Load Specifications
Load data in caliber 8 x 50 R with .323 | 220gr | Sierra GameKing bullet and 82 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 52 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.
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: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 45,455 psi | 88% | 2234 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 46,514 psi | 90% | 2287 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 43,729 psi | 85% | 2274 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 45,208 psi | 88% | 2323 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 45,208 psi | 88% | 2323 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 43,497 psi | 84% | 2306 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 44,150 psi | 86% | 2293 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 96% | 44,976 psi | 87% | 2287 fps | 98% |
| ADI AR 2219 | <<locked>> | 82% | 45,600 psi | 89% | 2287 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 43,976 psi | 85% | 2260 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 90% | 44,889 psi | 87% | 2290 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 44,628 psi | 87% | 2343 fps | 99.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 46,108 psi | 90% | 2411 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 46,340 psi | 90% | 2349 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 84% | 45,614 psi | 89% | 2241 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 44,527 psi | 86% | 2323 fps | 98.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 38,580 psi | 75% | 2257 fps | 95.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 43,859 psi | 85% | 2388 fps | 98.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 45,150 psi | 88% | 2192 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 46,137 psi | 90% | 2343 fps | 97.9% |
| Bofors RP3 | <<locked>> | 98% | 45,890 psi | 89% | 2356 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 44,077 psi | 86% | 2218 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 90% | 44,657 psi | 87% | 2329 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 88% | 46,151 psi | 90% | 2395 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 86% | 43,845 psi | 85% | 2260 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 44,483 psi | 86% | 2283 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 45,034 psi | 87% | 2320 fps | 97% |
| Hodgdon H4895 | <<locked>> | 90% | 44,396 psi | 86% | 2303 fps | 99% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 34,780 psi | 68% | 2162 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 45,324 psi | 88% | 2365 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,736 psi | 66% | 1381 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 44,744 psi | 87% | 2290 fps | 98.9% |
| IMR 3031 | <<locked>> | 94% | 44,222 psi | 86% | 2320 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 46,557 psi | 90% | 2300 fps | 98.5% |
| IMR 4198 | <<locked>> | 82% | 44,266 psi | 86% | 2175 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 45,527 psi | 88% | 2349 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 88% | 43,976 psi | 85% | 2260 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 86% | 46,325 psi | 90% | 2293 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 92% | 44,875 psi | 87% | 2316 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 45,426 psi | 88% | 2241 fps | 98.6% |
| Lovex S062 | <<locked>> | 96% | 46,354 psi | 90% | 2313 fps | 99.6% |
| Norma 201 | <<locked>> | 92% | 45,876 psi | 89% | 2293 fps | 99.5% |
| Norma 202 | <<locked>> | 92% | 45,847 psi | 89% | 2303 fps | 100% |
| Norma 203B | <<locked>> | 96% | 46,369 psi | 90% | 2352 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 94% | 43,656 psi | 85% | 2326 fps | 98.3% |
| Ramshot TAC | <<locked>> | 88% | 44,164 psi | 86% | 2264 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 90% | 45,818 psi | 89% | 2329 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 45,324 psi | 88% | 2264 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,997 psi | 66% | 1414 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 43,990 psi | 85% | 2257 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 46,238 psi | 90% | 2408 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 43,830 psi | 85% | 2398 fps | 100% |
| Rottweil R 901 | <<locked>> | 88% | 44,701 psi | 87% | 2251 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 46,267 psi | 90% | 2290 fps | 99.5% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 45,426 psi | 88% | 2343 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 44,875 psi | 87% | 2316 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 46,354 psi | 90% | 2313 fps | 99.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 43,801 psi | 85% | 2224 fps | 99% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 45,977 psi | 89% | 2297 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 44,744 psi | 87% | 2352 fps | 98.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 46,441 psi | 90% | 2251 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 44,556 psi | 87% | 2280 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 45,484 psi | 88% | 2313 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 45,687 psi | 89% | 2215 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 44,817 psi | 87% | 2218 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 44,382 psi | 86% | 2293 fps | 99.5% |
| Somchem S335 | <<locked>> | 90% | 44,614 psi | 87% | 2218 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 44,353 psi | 86% | 2283 fps | 98.4% |
| Somchem S355 | <<locked>> | 98% | 44,121 psi | 86% | 2310 fps | 98.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 33,460 psi | 65% | 2201 fps | 97.7% |
| Unknown powderᴾ | <<locked>> | 100% | 41,597 psi | 81% | 2297 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 86% | 46,079 psi | 89% | 2201 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 45,440 psi | 88% | 2208 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 44,628 psi | 87% | 2270 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 46,456 psi | 90% | 2287 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,049 psi | 87% | 2293 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 39,842 psi | 77% | 2244 fps | 96% |
| Vihtavuori N530 | <<locked>> | 88% | 44,121 psi | 86% | 2260 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 94% | 44,570 psi | 87% | 2283 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 41,553 psi | 81% | 2244 fps | 98.2% |
| Winchester 748 | <<locked>> | 88% | 46,151 psi | 90% | 2352 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 46,180 psi | 90% | 2343 fps | 99.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 35,389 psi | 69% | 2083 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 38,072 psi | 74% | 2162 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 27,789 psi | 54% | 2008 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 31,966 psi | 62% | 2103 fps | 98.6% |
