Load Specifications
Load data in caliber 8 x 60 RS with .323 | 220gr | Sierra GameKing bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and ReloadSwiss RS 62.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 43,207 psi | 88% | 2257 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 43,395 psi | 88% | 2297 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 44,411 psi | 90% | 2379 fps | 98% |
| ADI AR 2206H | <<locked>> | 82% | 42,061 psi | 85% | 2267 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 88% | 43,207 psi | 88% | 2274 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 44,135 psi | 90% | 2274 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 82% | 43,743 psi | 89% | 2267 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 43,540 psi | 88% | 2388 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 42,192 psi | 86% | 2287 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 86% | 42,743 psi | 87% | 2300 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 44,440 psi | 90% | 2385 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 92% | 41,756 psi | 85% | 2369 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,344 psi | 68% | 2198 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 43,961 psi | 89% | 2320 fps | 98% |
| Bofors RP3 | <<locked>> | 88% | 41,785 psi | 85% | 2293 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 42,424 psi | 86% | 2293 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 88% | 43,120 psi | 87% | 2300 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 42,366 psi | 86% | 2277 fps | 99% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,468 psi | 88% | 2333 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 43,511 psi | 88% | 2346 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,983 psi | 71% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 43,511 psi | 88% | 2280 fps | 99.1% |
| IMR 3031 | <<locked>> | 84% | 44,367 psi | 90% | 2316 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 42,612 psi | 86% | 2257 fps | 98.3% |
| IMR 4831 | <<locked>> | 98% | 42,641 psi | 86% | 2336 fps | 97.7% |
| IMR 4895 | <<locked>> | 86% | 43,729 psi | 89% | 2326 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 82% | 44,135 psi | 90% | 2274 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 84% | 43,381 psi | 88% | 2293 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 42,656 psi | 87% | 2215 fps | 98.6% |
| Lovex S062 | <<locked>> | 86% | 42,308 psi | 86% | 2260 fps | 99.4% |
| Lovex S065 | <<locked>> | 94% | 43,903 psi | 89% | 2287 fps | 96.4% |
| Norma 201 | <<locked>> | 84% | 43,888 psi | 89% | 2270 fps | 99.6% |
| Norma 202 | <<locked>> | 84% | 43,932 psi | 89% | 2277 fps | 100% |
| Norma 203B | <<locked>> | 86% | 41,989 psi | 85% | 2290 fps | 98.6% |
| Norma URP | <<locked>> | 96% | 41,930 psi | 85% | 2333 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 88% | 44,425 psi | 90% | 2349 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 98% | 43,801 psi | 89% | 2365 fps | 95.8% |
| Ramshot TAC | <<locked>> | 82% | 44,266 psi | 90% | 2280 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 43,395 psi | 88% | 2300 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,259 psi | 72% | 1476 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 41,829 psi | 85% | 2343 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 44,541 psi | 90% | 2425 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 44,266 psi | 90% | 2402 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 42,090 psi | 85% | 2359 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 86% | 44,382 psi | 90% | 2270 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 90% | 41,959 psi | 85% | 2290 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 43,903 psi | 89% | 2287 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 43,381 psi | 88% | 2293 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 42,308 psi | 86% | 2260 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 43,134 psi | 87% | 2336 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 42,061 psi | 85% | 2254 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 43,163 psi | 88% | 2287 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 43,033 psi | 87% | 2192 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 42,496 psi | 86% | 2195 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 42,351 psi | 86% | 2195 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 41,887 psi | 85% | 2257 fps | 98.4% |
| Somchem S355 | <<locked>> | 90% | 42,902 psi | 87% | 2293 fps | 99% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,206 psi | 86% | 2375 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 82% | 43,207 psi | 88% | 2188 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 43,511 psi | 88% | 2254 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 44,469 psi | 90% | 2264 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 43,787 psi | 89% | 2280 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 96% | 44,019 psi | 89% | 2333 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 82% | 44,324 psi | 90% | 2274 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 86% | 42,772 psi | 87% | 2260 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 42,931 psi | 87% | 2333 fps | 97.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,273 psi | 72% | 2264 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 41,872 psi | 85% | 2274 fps | 98.9% |
