Load Specifications
Load data in caliber 8.5 x 63 R with .338 | 210gr | Impala RNFP KO bullet and 75 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 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 49,777 psi | 90% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 48,211 psi | 87% | 2503 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 49,110 psi | 89% | 2546 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 47,993 psi | 87% | 2536 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,254 psi | 88% | 2612 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 86% | 48,457 psi | 88% | 2546 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 92% | 48,950 psi | 89% | 2539 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 47,703 psi | 87% | 2507 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 84% | 47,253 psi | 86% | 2503 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 46,775 psi | 85% | 2621 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 48,457 psi | 88% | 2562 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 90% | 49,153 psi | 89% | 2579 fps | 98.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,645 psi | 86% | 2612 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 48,037 psi | 87% | 2648 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 47,152 psi | 86% | 2546 fps | 97.5% |
| Bofors RP3 | <<locked>> | 92% | 48,762 psi | 88% | 2579 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 49,661 psi | 90% | 2493 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 86% | 49,327 psi | 90% | 2579 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 82% | 47,137 psi | 86% | 2602 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 90% | 46,992 psi | 85% | 2530 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 86% | 48,849 psi | 89% | 2556 fps | 99.1% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,932 psi | 80% | 2507 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 46,992 psi | 85% | 2579 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 64% | 1575 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 49,676 psi | 90% | 2556 fps | 99.1% |
| IMR 3031 | <<locked>> | 86% | 47,993 psi | 87% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 48,660 psi | 88% | 2526 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,977 psi | 83% | 2559 fps | 97.2% |
| IMR 4895 | <<locked>> | 88% | 47,297 psi | 86% | 2559 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 84% | 47,703 psi | 87% | 2507 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 86% | 47,442 psi | 86% | 2530 fps | 99.9% |
| Lovex S060 | <<locked>> | 86% | 48,631 psi | 88% | 2484 fps | 98.7% |
| Lovex S062 | <<locked>> | 90% | 48,631 psi | 88% | 2530 fps | 99.5% |
| Lovex S065 | <<locked>> | 96% | 47,572 psi | 86% | 2513 fps | 95.9% |
| Norma 201 | <<locked>> | 86% | 47,979 psi | 87% | 2507 fps | 99.4% |
| Norma 202 | <<locked>> | 86% | 47,601 psi | 86% | 2510 fps | 100% |
| Norma 203B | <<locked>> | 90% | 48,356 psi | 88% | 2566 fps | 98.7% |
| Norma URPᴾ | <<locked>> | 100% | 47,935 psi | 87% | 2605 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 90% | 48,008 psi | 87% | 2582 fps | 98.5% |
| Ramshot TAC | <<locked>> | 84% | 47,834 psi | 87% | 2507 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 49,777 psi | 90% | 2575 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 48,588 psi | 88% | 2503 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,621 psi | 65% | 1611 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 48,211 psi | 87% | 2628 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 48,080 psi | 87% | 2661 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,659 psi | 86% | 2628 fps | 97.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,776 psi | 89% | 2641 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 84% | 49,632 psi | 90% | 2503 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 48,312 psi | 88% | 2503 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 94% | 48,675 psi | 88% | 2566 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 47,572 psi | 86% | 2513 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 47,442 psi | 86% | 2530 fps | 99.9% |
| Shooters World Precision | <<locked>> | 90% | 48,631 psi | 88% | 2530 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 49,603 psi | 90% | 2615 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 49,153 psi | 89% | 2536 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 49,458 psi | 90% | 2562 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 49,211 psi | 89% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 48,762 psi | 88% | 2457 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 48,356 psi | 88% | 2536 fps | 99.6% |
| Somchem S335 | <<locked>> | 86% | 48,849 psi | 89% | 2464 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 48,225 psi | 88% | 2530 fps | 98.5% |
| Somchem S355 | <<locked>> | 94% | 49,385 psi | 90% | 2566 fps | 99.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,033 psi | 78% | 2559 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 82% | 49,356 psi | 90% | 2434 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 49,139 psi | 89% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 49,850 psi | 90% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 47,921 psi | 87% | 2493 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 47,311 psi | 86% | 2507 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 98% | 47,210 psi | 86% | 2552 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 84% | 47,805 psi | 87% | 2503 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 90% | 49,226 psi | 89% | 2533 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,400 psi | 90% | 2608 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 48,051 psi | 87% | 2539 fps | 99% |
| Winchester 748 | <<locked>> | 86% | 49,792 psi | 90% | 2592 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 49,052 psi | 89% | 2569 fps | 99.1% |
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% | 44,454 psi | 81% | 2395 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,985 psi | 69% | 2336 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,178 psi | 78% | 2451 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 35,897 psi | 65% | 2320 fps | 99.4% |
