Load Specifications
Bullet:.338 | 225gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:225 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:1:16.5
Load data in caliber 8.5 x 55 Blaser with .338 | 225gr | Swift A-Frame bullet and 104 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% | 53,737 psi | 86% | 2484 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,434 psi | 89% | 2549 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,824 psi | 88% | 2543 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,737 psi | 86% | 2566 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,955 psi | 88% | 2539 fps | 96.4% |
| Accurate 4064 | <<locked>> | 94% | 54,868 psi | 88% | 2589 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,299 psi | 81% | 2605 fps | 99% |
| Accurate LT-30 | <<locked>> | 82% | 56,304 psi | 90% | 2470 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,869 psi | 90% | 2618 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 53,577 psi | 86% | 2569 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,187 psi | 88% | 2575 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,709 psi | 89% | 2552 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,388 psi | 86% | 2621 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,593 psi | 89% | 2726 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,200 psi | 85% | 2592 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,563 psi | 86% | 2487 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,896 psi | 86% | 2608 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,255 psi | 79% | 2608 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,447 psi | 86% | 2697 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,969 psi | 56% | 2362 fps | 97% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,492 psi | 89% | 2470 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,912 psi | 90% | 2638 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 53,374 psi | 86% | 2602 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,954 psi | 87% | 2569 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,983 psi | 87% | 2516 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,085 psi | 87% | 2602 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,318 psi | 90% | 2697 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,985 psi | 90% | 2569 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,476 psi | 86% | 2549 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,940 psi | 88% | 2615 fps | 99.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,592 psi | 86% | 2654 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 98% | 54,868 psi | 88% | 2618 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 53,098 psi | 85% | 2582 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,397 psi | 73% | 2500 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,521 psi | 89% | 2657 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,955 psi | 88% | 2690 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 56% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,534 psi | 87% | 2585 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,231 psi | 90% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,084 psi | 85% | 2552 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,563 psi | 86% | 2533 fps | 97% |
| IMR 4198 | <<locked>> | 82% | 53,708 psi | 86% | 2448 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,734 psi | 81% | 2543 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,028 psi | 90% | 2598 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,834 psi | 77% | 2549 fps | 98.7% |
| IMR 4895 | <<locked>> | 92% | 55,303 psi | 89% | 2638 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 55,187 psi | 88% | 2575 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,405 psi | 89% | 2562 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,361 psi | 89% | 2595 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,854 psi | 90% | 2549 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 55,941 psi | 90% | 2595 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,129 psi | 88% | 2595 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2572 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 54,665 psi | 88% | 2566 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,085 psi | 88% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,420 psi | 90% | 2644 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,748 psi | 80% | 2595 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 92% | 53,403 psi | 86% | 2621 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,950 psi | 78% | 2589 fps | 97.2% |
| Ramshot TAC | <<locked>> | 88% | 55,506 psi | 89% | 2592 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,911 psi | 88% | 2608 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 52,837 psi | 85% | 2530 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,520 psi | 57% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,955 psi | 88% | 2559 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,230 psi | 89% | 2595 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,070 psi | 87% | 2671 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,301 psi | 85% | 2700 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,748 psi | 80% | 2625 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,517 psi | 81% | 2648 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 88% | 55,869 psi | 90% | 2549 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,347 psi | 89% | 2566 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,243 psi | 85% | 2592 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,954 psi | 87% | 2569 fps | 96.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,129 psi | 88% | 2595 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,361 psi | 89% | 2595 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,941 psi | 90% | 2595 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2572 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,505 psi | 87% | 2530 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,129 psi | 88% | 2651 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,418 psi | 87% | 2507 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,954 psi | 87% | 2572 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,505 psi | 87% | 2595 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,461 psi | 86% | 2474 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,376 psi | 90% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,564 psi | 89% | 2549 fps | 97.3% |
| Somchem S321 | <<locked>> | 84% | 52,910 psi | 85% | 2559 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,680 psi | 89% | 2510 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,258 psi | 85% | 2562 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 53,896 psi | 86% | 2592 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,556 psi | 71% | 2552 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 53,447 psi | 86% | 2441 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,548 psi | 86% | 2461 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,549 psi | 87% | 2533 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,811 psi | 89% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,230 psi | 89% | 2575 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,504 psi | 84% | 2595 fps | 99% |
| Vihtavuori N530 | <<locked>> | 88% | 55,767 psi | 89% | 2575 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,809 psi | 86% | 2549 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,358 psi | 82% | 2598 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,318 psi | 60% | 2431 fps | 97% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,345 psi | 86% | 2582 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 55,158 psi | 88% | 2618 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2654 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,201 psi | 87% | 2602 fps | 100% |
