Load Specifications
Bullet:.338 | 250gr | Target Virtus
Bullet Manufacturer:Virtus
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Blaser Mag. load data
Case Length (l3):2.5078"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:92.6 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:60,916 psi
Recommended Twist Rate:1:11.0
Load data in caliber .338 Blaser Mag. with .338 | 250gr | Target Virtus bullet and 107 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 54,346 psi | 89% | 2434 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 52,823 psi | 87% | 2461 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,098 psi | 87% | 2513 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,127 psi | 87% | 2487 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,497 psi | 71% | 2451 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 52,997 psi | 87% | 2510 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,084 psi | 87% | 2605 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 53,447 psi | 88% | 2543 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 54,665 psi | 90% | 2546 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,459 psi | 84% | 2592 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 52,562 psi | 86% | 2493 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,708 psi | 88% | 2461 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,098 psi | 87% | 2657 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,795 psi | 90% | 2566 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 51,895 psi | 85% | 2543 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,418 psi | 89% | 2654 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 51,924 psi | 85% | 2635 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,488 psi | 83% | 2582 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 43,976 psi | 72% | 2523 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,350 psi | 68% | 2477 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,361 psi | 60% | 2395 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,470 psi | 76% | 2638 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,214 psi | 87% | 2562 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 51,808 psi | 85% | 2536 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 43,976 psi | 72% | 2523 fps | 96.3% |
| Bofors RP7 | <<locked>> | 92% | 51,982 psi | 85% | 2516 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,012 psi | 89% | 2474 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 51,764 psi | 85% | 2523 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 52,576 psi | 86% | 2549 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 53,969 psi | 89% | 2628 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 96% | 54,679 psi | 90% | 2592 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 84% | 54,041 psi | 89% | 2549 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,375 psi | 89% | 2582 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,809 psi | 88% | 2585 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 52,489 psi | 86% | 2641 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 59% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,331 psi | 89% | 2539 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 52,982 psi | 87% | 2507 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,417 psi | 88% | 2520 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,779 psi | 87% | 2503 fps | 99% |
| IMR 4350 | <<locked>> | 96% | 52,185 psi | 86% | 2543 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,911 psi | 89% | 2546 fps | 99.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,879 psi | 84% | 2559 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 53,243 psi | 87% | 2569 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 51,300 psi | 84% | 2530 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 52,562 psi | 86% | 2493 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,098 psi | 87% | 2513 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,040 psi | 87% | 2477 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,896 psi | 88% | 2523 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,229 psi | 87% | 2539 fps | 99.7% |
| Lovex S070 | <<locked>> | 96% | 54,056 psi | 89% | 2572 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,926 psi | 59% | 2316 fps | 96.7% |
| Norma 201 | <<locked>> | 84% | 52,199 psi | 86% | 2490 fps | 100% |
| Norma 202 | <<locked>> | 84% | 52,837 psi | 87% | 2487 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,389 psi | 89% | 2572 fps | 100% |
| Norma 204 | <<locked>> | 96% | 52,692 psi | 87% | 2592 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 46,369 psi | 76% | 2598 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 52,344 psi | 86% | 2595 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 51,372 psi | 84% | 2549 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,763 psi | 82% | 2612 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 98% | 54,592 psi | 90% | 2644 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,801 psi | 70% | 2477 fps | 96.4% |
| Ramshot TAC | <<locked>> | 82% | 52,489 psi | 86% | 2520 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,373 psi | 86% | 2533 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 59% | 1572 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 52,866 psi | 87% | 2536 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,373 psi | 86% | 2602 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 51,706 psi | 85% | 2631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 52,924 psi | 87% | 2628 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,185 psi | 86% | 2657 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 52,982 psi | 87% | 2464 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 52,736 psi | 87% | 2487 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,056 psi | 90% | 2569 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 53,200 psi | 87% | 2566 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,255 psi | 81% | 2566 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 51,982 psi | 85% | 2516 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,229 psi | 87% | 2539 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,098 psi | 87% | 2513 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,896 psi | 88% | 2523 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,056 psi | 89% | 2572 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,374 psi | 88% | 2585 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,418 psi | 89% | 2546 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,011 psi | 85% | 2520 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,534 psi | 88% | 2425 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,114 psi | 89% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,214 psi | 87% | 2497 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,776 psi | 80% | 2562 fps | 97.4% |
| Somchem S335 | <<locked>> | 84% | 53,084 psi | 87% | 2428 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,172 psi | 89% | 2533 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 51,953 psi | 85% | 2523 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,954 psi | 89% | 2638 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,777 psi | 82% | 2546 fps | 98.3% |
| Unknown powder | <<locked>> | 94% | 53,200 psi | 87% | 2598 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 84% | 53,954 psi | 89% | 2411 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 52,678 psi | 86% | 2451 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,301 psi | 88% | 2467 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,316 psi | 88% | 2503 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,781 psi | 90% | 2589 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 42,960 psi | 71% | 2425 fps | 96.4% |
| Vihtavuori N530 | <<locked>> | 82% | 52,866 psi | 87% | 2493 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,868 psi | 90% | 2513 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,664 psi | 88% | 2595 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,934 psi | 75% | 2546 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,708 psi | 90% | 2566 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,969 psi | 89% | 2628 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,014 psi | 61% | 2510 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,025 psi | 85% | 2566 fps | 97.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 51,024 psi | 84% | 2395 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,424 psi | 71% | 2336 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,603 psi | 81% | 2470 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 38,261 psi | 63% | 2247 fps | 95.2% |