| Winchester 748 | <<locked>> | 82% | 43,453 psi | 88% | 2313 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 42,395 psi | 86% | 2290 fps | 99% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 35,476 psi | 72% | 2136 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 33,591 psi | 68% | 2126 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,823 psi | 69% | 2192 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 39,479 psi | 80% | 2221 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 33,634 psi | 68% | 2093 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,495 psi | 84% | 2231 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 40,843 psi | 83% | 2228 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 35,476 psi | 72% | 2231 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,953 psi | 67% | 2113 fps | 97.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,389 psi | 72% | 2162 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,983 psi | 71% | 2201 fps | 95.3% |
| Alliant Reloder-17 | 43.3 gr | 82% | 30,182 psi | 61% | 2116 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,386 psi | 64% | 2152 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,392 psi | 78% | 2221 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 32,227 psi | 65% | 2113 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,595 psi | 80% | 2247 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 38,014 psi | 77% | 2208 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 39,813 psi | 81% | 2231 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,965 psi | 61% | 2067 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,665 psi | 72% | 2201 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,005 psi | 53% | 1286 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,363 psi | 78% | 2192 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 39,044 psi | 79% | 2234 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,259 psi | 72% | 2119 fps | 96.4% |
| IMR 4831 | <<locked>> | 92% | 35,186 psi | 71% | 2198 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 36,216 psi | 73% | 2188 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 41,495 psi | 84% | 2231 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 37,869 psi | 77% | 2205 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 40,103 psi | 81% | 2172 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 35,041 psi | 71% | 2126 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 39,073 psi | 79% | 2205 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 38,696 psi | 78% | 2182 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 38,957 psi | 79% | 2198 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,795 psi | 71% | 2156 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 34,708 psi | 70% | 2192 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 34,069 psi | 69% | 2159 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 96% | 41,205 psi | 84% | 2320 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 41,423 psi | 84% | 2234 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,582 psi | 82% | 2251 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,107 psi | 53% | 1316 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,434 psi | 74% | 2241 fps | 96.7% |
| ReloadSwiss RS 60 | 42.3 gr | 80% | 30,240 psi | 61% | 2129 fps | 97.9% |
| ReloadSwiss RS 62 | 48.6 gr | 92% | 36,172 psi | 73% | 2254 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,610 psi | 80% | 2310 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 36,999 psi | 75% | 2146 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 30,327 psi | 62% | 2064 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,073 psi | 79% | 2205 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,869 psi | 77% | 2205 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 35,041 psi | 71% | 2126 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,343 psi | 64% | 2103 fps | 95.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,479 psi | 80% | 2208 fps | 96.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,956 psi | 77% | 2195 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,350 psi | 82% | 2149 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,228 psi | 67% | 2037 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,784 psi | 81% | 2152 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,117 psi | 79% | 2208 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 31,299 psi | 63% | 2070 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 27,296 psi | 55% | 2054 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 40,524 psi | 82% | 2149 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,911 psi | 73% | 2133 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,782 psi | 75% | 2142 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,776 psi | 60% | 2021 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 90% | 36,434 psi | 74% | 2195 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 41,568 psi | 84% | 2231 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 35,317 psi | 72% | 2133 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 35,389 psi | 72% | 2195 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 33,156 psi | 67% | 2218 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,400 psi | 62% | 2044 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 40,495 psi | 82% | 2264 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,202 psi | 75% | 2198 fps | 98% |
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 92 powders for 8 x 60 RS loaded with the .323 | 220gr | Sierra GameKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,425 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,425 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 8 x 60 RS with the .323 | 220gr | Sierra GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, ADI AR 2209 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.