Load Specifications
Load data in caliber 8 x 75 RS with .323 | 138.9gr | Sax KJG-SR bullet and 74 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 Hodgdon LEVERevolution.
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>> | 88% | 49,197 psi | 89% | 3058 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 47,500 psi | 86% | 3061 fps | 99.7% |
| Accurate 2495 | <<locked>> | 94% | 48,849 psi | 89% | 3104 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 48,849 psi | 89% | 3123 fps | 99.7% |
| Accurate 4064 | <<locked>> | 96% | 48,704 psi | 88% | 3140 fps | 100% |
| Accurate LT-30 | <<locked>> | 82% | 49,864 psi | 90% | 3009 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 48,486 psi | 88% | 3123 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 96% | 49,545 psi | 90% | 3117 fps | 97.1% |
| ADI AR 2219 | <<locked>> | 82% | 49,574 psi | 90% | 3123 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 48,124 psi | 87% | 3087 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 88% | 46,963 psi | 85% | 3091 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 48,791 psi | 89% | 3192 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 47,703 psi | 87% | 3209 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 48,472 psi | 88% | 3140 fps | 98.4% |
| Alliant Reloder-10x | <<locked>> | 84% | 49,197 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 49,327 psi | 90% | 3159 fps | 97.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,153 psi | 89% | 3241 fps | 98.2% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 48,863 psi | 89% | 2995 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 48,109 psi | 87% | 3127 fps | 96.4% |
| Bofors RP3 | <<locked>> | 96% | 48,225 psi | 88% | 3143 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 47,456 psi | 86% | 3028 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 49,603 psi | 90% | 3163 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 86% | 47,718 psi | 87% | 3192 fps | 96.9% |
| Hodgdon H322 | <<locked>> | 84% | 48,283 psi | 88% | 3100 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 49,313 psi | 89% | 3123 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 90% | 48,863 psi | 89% | 3136 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 47,340 psi | 86% | 3159 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,895 psi | 62% | 1969 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 47,311 psi | 86% | 3087 fps | 97.8% |
| IMR 3031 | <<locked>> | 90% | 47,630 psi | 86% | 3143 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 48,921 psi | 89% | 3097 fps | 97.2% |
| IMR 4198 | <<locked>> | 82% | 47,210 psi | 86% | 2995 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 47,181 psi | 86% | 3133 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 88% | 48,124 psi | 87% | 3087 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 84% | 47,398 psi | 86% | 3064 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 90% | 46,775 psi | 85% | 3097 fps | 99.5% |
| Lovex S060 | <<locked>> | 90% | 49,327 psi | 90% | 3061 fps | 97.7% |
| Lovex S062 | <<locked>> | 94% | 48,225 psi | 88% | 3100 fps | 98.7% |
| Norma 201 | <<locked>> | 90% | 47,195 psi | 86% | 3071 fps | 98.5% |
| Norma 202 | <<locked>> | 90% | 47,471 psi | 86% | 3087 fps | 99.8% |
| Norma 203B | <<locked>> | 94% | 48,428 psi | 88% | 3143 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 94% | 48,834 psi | 89% | 3166 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 47,442 psi | 86% | 3104 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 86% | 49,371 psi | 90% | 3081 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,968 psi | 62% | 2011 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 47,703 psi | 87% | 3074 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 48,443 psi | 88% | 3215 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 49,139 psi | 89% | 3258 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 88% | 48,051 psi | 87% | 3071 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 92% | 47,442 psi | 86% | 3064 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 98% | 47,819 psi | 87% | 3127 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 46,775 psi | 85% | 3097 fps | 99.5% |
| Shooters World Precision | <<locked>> | 94% | 48,225 psi | 88% | 3100 fps | 98.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 47,384 psi | 86% | 3031 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 47,007 psi | 85% | 3140 fps | 97.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 47,166 psi | 86% | 3045 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 47,108 psi | 85% | 3087 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 49,530 psi | 90% | 3035 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 49,037 psi | 89% | 3028 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 48,834 psi | 89% | 3120 fps | 98.9% |
| Somchem S335 | <<locked>> | 90% | 48,617 psi | 88% | 3031 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 49,182 psi | 89% | 3110 fps | 97.6% |
| Somchem S355 | <<locked>> | 98% | 48,921 psi | 89% | 3133 fps | 98.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,275 psi | 68% | 2976 fps | 96.5% |
| Vihtavuori N130 | <<locked>> | 86% | 49,487 psi | 90% | 3018 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 49,414 psi | 90% | 3031 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 49,530 psi | 90% | 3107 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 48,095 psi | 87% | 3068 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 98% | 47,181 psi | 86% | 3064 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 48,327 psi | 88% | 3081 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 94% | 49,458 psi | 90% | 3110 fps | 99.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,398 psi | 84% | 3048 fps | 97.6% |
| Winchester 748 | <<locked>> | 88% | 47,152 psi | 86% | 3127 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 92% | 49,748 psi | 90% | 3156 fps | 98.4% |
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% | 38,014 psi | 69% | 2844 fps | 99.9% |
