Load Specifications
Load data in caliber 8.5 x 63 R with .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC 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 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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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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>> | 82% | 49,371 psi | 90% | 2270 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 47,500 psi | 86% | 2293 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 48,863 psi | 89% | 2343 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 47,485 psi | 86% | 2333 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 49,443 psi | 90% | 2438 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 84% | 48,457 psi | 88% | 2352 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 90% | 49,182 psi | 89% | 2352 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 47,616 psi | 86% | 2313 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 47,659 psi | 86% | 2293 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 47,123 psi | 86% | 2441 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 48,849 psi | 89% | 2372 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 49,443 psi | 90% | 2388 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 48,312 psi | 88% | 2441 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 94% | 48,747 psi | 88% | 2470 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,550 psi | 66% | 2264 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,161 psi | 73% | 2388 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 47,587 psi | 86% | 2362 fps | 99.2% |
| Bofors RP3 | <<locked>> | 90% | 49,124 psi | 89% | 2385 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 49,632 psi | 90% | 2356 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 49,559 psi | 90% | 2300 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 49,487 psi | 90% | 2382 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 46,876 psi | 85% | 2346 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 96% | 49,240 psi | 89% | 2434 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 48,878 psi | 89% | 2362 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,413 psi | 86% | 2379 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 47,558 psi | 86% | 2388 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 49,588 psi | 90% | 2461 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,259 psi | 64% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 46,862 psi | 85% | 2320 fps | 99.8% |
| IMR 3031 | <<locked>> | 84% | 48,428 psi | 88% | 2349 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 48,834 psi | 89% | 2339 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,892 psi | 89% | 2316 fps | 96.9% |
| IMR 4350 | <<locked>> | 98% | 49,661 psi | 90% | 2382 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,515 psi | 88% | 2339 fps | 96.8% |
| IMR 4831 | <<locked>> | 98% | 47,021 psi | 85% | 2385 fps | 99.1% |
| IMR 4895 | <<locked>> | 86% | 47,514 psi | 86% | 2369 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 82% | 47,616 psi | 86% | 2313 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 47,543 psi | 86% | 2333 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,370 psi | 88% | 2293 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 48,544 psi | 88% | 2339 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 47,630 psi | 86% | 2336 fps | 98% |
| Lovex S070 | <<locked>> | 96% | 48,254 psi | 88% | 2362 fps | 97.1% |
| Norma 201 | <<locked>> | 84% | 47,340 psi | 86% | 2306 fps | 100% |
| Norma 202 | <<locked>> | 84% | 47,747 psi | 87% | 2313 fps | 100% |
| Norma 203B | <<locked>> | 88% | 48,689 psi | 88% | 2379 fps | 99.8% |
| Norma URP | <<locked>> | 98% | 48,791 psi | 89% | 2428 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 88% | 48,733 psi | 88% | 2402 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 47,776 psi | 87% | 2421 fps | 97.7% |
| Ramshot TAC | <<locked>> | 82% | 47,630 psi | 86% | 2323 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 46,934 psi | 85% | 2339 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,766 psi | 65% | 1480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,471 psi | 86% | 2333 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 49,356 psi | 90% | 2441 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 48,733 psi | 88% | 2474 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 48,834 psi | 89% | 2454 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 49,168 psi | 89% | 2477 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 82% | 48,617 psi | 88% | 2297 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 47,776 psi | 87% | 2306 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 49,023 psi | 89% | 2379 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 49,632 psi | 90% | 2356 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,630 psi | 86% | 2336 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 84% | 47,543 psi | 86% | 2333 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 48,544 psi | 88% | 2339 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 48,254 psi | 88% | 2362 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 47,268 psi | 86% | 2385 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 49,037 psi | 89% | 2349 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 49,850 psi | 90% | 2375 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,023 psi | 89% | 2260 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 48,791 psi | 89% | 2260 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,761 psi | 87% | 2297 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 48,356 psi | 88% | 2260 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 48,486 psi | 88% | 2343 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 49,617 psi | 90% | 2379 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,586 psi | 85% | 2431 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 49,197 psi | 89% | 2251 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 47,297 psi | 86% | 2283 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 48,080 psi | 87% | 2297 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 47,659 psi | 86% | 2320 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 48,182 psi | 87% | 2382 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 47,718 psi | 87% | 2310 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 49,240 psi | 89% | 2333 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 47,195 psi | 86% | 2385 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,349 psi | 71% | 2326 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 48,530 psi | 88% | 2369 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 47,108 psi | 85% | 2349 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 49,240 psi | 89% | 2434 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,619 psi | 59% | 2254 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 86% | 49,429 psi | 90% | 2382 fps | 99.9% |