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% | 44,773 psi | 72% | 2362 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,762 psi | 78% | 2461 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,173 psi | 60% | 2287 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,830 psi | 70% | 2425 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,428 psi | 78% | 2444 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 35,172 psi | 56% | 2280 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 35,520 psi | 57% | 2349 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 52,924 psi | 85% | 2428 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,046 psi | 66% | 2379 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 35,027 psi | 56% | 2244 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,076 psi | 69% | 2392 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 42,714 psi | 68% | 2382 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,096 psi | 80% | 2572 fps | 99.8% |
| Alliant Power Pro 2000-MR | 52.3 gr | 80% | 36,985 psi | 59% | 2395 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,287 psi | 55% | 2264 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,285 psi | 81% | 2444 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,869 psi | 59% | 2320 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,361 psi | 58% | 2362 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,531 psi | 51% | 2274 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,053 psi | 50% | 2264 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,851 psi | 83% | 2428 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,856 psi | 64% | 2379 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 33,576 psi | 54% | 2260 fps | 97.5% |
| Bofors RP7 | <<locked>> | 94% | 47,732 psi | 77% | 2474 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,121 psi | 72% | 2385 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,379 psi | 66% | 2408 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,411 psi | 73% | 2530 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 49,342 psi | 79% | 2480 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,053 psi | 80% | 2503 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,941 psi | 59% | 2313 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 94% | 44,034 psi | 71% | 2497 fps | 95% |
| Hodgdon H4350 | <<locked>> | 96% | 51,590 psi | 83% | 2569 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 41,350 psi | 66% | 2392 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,299 psi | 50% | 2218 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,202 psi | 60% | 2362 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 96% | 47,500 psi | 76% | 2569 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,005 psi | 42% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,885 psi | 64% | 2349 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 40,756 psi | 65% | 2392 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,753 psi | 59% | 2277 fps | 96.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 44,512 psi | 71% | 2388 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 50,647 psi | 81% | 2408 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 47,500 psi | 76% | 2493 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,775 psi | 75% | 2457 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 34,606 psi | 55% | 2310 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,710 psi | 60% | 2346 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 43,076 psi | 69% | 2392 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 48,457 psi | 78% | 2467 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,726 psi | 64% | 2362 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 41,582 psi | 67% | 2326 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 36,521 psi | 59% | 2280 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 40,524 psi | 65% | 2359 fps | 95.5% |
| Lovex S070 | <<locked>> | 94% | 43,511 psi | 70% | 2431 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,190 psi | 64% | 2339 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 40,393 psi | 65% | 2349 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,230 psi | 58% | 2310 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 36,100 psi | 58% | 2349 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 35,607 psi | 57% | 2316 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 96% | 43,105 psi | 69% | 2490 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 43,033 psi | 69% | 2392 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,250 psi | 68% | 2411 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,456 psi | 74% | 2434 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 42% | 1414 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,356 psi | 78% | 2467 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,743 psi | 69% | 2398 fps | 95.3% |
| ReloadSwiss RS 52 | 50.7 gr | 80% | 38,203 psi | 61% | 2405 fps | 97.2% |
| ReloadSwiss RS 60 | 51.5 gr | 80% | 31,415 psi | 50% | 2283 fps | 98.3% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,563 psi | 57% | 2365 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,754 psi | 62% | 2428 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 44,251 psi | 71% | 2382 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,261 psi | 61% | 2293 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 31,734 psi | 51% | 2215 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 94% | 47,732 psi | 77% | 2474 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,524 psi | 65% | 2359 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,726 psi | 64% | 2362 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,521 psi | 59% | 2280 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 43,511 psi | 70% | 2431 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,966 psi | 82% | 2484 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,677 psi | 52% | 2254 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,053 psi | 82% | 2464 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,046 psi | 66% | 2365 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,537 psi | 63% | 2352 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,698 psi | 67% | 2300 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,476 psi | 55% | 2182 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,571 psi | 73% | 2405 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 46,195 psi | 74% | 2461 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 41,249 psi | 66% | 2303 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,654 psi | 65% | 2362 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 32,648 psi | 52% | 2221 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 26,803 psi | 43% | 2156 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 47,195 psi | 76% | 2359 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,930 psi | 67% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,420 psi | 60% | 2283 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,261 psi | 61% | 2293 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,067 psi | 50% | 2169 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 88% | 35,592 psi | 57% | 2306 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 42,946 psi | 69% | 2385 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 36,767 psi | 59% | 2283 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 37,289 psi | 60% | 2356 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 32,924 psi | 53% | 2333 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,602 psi | 47% | 2142 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 42,250 psi | 68% | 2425 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 44,280 psi | 71% | 2503 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,841 psi | 62% | 2356 fps | 98.4% |
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 104 powders for 8.5 x 55 Blaser loaded with the .338 | 225gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,726 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 225.0 gr projectile in 0.338" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 55 Blaser with the .338 | 225gr | Swift A-Frame 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.