95.1% |
| Norma URP | <<locked>> | 86% | 33,895 psi | 53% | 2605 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,855 psi | 59% | 2680 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 40,625 psi | 64% | 2766 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 45,440 psi | 71% | 2766 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,730 psi | 70% | 2785 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,139 psi | 77% | 2812 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,310 psi | 41% | 1640 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,908 psi | 80% | 2844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,453 psi | 67% | 2717 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,857 psi | 64% | 2785 fps | 98.1% |
| ReloadSwiss RS 60 | 57.8 gr | 80% | 33,185 psi | 52% | 2644 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,795 psi | 56% | 2680 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,696 psi | 61% | 2753 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 46,035 psi | 72% | 2743 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,205 psi | 63% | 2651 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,402 psi | 52% | 2556 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 47,587 psi | 75% | 2805 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,985 psi | 60% | 2621 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,105 psi | 66% | 2726 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,261 psi | 60% | 2631 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 43,482 psi | 68% | 2759 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,577 psi | 54% | 2608 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,780 psi | 84% | 2841 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,526 psi | 68% | 2736 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,742 psi | 65% | 2717 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,700 psi | 68% | 2657 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,187 psi | 57% | 2520 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 42,786 psi | 67% | 2677 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 49,023 psi | 77% | 2841 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,207 psi | 68% | 2657 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,207 psi | 68% | 2733 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 34,374 psi | 54% | 2566 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 26,440 psi | 41% | 2434 fps | 95.4% |
| Unknown powder | <<locked>> | 86% | 37,130 psi | 58% | 2674 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 49,429 psi | 77% | 2720 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,048 psi | 69% | 2651 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,523 psi | 62% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,263 psi | 63% | 2644 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,663 psi | 51% | 2500 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 35,578 psi | 56% | 2615 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,368 psi | 71% | 2756 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,740 psi | 61% | 2631 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,983 psi | 55% | 2615 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 94% | 33,199 psi | 52% | 2644 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,051 psi | 46% | 2418 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 48,602 psi | 76% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 42,438 psi | 67% | 2795 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,211 psi | 46% | 2582 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,605 psi | 81% | 2907 fps | 99.9% |
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 105 powders for 8 x 68 S loaded with the .323 | 175gr | Atomic 29 HP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,094 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.323" calls for a 1:13.5 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. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for 8 x 68 S with the .323 | 175gr | Atomic 29 HP 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.