Load Specifications
Bullet:.338 | 225gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:225 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:1:16.5
Load data in caliber .338 Blaser Mag. with .338 | 225gr | Swift A-Frame bullet and 100 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% | 52,982 psi | 87% | 2631 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,679 psi | 90% | 2690 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,050 psi | 77% | 2667 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 53,214 psi | 87% | 2680 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,243 psi | 87% | 2779 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 52,852 psi | 87% | 2710 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,940 psi | 89% | 2713 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,534 psi | 90% | 2812 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,042 psi | 90% | 2703 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 52,373 psi | 86% | 2825 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,186 psi | 89% | 2733 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,607 psi | 90% | 2756 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,143 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 51,706 psi | 85% | 2808 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,476 psi | 88% | 2802 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,036 psi | 77% | 2743 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,498 psi | 73% | 2694 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,001 psi | 64% | 2608 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,299 psi | 83% | 2867 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 52,446 psi | 86% | 2723 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,824 psi | 90% | 2749 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,036 psi | 77% | 2743 fps | 96.7% |
| Bofors RP7 | <<locked>> | 92% | 54,737 psi | 90% | 2733 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,607 psi | 90% | 2733 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 52,011 psi | 85% | 2713 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 52,185 psi | 86% | 2776 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 52,547 psi | 86% | 2736 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 53,417 psi | 88% | 2717 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,215 psi | 89% | 2756 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,026 psi | 87% | 2753 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 51,967 psi | 85% | 2805 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,013 psi | 59% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,476 psi | 89% | 2720 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,766 psi | 88% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,403 psi | 88% | 2697 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 52,837 psi | 87% | 2677 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 51,895 psi | 85% | 2710 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,026 psi | 87% | 2707 fps | 98.8% |
| IMR 4831 | <<locked>> | 96% | 53,650 psi | 88% | 2769 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 52,634 psi | 86% | 2733 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,201 psi | 89% | 2746 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 82% | 55,042 psi | 90% | 2703 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 52,852 psi | 87% | 2684 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,127 psi | 86% | 2638 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,359 psi | 88% | 2690 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 52,721 psi | 87% | 2703 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 53,824 psi | 88% | 2743 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,146 psi | 64% | 2526 fps | 97.1% |
| Norma 201 | <<locked>> | 84% | 54,911 psi | 90% | 2700 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,286 psi | 86% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,896 psi | 88% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 94% | 52,228 psi | 86% | 2756 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 49,734 psi | 82% | 2825 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 52,156 psi | 86% | 2766 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,288 psi | 89% | 2766 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,186 psi | 89% | 2815 fps | 99.6% |
| Ramshot TAC | <<locked>> | 82% | 54,969 psi | 90% | 2730 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,911 psi | 90% | 2743 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 60% | 1713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 52,141 psi | 86% | 2697 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 51,706 psi | 85% | 2769 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,027 psi | 90% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,910 psi | 87% | 2799 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 51,750 psi | 85% | 2825 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 52,257 psi | 86% | 2654 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,940 psi | 90% | 2743 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 52,765 psi | 87% | 2730 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,417 psi | 86% | 2782 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 92% | 54,737 psi | 90% | 2733 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 52,721 psi | 87% | 2703 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 52,852 psi | 87% | 2684 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,359 psi | 88% | 2690 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,824 psi | 88% | 2743 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 52,982 psi | 87% | 2753 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,737 psi | 88% | 2710 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,679 psi | 90% | 2733 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 52,750 psi | 87% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,272 psi | 87% | 2592 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 52,605 psi | 86% | 2657 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,924 psi | 85% | 2779 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 52,301 psi | 86% | 2589 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,403 psi | 88% | 2700 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 51,793 psi | 85% | 2694 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 54,563 psi | 90% | 2726 fps | 95.8% |
| Somchem S365 | <<locked>> | 98% | 54,172 psi | 89% | 2815 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,185 psi | 87% | 2762 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 82% | 53,200 psi | 87% | 2572 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 52,214 psi | 86% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 52,750 psi | 87% | 2635 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 52,953 psi | 87% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,462 psi | 89% | 2759 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,876 psi | 75% | 2631 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 86% | 54,201 psi | 89% | 2677 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,403 psi | 88% | 2762 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,414 psi | 81% | 2766 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,201 psi | 89% | 2733 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 52,185 psi | 86% | 2776 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,900 psi | 66% | 2733 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,476 psi | 89% | 2736 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,835 psi | 82% | 2703 fps | 96.9% |
