Load Specifications
Load data in caliber 8 x 75 RS with .323 | 150gr | Speer Hot-Cor bullet and 76 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 Alliant Reloder-17.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 47,108 psi | 85% | 2927 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 47,950 psi | 87% | 2986 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 48,327 psi | 88% | 3031 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 48,327 psi | 88% | 3031 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 48,051 psi | 87% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 46,818 psi | 85% | 3071 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 86% | 49,139 psi | 89% | 3051 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 90% | 47,268 psi | 86% | 2995 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 48,428 psi | 88% | 3009 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 84% | 48,327 psi | 88% | 3005 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 48,254 psi | 88% | 3150 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 49,647 psi | 90% | 3074 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 88% | 47,369 psi | 86% | 3038 fps | 98% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,211 psi | 89% | 3140 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 94% | 46,862 psi | 85% | 3123 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 48,747 psi | 88% | 3058 fps | 97.8% |
| Bofors RP3 | <<locked>> | 90% | 46,760 psi | 85% | 3028 fps | 99.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 47,442 psi | 86% | 2946 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 84% | 47,195 psi | 86% | 3028 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 82% | 48,617 psi | 88% | 3123 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 82% | 48,211 psi | 87% | 3005 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 48,037 psi | 87% | 3035 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 49,559 psi | 90% | 3064 fps | 99.1% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,455 psi | 82% | 3012 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 48,530 psi | 88% | 3094 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,925 psi | 63% | 1936 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 46,847 psi | 85% | 2995 fps | 98.7% |
| IMR 3031 | <<locked>> | 88% | 47,616 psi | 86% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 49,023 psi | 89% | 3022 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,554 psi | 77% | 2966 fps | 96.3% |
| IMR 4895 | <<locked>> | 88% | 48,544 psi | 88% | 3074 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 84% | 48,428 psi | 88% | 3009 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 86% | 48,327 psi | 88% | 3031 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 49,400 psi | 90% | 2986 fps | 98.8% |
| Lovex S062 | <<locked>> | 90% | 49,284 psi | 89% | 3035 fps | 99.5% |
| Lovex S065 | <<locked>> | 96% | 48,776 psi | 89% | 3018 fps | 96.2% |
| Norma 201 | <<locked>> | 86% | 48,109 psi | 87% | 3002 fps | 99.4% |
| Norma 202 | <<locked>> | 86% | 48,559 psi | 88% | 3015 fps | 100% |
| Norma 203B | <<locked>> | 90% | 49,647 psi | 90% | 3081 fps | 98.8% |
| Norma URP | <<locked>> | 98% | 46,717 psi | 85% | 3064 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 90% | 49,690 psi | 90% | 3100 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 48,762 psi | 88% | 3009 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 47,935 psi | 87% | 3031 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 82% | 49,342 psi | 90% | 3005 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,157 psi | 64% | 1978 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 46,615 psi | 85% | 3091 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 46,702 psi | 85% | 3133 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 46,731 psi | 85% | 3091 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 47,485 psi | 86% | 3110 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 84% | 49,371 psi | 90% | 2999 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 48,573 psi | 88% | 2999 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 94% | 49,777 psi | 90% | 3074 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 48,776 psi | 89% | 3018 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 48,327 psi | 88% | 3031 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 49,284 psi | 89% | 3035 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 48,138 psi | 87% | 3077 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 46,876 psi | 85% | 2979 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 47,616 psi | 86% | 3015 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 49,821 psi | 90% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 46,731 psi | 85% | 2900 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 49,211 psi | 89% | 3038 fps | 99.6% |
| Somchem S335 | <<locked>> | 86% | 49,168 psi | 89% | 2953 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 49,777 psi | 90% | 3038 fps | 98.7% |
| Somchem S355 | <<locked>> | 92% | 47,398 psi | 86% | 3022 fps | 98.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,541 psi | 81% | 3068 fps | 99.4% |
| Unknown powder | <<locked>> | 96% | 47,863 psi | 87% | 3074 fps | 96.7% |
| Vihtavuori N133 | <<locked>> | 84% | 47,036 psi | 85% | 2900 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 47,848 psi | 87% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 48,965 psi | 89% | 2992 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 48,573 psi | 88% | 3005 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 98% | 49,023 psi | 89% | 3064 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 84% | 48,776 psi | 89% | 3009 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 88% | 47,253 psi | 86% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 48,414 psi | 88% | 3071 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 46,818 psi | 85% | 2992 fps | 98.9% |
| Winchester 748 | <<locked>> | 82% | 48,515 psi | 88% | 3061 fps | 99.8% |
