Load Specifications
Bullet Manufacturer:MRR
Bullet Weight:170 gr
Bullet Diameter:0.325"
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:1:14.5
Load data in caliber 8 x 68 S with .325 | 170gr | MRR Green Hunting bullet and 104 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 56,202 psi | 88% | 2904 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,607 psi | 86% | 2930 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,433 psi | 85% | 2923 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,884 psi | 89% | 2995 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,476 psi | 85% | 2923 fps | 96.6% |
| Accurate 4064 | <<locked>> | 92% | 54,491 psi | 85% | 2972 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3058 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 88% | 55,695 psi | 87% | 3012 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 56,652 psi | 89% | 3009 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,810 psi | 86% | 2963 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,303 psi | 87% | 2936 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,637 psi | 89% | 3074 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,506 psi | 87% | 3136 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,521 psi | 89% | 3031 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,912 psi | 88% | 2907 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,261 psi | 90% | 3054 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 3058 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 57,638 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,333 psi | 59% | 2776 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,495 psi | 65% | 2930 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,724 psi | 87% | 3028 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 57,188 psi | 90% | 3048 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,363 psi | 90% | 3012 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,391 psi | 88% | 2940 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,940 psi | 85% | 2989 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,173 psi | 88% | 3097 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 55,303 psi | 87% | 2953 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,492 psi | 89% | 2982 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,708 psi | 86% | 3005 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 98% | 54,215 psi | 85% | 3054 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 96% | 55,013 psi | 86% | 3015 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 88% | 56,260 psi | 88% | 3025 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,791 psi | 76% | 2930 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,680 psi | 87% | 3054 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,071 psi | 86% | 3091 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,114 psi | 55% | 1827 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,725 psi | 90% | 3028 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 56,043 psi | 88% | 3002 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,260 psi | 88% | 2992 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,434 psi | 88% | 2972 fps | 97.8% |
| IMR 4198 | <<locked>> | 82% | 56,028 psi | 88% | 2864 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 2982 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,028 psi | 88% | 2995 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,576 psi | 81% | 2989 fps | 99.3% |
| IMR 4895 | <<locked>> | 90% | 55,100 psi | 86% | 3035 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 54,810 psi | 86% | 2963 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,534 psi | 85% | 2940 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,056 psi | 86% | 2982 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,376 psi | 87% | 2936 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 55,709 psi | 87% | 2986 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,013 psi | 86% | 2982 fps | 98.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3018 fps | 98% |
| Norma 201 | <<locked>> | 90% | 57,682 psi | 90% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,897 psi | 86% | 2956 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,420 psi | 88% | 3041 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 53,708 psi | 84% | 3045 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 92% | 57,319 psi | 90% | 3071 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3038 fps | 98.2% |
| Ramshot TAC | <<locked>> | 86% | 55,172 psi | 86% | 2979 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,621 psi | 86% | 2999 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,622 psi | 87% | 2963 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,578 psi | 56% | 1873 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,725 psi | 90% | 2992 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,216 psi | 87% | 2989 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,070 psi | 85% | 3068 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,551 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,288 psi | 85% | 3077 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,331 psi | 85% | 3107 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 55,071 psi | 86% | 2933 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,621 psi | 86% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,753 psi | 89% | 3035 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 57,363 psi | 90% | 3012 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,013 psi | 86% | 2982 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,056 psi | 86% | 2982 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,709 psi | 87% | 2986 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3018 fps | 98% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,464 psi | 90% | 2963 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,303 psi | 87% | 3048 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,971 psi | 89% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,246 psi | 90% | 3012 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,638 psi | 90% | 3035 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,941 psi | 88% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,202 psi | 88% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,477 psi | 87% | 2933 fps | 97.6% |
| Somchem S321 | <<locked>> | 84% | 55,854 psi | 88% | 2992 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,114 psi | 86% | 2887 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,869 psi | 89% | 3002 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 57,188 psi | 90% | 3031 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,080 psi | 75% | 2989 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,767 psi | 87% | 2854 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,159 psi | 88% | 2874 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,201 psi | 85% | 2913 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,477 psi | 87% | 2933 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,230 psi | 87% | 2959 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3041 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 55,187 psi | 86% | 2959 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 57,246 psi | 90% | 2979 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,434 psi | 87% | 3045 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,422 psi | 63% | 2851 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3022 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,114 psi | 86% | 3009 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,215 psi | 85% | 3054 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,228 psi | 52% | 2756 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,711 psi | 90% | 3045 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% | 46,572 psi | 73% | 2759 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,184 psi | 80% | 2877 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,725 psi | 61% | 2671 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,151 psi | 72% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,732 psi | 75% | 2808 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 36,666 psi | 57% | 2657 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,563 psi | 56% | 2697 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 43,062 psi | 67% | 2789 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,535 psi | 57% | 2628 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,223 psi | 71% | 2802 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 45,092 psi | 71% | 2785 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,939 psi | 83% | 3018 fps | 100% |
