Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:215 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:8.5 x 55 Blaser load data
Case Length (l3):2.15"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:77 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:23.62"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:15.5
Load data in caliber 8.5 x 55 Blaser with .338 | 215gr | Sierra GameKing bullet and 103 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 60 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>> | 88% | 55,376 psi | 89% | 2566 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,563 psi | 86% | 2589 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,202 psi | 90% | 2625 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,548 psi | 86% | 2635 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,548 psi | 86% | 2635 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 55,796 psi | 89% | 2664 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,993 psi | 77% | 2628 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 82% | 54,824 psi | 88% | 2513 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,230 psi | 89% | 2536 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,056 psi | 87% | 2651 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 96% | 55,056 psi | 88% | 2648 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 82% | 55,608 psi | 89% | 2628 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,461 psi | 86% | 2608 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 53,330 psi | 86% | 2589 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,245 psi | 89% | 2710 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,577 psi | 86% | 2756 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,549 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,027 psi | 88% | 2569 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,288 psi | 89% | 2687 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,500 psi | 76% | 2635 fps | 98.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,955 psi | 88% | 2776 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,867 psi | 86% | 2513 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,940 psi | 86% | 2667 fps | 99.1% |
| Bofors RP3 | <<locked>> | 96% | 54,969 psi | 88% | 2684 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2648 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,637 psi | 89% | 2598 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,695 psi | 89% | 2684 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,128 psi | 87% | 2726 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 86% | 53,316 psi | 85% | 2598 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,636 psi | 88% | 2628 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,362 psi | 90% | 2694 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 53,127 psi | 85% | 2700 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 90% | 54,592 psi | 88% | 2661 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,627 psi | 70% | 2523 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 53,403 psi | 86% | 2690 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,853 psi | 56% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 54,708 psi | 88% | 2644 fps | 99.9% |
| IMR 3031 | <<locked>> | 94% | 55,608 psi | 89% | 2667 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 53,766 psi | 86% | 2621 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 96% | 53,577 psi | 86% | 2589 fps | 96.5% |
| IMR 4198 | <<locked>> | 84% | 55,317 psi | 89% | 2530 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,157 psi | 87% | 2628 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,727 psi | 65% | 2484 fps | 96.7% |
| IMR 4895 | <<locked>> | 92% | 53,287 psi | 85% | 2671 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 88% | 53,461 psi | 86% | 2608 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 53,519 psi | 86% | 2598 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,272 psi | 85% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,259 psi | 87% | 2585 fps | 99.7% |
| Lovex S062 | <<locked>> | 94% | 54,056 psi | 87% | 2628 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,214 psi | 85% | 2621 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2598 fps | 96.2% |
| Norma 201 | <<locked>> | 92% | 56,246 psi | 90% | 2648 fps | 100% |
| Norma 202 | <<locked>> | 90% | 53,243 psi | 85% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,433 psi | 87% | 2677 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 47,732 psi | 77% | 2621 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 94% | 54,911 psi | 88% | 2703 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2612 fps | 96.1% |
| Ramshot TAC | <<locked>> | 88% | 53,766 psi | 86% | 2621 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,040 psi | 85% | 2641 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,578 psi | 88% | 2612 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,215 psi | 56% | 1617 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,258 psi | 85% | 2595 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,330 psi | 86% | 2625 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,361 psi | 89% | 2749 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,853 psi | 88% | 2782 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,558 psi | 76% | 2644 fps | 97.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,660 psi | 78% | 2667 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 88% | 54,099 psi | 87% | 2589 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,243 psi | 85% | 2598 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,505 psi | 87% | 2671 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2648 fps | 96.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,214 psi | 85% | 2621 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,272 psi | 85% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,056 psi | 87% | 2628 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2598 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 52,823 psi | 85% | 2566 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,898 psi | 90% | 2638 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,405 psi | 90% | 2730 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,927 psi | 90% | 2585 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,637 psi | 89% | 2651 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,941 psi | 90% | 2674 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,969 psi | 88% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,563 psi | 87% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2575 fps | 96.5% |
| Somchem S321 | <<locked>> | 86% | 54,592 psi | 88% | 2644 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 53,998 psi | 87% | 2549 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,143 psi | 88% | 2644 fps | 99.7% |
| Somchem S355 | <<locked>> | 98% | 54,984 psi | 88% | 2667 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,699 psi | 68% | 2575 fps | 99.6% |
| Unknown powderᴾ | <<locked>> | 100% | 52,460 psi | 84% | 2680 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 86% | 54,868 psi | 88% | 2520 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,955 psi | 88% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,043 psi | 90% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 53,896 psi | 86% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,214 psi | 85% | 2608 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2621 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 88% | 53,969 psi | 87% | 2612 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,477 psi | 89% | 2631 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,284 psi | 79% | 2625 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,430 psi | 82% | 2608 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 53,983 psi | 87% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,127 psi | 85% | 2700 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,650 psi | 86% | 2654 fps | 99.8% |
