Load Specifications
Load data in caliber 8.5 x 63 R with .338 | 250gr | TWENTY-NINE ERTP bullet and 88 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 Power Pro 2000-MR and ReloadSwiss RS 52.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 48,849 psi | 89% | 2211 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 47,065 psi | 85% | 2231 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 48,660 psi | 88% | 2264 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,095 psi | 87% | 2280 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 48,501 psi | 88% | 2297 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 43,714 psi | 79% | 2297 fps | 97.7% |
| ADI AR 2206H | <<locked>> | 88% | 47,659 psi | 86% | 2280 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 94% | 48,733 psi | 88% | 2280 fps | 98.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 47,224 psi | 86% | 2247 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 88% | 49,719 psi | 90% | 2274 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 48,356 psi | 88% | 2329 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 49,806 psi | 90% | 2411 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 47,688 psi | 87% | 2300 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,124 psi | 89% | 2218 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 48,588 psi | 88% | 2316 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,295 psi | 80% | 2306 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 98% | 47,500 psi | 86% | 2385 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 46,818 psi | 85% | 2290 fps | 98.3% |
| Bofors RP3 | <<locked>> | 94% | 47,500 psi | 86% | 2310 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 49,676 psi | 90% | 2241 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 48,443 psi | 88% | 2313 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 46,615 psi | 85% | 2339 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 82% | 47,848 psi | 87% | 2251 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 48,254 psi | 88% | 2267 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 49,052 psi | 89% | 2316 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 88% | 48,080 psi | 87% | 2290 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,567 psi | 74% | 2211 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 49,342 psi | 90% | 2359 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,751 psi | 63% | 1381 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 49,472 psi | 90% | 2297 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 47,094 psi | 85% | 2283 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,182 psi | 87% | 2267 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,023 psi | 89% | 2247 fps | 95.7% |
| IMR 4198 | <<locked>> | 82% | 49,647 psi | 90% | 2185 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,090 psi | 76% | 2254 fps | 97.3% |
| IMR 4895 | <<locked>> | 92% | 49,748 psi | 90% | 2343 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 86% | 47,224 psi | 86% | 2247 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 82% | 46,688 psi | 85% | 2234 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 90% | 49,342 psi | 90% | 2306 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 48,399 psi | 88% | 2228 fps | 99.2% |
| Lovex S062 | <<locked>> | 92% | 47,630 psi | 86% | 2267 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 49,458 psi | 90% | 2297 fps | 97.3% |
| Norma 201 | <<locked>> | 90% | 49,850 psi | 90% | 2283 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 46,920 psi | 85% | 2251 fps | 100% |
| Norma 203B | <<locked>> | 92% | 47,761 psi | 87% | 2306 fps | 99.2% |
| Norma URPᴾ | <<locked>> | 100% | 44,222 psi | 80% | 2297 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 92% | 47,558 psi | 86% | 2323 fps | 99.1% |
| Ramshot TAC | <<locked>> | 86% | 47,369 psi | 86% | 2254 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 88% | 49,588 psi | 90% | 2320 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 48,356 psi | 88% | 2251 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,969 psi | 63% | 1411 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 46,949 psi | 85% | 2234 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 46,644 psi | 85% | 2254 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 47,616 psi | 86% | 2362 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 47,674 psi | 87% | 2395 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,555 psi | 79% | 2313 fps | 97.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,078 psi | 82% | 2329 fps | 96.6% |
| Rottweil R 901 | <<locked>> | 86% | 47,993 psi | 87% | 2231 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 47,079 psi | 85% | 2241 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 96% | 47,384 psi | 86% | 2300 fps | 99.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 49,458 psi | 90% | 2297 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 49,342 psi | 90% | 2306 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 47,630 psi | 86% | 2267 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 49,748 psi | 90% | 2251 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 49,081 psi | 89% | 2352 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 49,661 psi | 90% | 2231 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 48,472 psi | 88% | 2277 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 49,052 psi | 89% | 2300 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 48,863 psi | 89% | 2198 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 48,312 psi | 88% | 2201 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 49,501 psi | 90% | 2254 fps | 95.8% |
| Somchem S321 | <<locked>> | 84% | 47,703 psi | 87% | 2274 fps | 99.8% |
| Somchem S335 | <<locked>> | 88% | 48,153 psi | 87% | 2205 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 47,906 psi | 87% | 2274 fps | 99.1% |
| Somchem S355 | <<locked>> | 96% | 48,124 psi | 87% | 2300 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,175 psi | 71% | 2251 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 49,023 psi | 89% | 2178 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 48,834 psi | 89% | 2192 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 48,921 psi | 89% | 2254 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 47,427 psi | 86% | 2234 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 49,574 psi | 90% | 2287 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,543 psi | 84% | 2293 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 86% | 47,529 psi | 86% | 2247 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 48,602 psi | 88% | 2270 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,440 psi | 82% | 2300 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,848 psi | 87% | 2287 fps | 99.5% |
| Winchester 748 | <<locked>> | 88% | 49,487 psi | 90% | 2326 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 48,443 psi | 88% | 2306 fps | 99.6% |