| Alliant Power Pro 2000-MR | 59.7 gr | 80% | 39,001 psi | 61% | 2808 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,868 psi | 56% | 2648 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,562 psi | 82% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,798 psi | 61% | 2717 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,100 psi | 57% | 2713 fps | 95.9% |
| Alliant Reloder-17 | 58.8 gr | 80% | 30,980 psi | 49% | 2605 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,748 psi | 48% | 2595 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,624 psi | 61% | 2861 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,235 psi | 66% | 2789 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 35,418 psi | 56% | 2651 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 47,471 psi | 74% | 2848 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,949 psi | 74% | 2792 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,743 psi | 69% | 2818 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,472 psi | 76% | 2969 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 51,750 psi | 81% | 2904 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,736 psi | 83% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,419 psi | 57% | 2654 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 92% | 44,048 psi | 69% | 2871 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 94% | 51,619 psi | 81% | 2959 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 43,482 psi | 68% | 2802 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,835 psi | 48% | 2546 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,465 psi | 62% | 2766 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 47,558 psi | 75% | 2956 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 41% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,785 psi | 65% | 2753 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 42,975 psi | 67% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,305 psi | 60% | 2664 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,485 psi | 73% | 2802 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 52,939 psi | 83% | 2822 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,616 psi | 75% | 2871 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 46,398 psi | 73% | 2828 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 34,490 psi | 54% | 2651 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,740 psi | 62% | 2753 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 45,223 psi | 71% | 2802 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 50,836 psi | 80% | 2884 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,930 psi | 66% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,134 psi | 68% | 2726 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 38,029 psi | 60% | 2667 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 40,161 psi | 63% | 2710 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 43,337 psi | 68% | 2795 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,872 psi | 66% | 2736 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 42,279 psi | 66% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,145 psi | 60% | 2707 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 36,013 psi | 56% | 2700 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,623 psi | 59% | 2717 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 40,393 psi | 63% | 2799 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 44,991 psi | 71% | 2799 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,498 psi | 70% | 2825 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,704 psi | 76% | 2848 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,411 psi | 41% | 1673 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,792 psi | 80% | 2887 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,206 psi | 66% | 2753 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,611 psi | 64% | 2822 fps | 97.8% |
| ReloadSwiss RS 60 | 58.8 gr | 80% | 33,025 psi | 52% | 2677 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,447 psi | 56% | 2713 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,464 psi | 60% | 2785 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 45,832 psi | 72% | 2785 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,769 psi | 62% | 2684 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 33,141 psi | 52% | 2585 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 47,471 psi | 74% | 2848 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,161 psi | 63% | 2710 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,930 psi | 66% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,029 psi | 60% | 2667 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 43,337 psi | 68% | 2795 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,606 psi | 84% | 2907 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,447 psi | 54% | 2644 fps | 96.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,519 psi | 84% | 2884 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,076 psi | 68% | 2769 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,597 psi | 65% | 2756 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,497 psi | 68% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,027 psi | 56% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,411 psi | 71% | 2766 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 48,718 psi | 76% | 2881 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,960 psi | 67% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,975 psi | 67% | 2769 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 34,142 psi | 54% | 2598 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 28,007 psi | 44% | 2523 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 49,240 psi | 77% | 2762 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,845 psi | 69% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,291 psi | 62% | 2674 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,972 psi | 63% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,416 psi | 51% | 2533 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 35,360 psi | 55% | 2648 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 45,237 psi | 71% | 2799 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,595 psi | 60% | 2671 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 37,086 psi | 58% | 2703 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 32,996 psi | 52% | 2677 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,922 psi | 48% | 2507 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 44,788 psi | 70% | 2841 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 44,266 psi | 69% | 2874 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,038 psi | 49% | 2684 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,930 psi | 64% | 2756 fps | 98.8% |
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 104 powders for 8 x 68 S loaded with the .325 | 170gr | MRR Green Hunting. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,163 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 170.0 gr projectile in 0.325" calls for a 1:14.5 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 8 x 68 S with the .325 | 170gr | MRR Green Hunting 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.