| Accurate 4350 | <<locked>> | 94% | 39,900 psi | 72% | 2467 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 40,495 psi | 73% | 2402 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 36,767 psi | 67% | 2310 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,322 psi | 77% | 2411 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 41,640 psi | 76% | 2418 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 38,870 psi | 71% | 2457 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,113 psi | 62% | 2290 fps | 96.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,506 psi | 66% | 2339 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,103 psi | 73% | 2464 fps | 95.4% |
| Alliant Reloder-17 | 53.1 gr | 86% | 35,433 psi | 64% | 2388 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,088 psi | 71% | 2395 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 33,663 psi | 61% | 2290 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,324 psi | 80% | 2408 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,712 psi | 74% | 2431 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,106 psi | 80% | 2546 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 86% | 41,611 psi | 76% | 2434 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 40,814 psi | 74% | 2411 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,911 psi | 63% | 2323 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,579 psi | 66% | 2379 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,455 psi | 48% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,146 psi | 71% | 2369 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 39,726 psi | 72% | 2418 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,463 psi | 66% | 2297 fps | 95.3% |
| IMR 4831 | <<locked>> | 94% | 38,406 psi | 70% | 2418 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,333 psi | 68% | 2369 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 80% | 42,322 psi | 77% | 2411 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 80% | 39,465 psi | 72% | 2392 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 41,104 psi | 75% | 2349 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 36,564 psi | 66% | 2310 fps | 97.4% |
| Lovex S065 | <<locked>> | 94% | 45,092 psi | 82% | 2470 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 40,263 psi | 73% | 2369 fps | 98.2% |
| Norma 202 | <<locked>> | 80% | 40,030 psi | 73% | 2379 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 35,998 psi | 65% | 2329 fps | 95.8% |
| Norma URP | <<locked>> | 94% | 40,176 psi | 73% | 2461 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,172 psi | 64% | 2333 fps | 95.1% |
| Ramshot TAC | <<locked>> | 82% | 44,889 psi | 81% | 2457 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,379 psi | 75% | 2428 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,629 psi | 83% | 2454 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,745 psi | 49% | 1440 fps | 100% |
| ReloadSwiss RS 52 | 48.7 gr | 80% | 37,492 psi | 68% | 2421 fps | 95.5% |
| ReloadSwiss RS 60 | 49.4 gr | 80% | 31,357 psi | 57% | 2297 fps | 96.6% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,192 psi | 77% | 2526 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 45,672 psi | 83% | 2585 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 44,512 psi | 81% | 2418 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 38,406 psi | 70% | 2323 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 80% | 31,937 psi | 58% | 2241 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,092 psi | 82% | 2470 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,465 psi | 72% | 2392 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 36,564 psi | 66% | 2310 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,695 psi | 67% | 2372 fps | 95.8% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,149 psi | 78% | 2431 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,015 psi | 71% | 2372 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,510 psi | 75% | 2333 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,403 psi | 62% | 2211 fps | 99.4% |
| Somchem S321 | <<locked>> | 80% | 45,397 psi | 82% | 2487 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 41,118 psi | 75% | 2336 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 39,885 psi | 72% | 2382 fps | 96.8% |
| Somchem S355 | <<locked>> | 80% | 32,880 psi | 60% | 2251 fps | 95.2% |
| Somchem S365 | <<locked>> | 88% | 30,487 psi | 55% | 2274 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 46,688 psi | 85% | 2395 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,452 psi | 75% | 2329 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,231 psi | 68% | 2320 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,724 psi | 68% | 2320 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 31,067 psi | 56% | 2192 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 39,595 psi | 72% | 2411 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 42,264 psi | 77% | 2408 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 36,535 psi | 66% | 2310 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 94% | 41,191 psi | 75% | 2464 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,417 psi | 61% | 2251 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 41,133 psi | 75% | 2444 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,159 psi | 69% | 2375 fps | 97.1% |
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 75 powders for 8.5 x 63 R loaded with the .338 | 210gr | Impala RNFP KO. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,661 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,661 fps. Accurate 4350 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 210.0 gr projectile in 0.338" calls for a 1:15.0 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 Reloder-17, ReloadSwiss RS 52 rank at the top here: for 8.5 x 63 R with the .338 | 210gr | Impala RNFP KO 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.