| Accurate 3100 | <<locked>> | 92% | 32,895 psi | 54% | 2254 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 41,118 psi | 68% | 2339 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,211 psi | 50% | 2201 fps | 96.6% |
| ADI AR 2206H | <<locked>> | 80% | 47,065 psi | 77% | 2448 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 39,972 psi | 66% | 2320 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 42,409 psi | 70% | 2438 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,211 psi | 81% | 2448 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,270 psi | 83% | 2421 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,062 psi | 71% | 2500 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,740 psi | 65% | 2339 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,670 psi | 70% | 2398 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,806 psi | 51% | 2218 fps | 96.9% |
| Alliant Reloder-17 | 56.5 gr | 80% | 34,447 psi | 57% | 2333 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 41,553 psi | 68% | 2431 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 41,307 psi | 68% | 2474 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,048 psi | 41% | 2093 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 96% | 32,053 psi | 53% | 2290 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 30,429 psi | 50% | 2300 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,485 psi | 76% | 2461 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 39,436 psi | 65% | 2346 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 41,307 psi | 68% | 2474 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 37,913 psi | 62% | 2280 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,879 psi | 84% | 2431 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,254 psi | 79% | 2474 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,248 psi | 66% | 2352 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 80% | 35,520 psi | 58% | 2313 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 40,001 psi | 66% | 2352 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 47,529 psi | 78% | 2457 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,268 psi | 46% | 2129 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,220 psi | 68% | 2398 fps | 100% |
| Hodgdon Superformance | 62.7 gr | 84% | 36,796 psi | 60% | 2362 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,513 psi | 44% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,395 psi | 70% | 2362 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 43,700 psi | 72% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,204 psi | 64% | 2297 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 38,899 psi | 64% | 2270 fps | 96.3% |
| IMR 4350 | <<locked>> | 86% | 38,072 psi | 63% | 2306 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,101 psi | 61% | 2260 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 26,731 psi | 44% | 2096 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 43,729 psi | 72% | 2425 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 48,254 psi | 79% | 2484 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 49,211 psi | 81% | 2448 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,543 psi | 76% | 2428 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,007 psi | 77% | 2388 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 42,047 psi | 69% | 2349 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 34,447 psi | 57% | 2215 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 34,780 psi | 57% | 2244 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 31,575 psi | 52% | 2224 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 46,093 psi | 76% | 2402 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,441 psi | 76% | 2402 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,032 psi | 69% | 2388 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 42,946 psi | 71% | 2434 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 35,331 psi | 58% | 2382 fps | 95% |
| Norma URP | <<locked>> | 80% | 30,748 psi | 50% | 2205 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 41,785 psi | 69% | 2405 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 46,311 psi | 76% | 2552 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 82% | 32,169 psi | 53% | 2244 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 39,610 psi | 65% | 2418 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 49,023 psi | 80% | 2467 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,805 psi | 80% | 2484 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,977 psi | 44% | 1404 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,654 psi | 67% | 2339 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,513 psi | 75% | 2500 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,709 psi | 60% | 2385 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,139 psi | 49% | 2221 fps | 96.1% |
| ReloadSwiss RS 70 | 57.3 gr | 80% | 30,110 psi | 49% | 2221 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 49,835 psi | 82% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,772 psi | 72% | 2359 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,057 psi | 61% | 2297 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 46,905 psi | 77% | 2470 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 40,350 psi | 66% | 2415 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 37,913 psi | 62% | 2280 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,447 psi | 57% | 2215 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,543 psi | 76% | 2428 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,047 psi | 69% | 2349 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 34,780 psi | 57% | 2244 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,319 psi | 63% | 2349 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,384 psi | 78% | 2444 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,658 psi | 75% | 2425 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,384 psi | 78% | 2346 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,566 psi | 65% | 2231 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 35,868 psi | 59% | 2211 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 39,987 psi | 66% | 2408 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 47,021 psi | 77% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,297 psi | 78% | 2441 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 37,971 psi | 62% | 2303 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 27,470 psi | 45% | 2165 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 38,276 psi | 63% | 2352 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 33,475 psi | 55% | 2257 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 80% | 47,863 psi | 79% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,613 psi | 72% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,005 psi | 72% | 2343 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,013 psi | 59% | 2241 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,140 psi | 53% | 2208 fps | 97% |
| Vihtavuori N165 | <<locked>> | 98% | 40,089 psi | 66% | 2372 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 49,429 psi | 81% | 2448 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,424 psi | 70% | 2339 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,633 psi | 52% | 2211 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 26,789 psi | 44% | 2159 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,778 psi | 52% | 2188 fps | 98.8% |
| Winchester 760 | <<locked>> | 80% | 35,520 psi | 58% | 2313 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 24,889 psi | 41% | 2162 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 94% | 42,047 psi | 69% | 2408 fps | 95.4% |
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 107 powders for .338 Blaser Mag. loaded with the .338 | 250gr | Target Virtus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,657 fps; across all powders the maximum-charge window runs from 1,535 fps to 2,657 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .338 Blaser Mag. with the .338 | 250gr | Target Virtus 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.