| Accurate 2520 | <<locked>> | 80% | 31,966 psi | 62% | 2103 fps | 98.6% |
| Accurate 4064 | <<locked>> | 80% | 26,324 psi | 51% | 1988 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 80% | 32,372 psi | 63% | 2080 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 86% | 33,547 psi | 65% | 2087 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 42,467 psi | 82% | 2241 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,258 psi | 67% | 2093 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 80% | 32,663 psi | 63% | 2106 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 38,986 psi | 76% | 2247 fps | 98.2% |
| Alliant Power Pro 2000-MR | 37.6 gr | 86% | 35,534 psi | 69% | 2218 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 28,065 psi | 55% | 2014 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,509 psi | 79% | 2169 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 32,561 psi | 63% | 2110 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 98% | 36,376 psi | 71% | 2215 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 90% | 31,894 psi | 62% | 2152 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,322 psi | 82% | 2152 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 35,679 psi | 69% | 2162 fps | 95.3% |
| Bofors RP3 | <<locked>> | 84% | 28,921 psi | 56% | 2057 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,608 psi | 71% | 2096 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,807 psi | 62% | 2106 fps | 97.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 35,215 psi | 68% | 2201 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 36,187 psi | 70% | 2142 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 41,539 psi | 81% | 2241 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 39,479 psi | 77% | 2231 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 32,503 psi | 63% | 2090 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 32,779 psi | 64% | 2119 fps | 95.8% |
| Hodgdon LEVERevolution | 34.4 gr | 82% | 29,254 psi | 57% | 2060 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,164 psi | 49% | 1234 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 31,357 psi | 61% | 2047 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 28,660 psi | 56% | 2044 fps | 99.5% |
| IMR 4064 | <<locked>> | 86% | 32,474 psi | 63% | 2060 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 41,495 psi | 81% | 2136 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 31,227 psi | 61% | 2093 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 34,258 psi | 67% | 2093 fps | 97.5% |
| Lovex D073.5 | <<locked>> | 80% | 37,637 psi | 73% | 2162 fps | 99% |
| Lovex D073.6 | <<locked>> | 80% | 29,950 psi | 58% | 2064 fps | 98.1% |
| Lovex S060 | <<locked>> | 80% | 33,736 psi | 66% | 2037 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 28,427 psi | 55% | 1991 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 31,807 psi | 62% | 2047 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 31,633 psi | 61% | 2064 fps | 99% |
| Norma 203B | <<locked>> | 84% | 31,894 psi | 62% | 2100 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 86% | 33,765 psi | 66% | 2149 fps | 95.6% |
| Ramshot TAC | <<locked>> | 86% | 41,684 psi | 81% | 2221 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 32,996 psi | 64% | 2106 fps | 95.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 37,478 psi | 73% | 2136 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,237 psi | 49% | 1263 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,624 psi | 75% | 2172 fps | 99.4% |
| ReloadSwiss RS 52 | 35.6 gr | 84% | 33,402 psi | 65% | 2178 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 26,411 psi | 51% | 2018 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 35,404 psi | 69% | 2096 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 30,429 psi | 59% | 2011 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 86% | 28,877 psi | 56% | 2047 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,950 psi | 58% | 2064 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 28,427 psi | 55% | 1991 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,843 psi | 79% | 2178 fps | 98.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 42,975 psi | 83% | 2251 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 32,895 psi | 64% | 2136 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 41,220 psi | 80% | 2178 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 39,102 psi | 76% | 2192 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 31,067 psi | 60% | 2054 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,910 psi | 66% | 2028 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,456 psi | 53% | 1923 fps | 98.6% |
| Somchem S321 | <<locked>> | 80% | 36,216 psi | 70% | 2159 fps | 98.3% |
| Somchem S335 | <<locked>> | 80% | 33,069 psi | 64% | 2031 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 31,647 psi | 61% | 2060 fps | 95% |
| Somchem S355 | <<locked>> | 86% | 30,298 psi | 59% | 2060 fps | 95.5% |
| Somchem S365 | <<locked>> | 94% | 28,050 psi | 54% | 2073 fps | 95.4% |
| Unknown powder | <<locked>> | 98% | 39,175 psi | 76% | 2254 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 38,609 psi | 75% | 2096 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,779 psi | 66% | 2034 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 28,790 psi | 56% | 2011 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 29,907 psi | 58% | 2014 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 25,541 psi | 50% | 1929 fps | 95% |
| Vihtavuori N160 | <<locked>> | 98% | 37,463 psi | 73% | 2205 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 34,098 psi | 66% | 2090 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 28,732 psi | 56% | 2005 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 32,068 psi | 62% | 2067 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 35,085 psi | 68% | 2169 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,376 psi | 73% | 2201 fps | 97.7% |
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 107 powders for 8 x 50 R loaded with the .323 | 220gr | Sierra GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,411 fps; across all powders the maximum-charge window runs from 1,381 fps to 2,411 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 53–90 %, 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 4350, Alliant Reloder-16, Alliant Reloder-17 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 52, Hodgdon LEVERevolution rank at the top here: for 8 x 50 R 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, Alliant Reloder-23, 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.