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% | 44,135 psi | 80% | 2871 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,854 psi | 67% | 2776 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,989 psi | 76% | 2910 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 41,989 psi | 76% | 2910 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 34,838 psi | 63% | 2756 fps | 99% |
| Accurate 4350 | <<locked>> | 94% | 40,698 psi | 74% | 2946 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 40,669 psi | 74% | 2877 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 39,276 psi | 71% | 2825 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,728 psi | 78% | 2894 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 42,047 psi | 76% | 2897 fps | 100% |
| Alliant Power Pro 2000-MR | 61.9 gr | 82% | 39,349 psi | 71% | 2946 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,910 psi | 62% | 2730 fps | 95.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,535 psi | 66% | 2795 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,930 psi | 74% | 2956 fps | 95.7% |
| Alliant Reloder-17 | 63.9 gr | 86% | 35,737 psi | 65% | 2858 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,653 psi | 72% | 2867 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 33,243 psi | 60% | 2726 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,541 psi | 81% | 2890 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,176 psi | 75% | 2907 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,121 psi | 82% | 3054 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 45,150 psi | 82% | 2949 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 42,032 psi | 76% | 2910 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 41,002 psi | 74% | 2890 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,201 psi | 64% | 2779 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,693 psi | 63% | 2789 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,904 psi | 47% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,448 psi | 66% | 2766 fps | 96.2% |
| IMR 3031 | <<locked>> | 80% | 36,767 psi | 67% | 2825 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 38,276 psi | 69% | 2795 fps | 95.7% |
| IMR 4831 | <<locked>> | 98% | 39,856 psi | 72% | 2907 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 37,376 psi | 68% | 2831 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 42,728 psi | 78% | 2894 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 80% | 39,305 psi | 71% | 2854 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 41,191 psi | 75% | 2818 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 36,143 psi | 66% | 2756 fps | 97.1% |
| Lovex S065 | <<locked>> | 94% | 45,818 psi | 83% | 2959 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 39,943 psi | 72% | 2835 fps | 98% |
| Norma 202 | <<locked>> | 80% | 40,045 psi | 73% | 2851 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 35,897 psi | 65% | 2785 fps | 95.5% |
| Norma URP | <<locked>> | 94% | 41,031 psi | 74% | 2946 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 37,855 psi | 69% | 2851 fps | 95.9% |
| Ramshot TAC | <<locked>> | 82% | 45,701 psi | 83% | 2949 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,959 psi | 76% | 2910 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,209 psi | 84% | 2943 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,208 psi | 48% | 1775 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,695 psi | 68% | 2894 fps | 95.4% |
| ReloadSwiss RS 60 | 59.5 gr | 80% | 31,256 psi | 57% | 2740 fps | 96.4% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,625 psi | 74% | 2963 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,324 psi | 80% | 3041 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 43,758 psi | 79% | 2894 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 37,985 psi | 69% | 2779 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 33,504 psi | 61% | 2723 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,818 psi | 83% | 2959 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,305 psi | 71% | 2854 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 36,143 psi | 66% | 2756 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 37,057 psi | 67% | 2838 fps | 95.7% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,584 psi | 79% | 2913 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,160 psi | 71% | 2838 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,336 psi | 75% | 2799 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,142 psi | 62% | 2644 fps | 99.3% |
| Somchem S321 | <<locked>> | 80% | 46,021 psi | 84% | 2979 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 41,017 psi | 74% | 2802 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 40,437 psi | 73% | 2854 fps | 96.8% |
| Somchem S355 | <<locked>> | 82% | 34,432 psi | 62% | 2733 fps | 95.5% |
| Somchem S365 | <<locked>> | 90% | 32,097 psi | 58% | 2762 fps | 96% |
| Unknown powder | <<locked>> | 92% | 42,061 psi | 76% | 2956 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 41,510 psi | 75% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,956 psi | 67% | 2772 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,855 psi | 69% | 2776 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 30,719 psi | 56% | 2612 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 92% | 40,321 psi | 73% | 2890 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 42,656 psi | 77% | 2890 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 36,405 psi | 66% | 2756 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 42,395 psi | 77% | 2949 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,576 psi | 61% | 2690 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 45,295 psi | 82% | 3002 fps | 99.5% |
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 97 powders for 8 x 75 RS loaded with the .323 | 150gr | Speer Hot-Cor. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,150 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.323" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, Alliant Reloder-17 rank at the top here: for 8 x 75 RS with the .323 | 150gr | Speer Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-26, Bofors RP7 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.