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 2015 | <<locked>> | 80% | 40,625 psi | 74% | 2100 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 43,961 psi | 80% | 2188 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,083 psi | 60% | 2031 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,218 psi | 71% | 2149 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 31,328 psi | 57% | 2018 fps | 99.3% |
| Accurate 4350 | <<locked>> | 94% | 35,636 psi | 65% | 2162 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 37,318 psi | 68% | 2113 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 33,910 psi | 62% | 2031 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,276 psi | 71% | 2123 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 38,203 psi | 69% | 2123 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,339 psi | 82% | 2283 fps | 99.3% |
| Alliant Power Pro 2000-MR | 44.2 gr | 82% | 35,766 psi | 65% | 2162 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,647 psi | 56% | 2005 fps | 96.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,122 psi | 84% | 2182 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,301 psi | 60% | 2054 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 94% | 36,970 psi | 67% | 2169 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 32,387 psi | 59% | 2103 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,114 psi | 66% | 2110 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 29,863 psi | 54% | 2001 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,495 psi | 75% | 2119 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,086 psi | 67% | 2136 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,669 psi | 74% | 2241 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 44,599 psi | 81% | 2205 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,368 psi | 82% | 2231 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 37,942 psi | 69% | 2139 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 37,565 psi | 68% | 2123 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 31,633 psi | 57% | 2037 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,489 psi | 61% | 2090 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,614 psi | 46% | 1227 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,289 psi | 66% | 2083 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 36,289 psi | 66% | 2123 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,359 psi | 61% | 2014 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,151 psi | 84% | 2205 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 46,876 psi | 85% | 2149 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 34,838 psi | 63% | 2126 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 33,997 psi | 62% | 2080 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 39,276 psi | 71% | 2123 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 43,613 psi | 79% | 2188 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 35,404 psi | 64% | 2093 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 38,203 psi | 69% | 2067 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 32,996 psi | 60% | 2021 fps | 97.4% |
| Lovex S065 | <<locked>> | 94% | 41,220 psi | 75% | 2169 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 36,550 psi | 66% | 2077 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 36,506 psi | 66% | 2087 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 32,677 psi | 59% | 2044 fps | 95.9% |
| Norma URP | <<locked>> | 94% | 36,709 psi | 67% | 2165 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 32,010 psi | 58% | 2047 fps | 95.2% |
| Ramshot TAC | <<locked>> | 82% | 41,568 psi | 75% | 2162 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,174 psi | 69% | 2139 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,424 psi | 77% | 2162 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,918 psi | 47% | 1260 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,121 psi | 80% | 2195 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 43,903 psi | 80% | 2211 fps | 95.2% |
| ReloadSwiss RS 52 | 41.8 gr | 80% | 34,127 psi | 62% | 2126 fps | 95.7% |
| ReloadSwiss RS 60 | 42.5 gr | 80% | 28,500 psi | 52% | 2014 fps | 96.7% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 38,218 psi | 69% | 2221 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 42,119 psi | 76% | 2277 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 40,437 psi | 73% | 2119 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 34,780 psi | 63% | 2034 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 29,979 psi | 54% | 1998 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 41,220 psi | 75% | 2169 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,404 psi | 64% | 2093 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 32,996 psi | 60% | 2021 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,441 psi | 84% | 2205 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,531 psi | 57% | 2041 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,876 psi | 85% | 2195 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 39,508 psi | 72% | 2139 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,795 psi | 65% | 2083 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,392 psi | 70% | 2047 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,415 psi | 57% | 1939 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 46,340 psi | 84% | 2211 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 41,974 psi | 76% | 2188 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 37,753 psi | 69% | 2051 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 36,709 psi | 67% | 2096 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 29,370 psi | 53% | 1965 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 27,151 psi | 49% | 1985 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 43,511 psi | 79% | 2106 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,450 psi | 70% | 2047 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,678 psi | 61% | 2031 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,447 psi | 63% | 2034 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 27,702 psi | 50% | 1916 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 36,289 psi | 66% | 2123 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 39,044 psi | 71% | 2116 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 33,214 psi | 60% | 2028 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 94% | 37,492 psi | 68% | 2169 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,400 psi | 55% | 1975 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 37,985 psi | 69% | 2152 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,867 psi | 63% | 2087 fps | 97.2% |
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 88 powders for 8.5 x 63 R loaded with the .338 | 250gr | TWENTY-NINE ERTP. 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 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 63–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 8.5 x 63 R with the .338 | 250gr | TWENTY-NINE ERTP 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.