| Accurate 2460 | <<locked>> | 80% | 41,292 psi | 75% | 2940 fps | 99% |
| Accurate 2495 | <<locked>> | 80% | 30,124 psi | 55% | 2707 fps | 98.9% |
| Accurate 2520 | <<locked>> | 80% | 36,550 psi | 66% | 2871 fps | 97.6% |
| Accurate 4064 | <<locked>> | 80% | 28,558 psi | 52% | 2674 fps | 96% |
| Accurate LT-30 | <<locked>> | 80% | 47,036 psi | 85% | 2956 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 39,929 psi | 72% | 2940 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 92% | 43,685 psi | 79% | 2999 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 46,369 psi | 84% | 3068 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,970 psi | 67% | 2844 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 80% | 35,433 psi | 64% | 2871 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,482 psi | 77% | 3061 fps | 96.8% |
| Alliant Power Pro 2000-MR | 64 gr | 90% | 44,585 psi | 81% | 3140 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 37,202 psi | 68% | 2897 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,395 psi | 79% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 43,207 psi | 78% | 3035 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 39,827 psi | 72% | 3031 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,832 psi | 83% | 2943 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 44,773 psi | 81% | 3058 fps | 95.5% |
| Bofors RP3 | <<locked>> | 88% | 36,463 psi | 66% | 2894 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,204 psi | 71% | 2854 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,809 psi | 63% | 2844 fps | 95.9% |
| Hodgdon CFE223 | <<locked>> | 82% | 41,365 psi | 75% | 3051 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 80% | 42,293 psi | 77% | 2986 fps | 99.7% |
| Hodgdon H335 | <<locked>> | 80% | 42,975 psi | 78% | 3002 fps | 99.4% |
| Hodgdon H4895 | <<locked>> | 82% | 37,666 psi | 68% | 2894 fps | 95.3% |
| Hodgdon LEVERevolution | 58.6 gr | 84% | 35,998 psi | 65% | 2900 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,019 psi | 45% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 38,841 psi | 70% | 2904 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 33,721 psi | 61% | 2848 fps | 99% |
| IMR 4064 | <<locked>> | 90% | 43,033 psi | 78% | 2979 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 44,411 psi | 81% | 2946 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 38,682 psi | 70% | 2946 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 36,970 psi | 67% | 2844 fps | 95.8% |
| Lovex D073.5 | <<locked>> | 80% | 41,075 psi | 75% | 2936 fps | 98% |
| Lovex D073.6 | <<locked>> | 80% | 32,967 psi | 60% | 2792 fps | 96.5% |
| Lovex S060 | <<locked>> | 84% | 40,959 psi | 74% | 2890 fps | 95.7% |
| Lovex S062 | <<locked>> | 84% | 34,954 psi | 63% | 2808 fps | 95.3% |
| Norma 201 | <<locked>> | 82% | 36,492 psi | 66% | 2835 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 34,229 psi | 62% | 2799 fps | 97.6% |
| Norma 203B | <<locked>> | 88% | 39,784 psi | 72% | 2963 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 90% | 42,409 psi | 77% | 3035 fps | 95.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 41,220 psi | 75% | 2976 fps | 95.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,306 psi | 73% | 2894 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,179 psi | 46% | 1804 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,756 psi | 76% | 2956 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 42,206 psi | 77% | 3084 fps | 95.4% |
| ReloadSwiss RS 60 | 60.2 gr | 86% | 32,518 psi | 59% | 2841 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 37,637 psi | 68% | 2848 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 34,563 psi | 63% | 2776 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 90% | 36,564 psi | 66% | 2887 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,967 psi | 60% | 2792 fps | 96.5% |
| Shooters World Precision | <<locked>> | 84% | 34,954 psi | 63% | 2808 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,237 psi | 80% | 2969 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 41,031 psi | 74% | 3012 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,121 psi | 80% | 2986 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 41,162 psi | 75% | 2963 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,969 psi | 65% | 2759 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,269 psi | 53% | 2598 fps | 97% |
| Somchem S321 | <<locked>> | 80% | 39,624 psi | 72% | 2927 fps | 97% |
| Somchem S335 | <<locked>> | 80% | 35,491 psi | 64% | 2762 fps | 98.6% |
| Somchem S341 | <<locked>> | 84% | 39,842 psi | 72% | 2920 fps | 95.2% |
| Somchem S355 | <<locked>> | 90% | 37,782 psi | 69% | 2900 fps | 95.3% |
| Somchem S365 | <<locked>> | 98% | 34,983 psi | 63% | 2913 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 41,002 psi | 74% | 2864 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,027 psi | 65% | 2772 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 80% | 31,009 psi | 56% | 2723 fps | 99% |
| Vihtavuori N140 | <<locked>> | 80% | 32,184 psi | 58% | 2723 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 88% | 33,692 psi | 61% | 2772 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 36,811 psi | 67% | 2838 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 31,024 psi | 56% | 2700 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 40,393 psi | 73% | 2923 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 35,549 psi | 65% | 2871 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 37,521 psi | 68% | 2897 fps | 95.3% |
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 74 powders for 8 x 75 RS loaded with the .323 | 138.9gr | Sax KJG-SR. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,258 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 138.9 gr projectile in 0.323" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon TrailBoss, ReloadSwiss RS 14 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, Hodgdon LEVERevolution rank at the top here: for 8 x 75 RS with the .323 | 138.9gr | Sax KJG-SR 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.