Load Specifications
Load data in caliber .338 Blaser Mag. with .338 | 250gr | Prvi Partizan FMJ-BT bullet and 103 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.
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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 2495 | <<locked>> | 84% | 53,925 psi | 89% | 2480 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,098 psi | 87% | 2507 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,993 psi | 79% | 2533 fps | 99.4% |
| Accurate 4064 | <<locked>> | 86% | 54,201 psi | 89% | 2530 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,230 psi | 89% | 2631 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 53,664 psi | 88% | 2559 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,665 psi | 90% | 2562 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 51,866 psi | 85% | 2618 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 49,617 psi | 81% | 2608 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,505 psi | 88% | 2677 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 51,822 psi | 85% | 2539 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 52,156 psi | 86% | 2559 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,998 psi | 90% | 2680 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 52,707 psi | 87% | 2657 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,317 psi | 89% | 2657 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,979 psi | 79% | 2608 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,281 psi | 74% | 2556 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,610 psi | 65% | 2480 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,198 psi | 84% | 2726 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,330 psi | 88% | 2575 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 44,164 psi | 73% | 2543 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 52,402 psi | 86% | 2552 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,979 psi | 79% | 2608 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 52,243 psi | 86% | 2539 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 52,866 psi | 87% | 2569 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,360 psi | 89% | 2648 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 94% | 54,940 psi | 90% | 2615 fps | 98.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 52,069 psi | 85% | 2595 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 82% | 54,259 psi | 89% | 2566 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,042 psi | 90% | 2605 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,128 psi | 89% | 2602 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,866 psi | 87% | 2664 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 59% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,244 psi | 89% | 2552 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,403 psi | 88% | 2523 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,650 psi | 88% | 2539 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,765 psi | 87% | 2520 fps | 99.2% |
| IMR 4350 | <<locked>> | 94% | 52,634 psi | 86% | 2566 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,925 psi | 89% | 2566 fps | 99.3% |
| IMR 4831 | <<locked>> | 98% | 52,083 psi | 86% | 2589 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 53,519 psi | 88% | 2582 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,940 psi | 90% | 2602 fps | 97% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2641 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 82% | 53,838 psi | 88% | 2533 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,823 psi | 87% | 2487 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,389 psi | 89% | 2539 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,505 psi | 88% | 2559 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 54,795 psi | 90% | 2598 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,030 psi | 66% | 2402 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 52,431 psi | 86% | 2503 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,982 psi | 87% | 2500 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,752 psi | 90% | 2592 fps | 100% |
| Norma 204 | <<locked>> | 94% | 52,939 psi | 87% | 2612 fps | 98.1% |
| Norma MRPᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2684 fps | 99.2% |
| Norma URP | <<locked>> | 94% | 53,200 psi | 87% | 2618 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 51,837 psi | 85% | 2572 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,099 psi | 89% | 2703 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 94% | 51,663 psi | 85% | 2618 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,717 psi | 77% | 2566 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 60% | 1598 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,127 psi | 87% | 2556 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 52,794 psi | 87% | 2618 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 52,301 psi | 86% | 2651 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,969 psi | 89% | 2654 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 52,605 psi | 86% | 2680 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 38,392 psi | 63% | 2490 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 84% | 53,200 psi | 87% | 2507 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 52,547 psi | 86% | 2549 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,679 psi | 88% | 2592 fps | 97.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,505 psi | 88% | 2644 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 90% | 52,243 psi | 86% | 2539 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,505 psi | 88% | 2559 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 53,838 psi | 88% | 2533 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,389 psi | 89% | 2539 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,795 psi | 90% | 2598 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,969 psi | 89% | 2605 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,621 psi | 90% | 2562 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 52,098 psi | 86% | 2536 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,490 psi | 88% | 2438 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,230 psi | 89% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,447 psi | 88% | 2516 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,011 psi | 87% | 2641 fps | 98.5% |
| Somchem S335 | <<locked>> | 82% | 53,084 psi | 87% | 2441 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,273 psi | 89% | 2549 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 52,678 psi | 86% | 2546 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 51,866 psi | 85% | 2536 fps | 96.1% |
| Somchem S365 | <<locked>> | 96% | 51,590 psi | 85% | 2615 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,172 psi | 89% | 2625 fps | 99.1% |
| Unknown powder | <<locked>> | 92% | 53,983 psi | 89% | 2625 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 53,911 psi | 89% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,272 psi | 87% | 2467 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,693 psi | 88% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,911 psi | 89% | 2523 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 52,011 psi | 85% | 2566 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,644 psi | 77% | 2500 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 86% | 54,969 psi | 90% | 2526 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,331 psi | 89% | 2618 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,444 psi | 83% | 2621 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 51,329 psi | 84% | 2674 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,926 psi | 90% | 2582 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,360 psi | 89% | 2648 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,596 psi | 67% | 2598 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,663 psi | 86% | 2595 fps | 98.1% |