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% | 46,514 psi | 84% | 2234 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,044 psi | 71% | 2172 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,788 psi | 83% | 2300 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,927 psi | 67% | 2165 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,677 psi | 59% | 2149 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 42,598 psi | 77% | 2260 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 36,448 psi | 66% | 2139 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,672 psi | 81% | 2267 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 44,744 psi | 81% | 2254 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,609 psi | 70% | 2287 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,853 psi | 65% | 2156 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,406 psi | 70% | 2208 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,533 psi | 61% | 2162 fps | 95.8% |
| Alliant Reloder-17 | 49.1 gr | 80% | 30,777 psi | 56% | 2126 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,776 psi | 52% | 2080 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,070 psi | 64% | 2280 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,669 psi | 76% | 2267 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 35,186 psi | 64% | 2156 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 43,903 psi | 80% | 2264 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,528 psi | 84% | 2257 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,279 psi | 79% | 2290 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 36,303 psi | 66% | 2162 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 40,553 psi | 74% | 2290 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,989 psi | 78% | 2270 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,892 psi | 52% | 2031 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,870 psi | 71% | 2247 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 94% | 46,209 psi | 84% | 2405 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 48% | 1289 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,394 psi | 75% | 2231 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 42,656 psi | 77% | 2267 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,247 psi | 69% | 2165 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,323 psi | 79% | 2228 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 43,758 psi | 79% | 2287 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,033 psi | 78% | 2251 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 31,894 psi | 58% | 2113 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,334 psi | 71% | 2231 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 44,672 psi | 81% | 2267 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 41,655 psi | 76% | 2247 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,047 psi | 78% | 2211 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 38,101 psi | 69% | 2169 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 37,608 psi | 68% | 2165 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 40,074 psi | 73% | 2228 fps | 95% |
| Norma 201 | <<locked>> | 80% | 41,858 psi | 76% | 2221 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 42,148 psi | 76% | 2231 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,797 psi | 69% | 2198 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 33,402 psi | 61% | 2152 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 37,246 psi | 68% | 2211 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 39,552 psi | 72% | 2280 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 44,556 psi | 81% | 2277 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,816 psi | 80% | 2290 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,658 psi | 48% | 1319 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,073 psi | 71% | 2192 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,176 psi | 73% | 2297 fps | 98.4% |
| ReloadSwiss RS 60 | 49.1 gr | 80% | 32,779 psi | 59% | 2182 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,750 psi | 59% | 2165 fps | 95.1% |
| ReloadSwiss RS 70 | 56.1 gr | 90% | 37,681 psi | 68% | 2270 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 45,876 psi | 83% | 2257 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,001 psi | 73% | 2185 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 33,199 psi | 60% | 2110 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 43,903 psi | 80% | 2264 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,608 psi | 68% | 2165 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,655 psi | 76% | 2247 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,101 psi | 69% | 2169 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 40,074 psi | 73% | 2228 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,243 psi | 62% | 2156 fps | 97.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,641 psi | 77% | 2251 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,249 psi | 75% | 2238 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,395 psi | 79% | 2182 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,955 psi | 65% | 2070 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,800 psi | 76% | 2205 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 42,859 psi | 78% | 2182 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,453 psi | 77% | 2251 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 34,171 psi | 62% | 2116 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 24,772 psi | 45% | 1972 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 43,656 psi | 79% | 2175 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,233 psi | 71% | 2165 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,784 psi | 72% | 2175 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,387 psi | 59% | 2064 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 32,822 psi | 60% | 2110 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,643 psi | 81% | 2264 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 38,363 psi | 70% | 2169 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,156 psi | 62% | 2156 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 92% | 30,516 psi | 55% | 2142 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,834 psi | 52% | 1998 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 44,106 psi | 80% | 2303 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 40,553 psi | 74% | 2290 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,645 psi | 52% | 2139 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,538 psi | 74% | 2241 fps | 99.2% |
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 | Alaska Bullet Works Kodiak PP SPBC. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,477 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,477 fps. Alliant Reloder-23 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 59–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 8.5 x 63 R with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC 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.