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% | 43,323 psi | 69% | 2398 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,079 psi | 75% | 2497 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,694 psi | 57% | 2316 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,698 psi | 65% | 2438 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 40,698 psi | 65% | 2438 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 33,750 psi | 54% | 2303 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 36,434 psi | 58% | 2418 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 51,590 psi | 83% | 2470 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,996 psi | 83% | 2490 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,682 psi | 64% | 2408 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 35,897 psi | 58% | 2313 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 51,967 psi | 83% | 2579 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,727 psi | 67% | 2421 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 41,031 psi | 66% | 2418 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,385 psi | 78% | 2605 fps | 99.5% |
| Alliant Power Pro 2000-MR | 52.4 gr | 80% | 35,723 psi | 57% | 2411 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,982 psi | 53% | 2287 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,762 psi | 78% | 2484 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,578 psi | 57% | 2343 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 37,289 psi | 60% | 2428 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 32,445 psi | 52% | 2346 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,415 psi | 81% | 2467 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,450 psi | 62% | 2402 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 32,227 psi | 52% | 2283 fps | 96.5% |
| Bofors RP7 | <<locked>> | 98% | 52,141 psi | 84% | 2592 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,613 psi | 70% | 2415 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,871 psi | 64% | 2434 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,700 psi | 70% | 2559 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 44,048 psi | 71% | 2461 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,169 psi | 82% | 2579 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 38,130 psi | 61% | 2388 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 94% | 46,427 psi | 74% | 2592 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 39,987 psi | 64% | 2418 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,908 psi | 51% | 2280 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,881 psi | 54% | 2339 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 42% | 1411 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,679 psi | 57% | 2316 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 35,824 psi | 57% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,170 psi | 53% | 2247 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 92% | 47,718 psi | 77% | 2497 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 49,284 psi | 79% | 2448 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 48,080 psi | 77% | 2533 fps | 95.2% |
| IMR 4831 | <<locked>> | 96% | 35,853 psi | 57% | 2388 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 36,376 psi | 58% | 2372 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 80% | 41,727 psi | 67% | 2421 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 46,804 psi | 75% | 2500 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 38,159 psi | 61% | 2392 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 40,350 psi | 65% | 2356 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 35,259 psi | 57% | 2306 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 41,539 psi | 67% | 2428 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 47,369 psi | 76% | 2549 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 38,885 psi | 62% | 2365 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 38,986 psi | 63% | 2379 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 34,940 psi | 56% | 2333 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 37,144 psi | 60% | 2421 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 34,301 psi | 55% | 2339 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 98% | 44,121 psi | 71% | 2559 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 41,452 psi | 66% | 2415 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,770 psi | 65% | 2438 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,034 psi | 72% | 2464 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,194 psi | 42% | 1444 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,862 psi | 75% | 2503 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 44,063 psi | 71% | 2474 fps | 95% |
| ReloadSwiss RS 52 | 50.8 gr | 80% | 36,680 psi | 59% | 2428 fps | 96.2% |
| ReloadSwiss RS 60 | 51.6 gr | 80% | 30,342 psi | 49% | 2300 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 39,001 psi | 63% | 2487 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 42,598 psi | 68% | 2552 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 42,656 psi | 68% | 2411 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 36,970 psi | 59% | 2323 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 30,443 psi | 49% | 2234 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 98% | 52,141 psi | 84% | 2592 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,539 psi | 67% | 2428 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,159 psi | 61% | 2392 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 35,259 psi | 57% | 2306 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 47,369 psi | 76% | 2549 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,400 psi | 79% | 2516 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,388 psi | 84% | 2589 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,678 psi | 54% | 2329 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,487 psi | 79% | 2503 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,610 psi | 64% | 2392 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,203 psi | 61% | 2379 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,495 psi | 65% | 2333 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,344 psi | 53% | 2211 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 47,007 psi | 75% | 2480 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 44,657 psi | 72% | 2493 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 39,958 psi | 64% | 2336 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,160 psi | 63% | 2388 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 31,459 psi | 50% | 2244 fps | 95.5% |
| Somchem S365 | <<locked>> | 88% | 29,153 psi | 47% | 2270 fps | 95.8% |
| Unknown powder | <<locked>> | 92% | 40,640 psi | 65% | 2480 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 45,861 psi | 74% | 2398 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,654 psi | 65% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,998 psi | 58% | 2316 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,956 psi | 59% | 2323 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,907 psi | 48% | 2188 fps | 96.5% |
| Vihtavuori N160 | <<locked>> | 92% | 39,001 psi | 63% | 2425 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 41,553 psi | 67% | 2415 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 35,505 psi | 57% | 2310 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 38,087 psi | 61% | 2425 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,489 psi | 52% | 2257 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 43,801 psi | 70% | 2510 fps | 99.7% |
| Winchester 760 | <<locked>> | 94% | 46,427 psi | 74% | 2592 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,456 psi | 74% | 2546 fps | 99.3% |
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 103 powders for 8.5 x 55 Blaser loaded with the .338 | 215gr | Sierra GameKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,782 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,782 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 215.0 gr projectile in 0.338" calls for a 1:15.5 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 60, ReloadSwiss RS 52 rank at the top here: for 8.5 x 55 Blaser with the .338 | 215gr | Sierra GameKing 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.