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 2495 | <<locked>> | 80% | 47,384 psi | 78% | 2395 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,031 psi | 67% | 2313 fps | 96.5% |
| Accurate 3100 | <<locked>> | 88% | 31,995 psi | 53% | 2241 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 44,889 psi | 74% | 2405 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,692 psi | 55% | 2287 fps | 98% |
| ADI AR 2206H | <<locked>> | 80% | 50,488 psi | 83% | 2513 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,844 psi | 70% | 2382 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 40,248 psi | 66% | 2415 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 46,557 psi | 76% | 2556 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,615 psi | 77% | 2572 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,120 psi | 71% | 2408 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,035 psi | 76% | 2467 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,417 psi | 55% | 2293 fps | 98.1% |
| Alliant Reloder-17 | 59.3 gr | 80% | 37,333 psi | 61% | 2405 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 39,668 psi | 65% | 2408 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 39,465 psi | 65% | 2451 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,323 psi | 40% | 2077 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 31,024 psi | 51% | 2277 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 84% | 29,312 psi | 48% | 2280 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,937 psi | 82% | 2530 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 38,943 psi | 64% | 2441 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 43,047 psi | 71% | 2415 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 39,465 psi | 65% | 2451 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 38,261 psi | 63% | 2300 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 43,569 psi | 72% | 2421 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,696 psi | 64% | 2388 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 82% | 37,985 psi | 62% | 2326 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 98% | 48,820 psi | 80% | 2546 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 50,995 psi | 84% | 2520 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,864 psi | 51% | 2201 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,585 psi | 73% | 2464 fps | 100% |
| Hodgdon Superformance | 64.3 gr | 82% | 37,246 psi | 61% | 2388 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 44% | 1394 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,165 psi | 74% | 2421 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,195 psi | 77% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,061 psi | 69% | 2359 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,626 psi | 68% | 2336 fps | 97.4% |
| IMR 4350 | <<locked>> | 82% | 36,347 psi | 60% | 2283 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,726 psi | 65% | 2329 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 29,646 psi | 49% | 2175 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 47,210 psi | 78% | 2490 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 48,573 psi | 80% | 2507 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 98% | 47,500 psi | 78% | 2589 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 80% | 50,328 psi | 83% | 2487 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,676 psi | 82% | 2444 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,136 psi | 74% | 2408 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,159 psi | 61% | 2283 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 35,505 psi | 58% | 2267 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 30,951 psi | 51% | 2215 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 49,284 psi | 81% | 2461 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,995 psi | 82% | 2461 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,440 psi | 75% | 2454 fps | 100% |
| Norma 204 | <<locked>> | 86% | 40,669 psi | 67% | 2408 fps | 95.3% |
| Norma MRP | <<locked>> | 90% | 36,201 psi | 59% | 2415 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 33,837 psi | 56% | 2283 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 45,353 psi | 74% | 2474 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,410 psi | 71% | 2523 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 32,735 psi | 54% | 2267 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 94% | 37,478 psi | 62% | 2395 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,383 psi | 45% | 1424 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,816 psi | 72% | 2408 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,211 psi | 81% | 2566 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,711 psi | 65% | 2454 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,301 psi | 55% | 2300 fps | 97.6% |
| ReloadSwiss RS 70 | 60.3 gr | 80% | 32,880 psi | 54% | 2303 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 35,911 psi | 59% | 2431 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 46,963 psi | 77% | 2418 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,625 psi | 67% | 2369 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 44,382 psi | 73% | 2444 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 38,609 psi | 63% | 2395 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 38,261 psi | 63% | 2300 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,159 psi | 61% | 2283 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,328 psi | 83% | 2487 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,136 psi | 74% | 2408 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,505 psi | 58% | 2267 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,423 psi | 68% | 2415 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,082 psi | 84% | 2513 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,791 psi | 80% | 2487 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,386 psi | 83% | 2398 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,351 psi | 70% | 2287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,434 psi | 60% | 2234 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 38,276 psi | 63% | 2388 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 49,966 psi | 82% | 2398 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,821 psi | 83% | 2503 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,973 psi | 67% | 2365 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 48,559 psi | 80% | 2487 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 30,371 psi | 50% | 2244 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 36,709 psi | 60% | 2329 fps | 95.5% |
| Unknown powder | <<locked>> | 80% | 36,550 psi | 60% | 2333 fps | 98% |
| Vihtavuori N133 | <<locked>> | 80% | 50,865 psi | 84% | 2385 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,036 psi | 77% | 2385 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,384 psi | 78% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,204 psi | 64% | 2306 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,172 psi | 58% | 2280 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 38,537 psi | 63% | 2356 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 45,571 psi | 75% | 2398 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,592 psi | 57% | 2283 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 26,324 psi | 43% | 2146 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 98% | 47,964 psi | 79% | 2618 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,490 psi | 57% | 2257 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,696 psi | 64% | 2388 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 22,843 psi | 38% | 2096 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,682 psi | 65% | 2382 fps | 95.1% |
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 111 powders for .338 Blaser Mag. loaded with the .338 | 250gr | Prvi Partizan FMJ-BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,726 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 | Prvi Partizan FMJ-BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.