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% | 46,499 psi | 76% | 2539 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,020 psi | 74% | 2533 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 33,475 psi | 55% | 2405 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,976 psi | 72% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,953 psi | 54% | 2405 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 49,690 psi | 82% | 2661 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,163 psi | 69% | 2520 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 44,976 psi | 74% | 2651 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,750 psi | 85% | 2657 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,643 psi | 75% | 2713 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,293 psi | 69% | 2543 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,252 psi | 74% | 2608 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,822 psi | 54% | 2415 fps | 97.1% |
| Alliant Reloder-17 | 63.5 gr | 80% | 36,651 psi | 60% | 2533 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,324 psi | 73% | 2644 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 41,394 psi | 68% | 2631 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,353 psi | 42% | 2231 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,460 psi | 53% | 2441 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,719 psi | 50% | 2444 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,124 psi | 81% | 2674 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 42,177 psi | 69% | 2549 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 41,394 psi | 68% | 2631 fps | 95% |
| Bofors RP7 | <<locked>> | 82% | 40,016 psi | 66% | 2474 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,053 psi | 84% | 2684 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,815 psi | 70% | 2559 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 37,420 psi | 61% | 2503 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 40,756 psi | 67% | 2526 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 50,198 psi | 82% | 2667 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,269 psi | 50% | 2316 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,485 psi | 76% | 2651 fps | 100% |
| Hodgdon Superformance | 70.5 gr | 84% | 39,175 psi | 64% | 2566 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 44% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,037 psi | 79% | 2621 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,314 psi | 83% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,338 psi | 73% | 2549 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,717 psi | 77% | 2575 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 40,509 psi | 67% | 2510 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,001 psi | 64% | 2454 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 31,923 psi | 52% | 2365 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 46,412 psi | 76% | 2635 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 50,952 psi | 84% | 2694 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 51,750 psi | 85% | 2657 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,385 psi | 81% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,008 psi | 80% | 2589 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,396 psi | 73% | 2549 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,506 psi | 60% | 2408 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 37,043 psi | 61% | 2438 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 34,389 psi | 56% | 2425 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,457 psi | 80% | 2605 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,081 psi | 81% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,628 psi | 73% | 2595 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 42,714 psi | 70% | 2589 fps | 95% |
| Norma MRP | <<locked>> | 92% | 37,985 psi | 62% | 2592 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 33,054 psi | 54% | 2402 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,411 psi | 73% | 2612 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 34,301 psi | 56% | 2441 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 51,590 psi | 85% | 2680 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,416 psi | 84% | 2694 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 45% | 1529 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,989 psi | 71% | 2539 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,196 psi | 79% | 2710 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,001 psi | 64% | 2589 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,619 psi | 54% | 2418 fps | 96.5% |
| ReloadSwiss RS 70 | 64.5 gr | 80% | 32,213 psi | 53% | 2418 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 46,282 psi | 76% | 2562 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,726 psi | 65% | 2500 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 49,501 psi | 81% | 2677 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 43,033 psi | 71% | 2621 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 40,016 psi | 66% | 2474 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,506 psi | 60% | 2408 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,385 psi | 81% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,396 psi | 73% | 2549 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,043 psi | 61% | 2438 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,654 psi | 67% | 2549 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,285 psi | 83% | 2657 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,950 psi | 79% | 2628 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,661 psi | 82% | 2546 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,727 psi | 69% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,145 psi | 63% | 2405 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,627 psi | 70% | 2618 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 49,211 psi | 81% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,009 psi | 82% | 2648 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,234 psi | 66% | 2500 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 51,082 psi | 84% | 2674 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 29,617 psi | 49% | 2359 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 38,479 psi | 63% | 2503 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 50,154 psi | 82% | 2533 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,238 psi | 76% | 2533 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,470 psi | 76% | 2543 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,377 psi | 63% | 2434 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,461 psi | 57% | 2405 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 40,335 psi | 66% | 2530 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 44,846 psi | 74% | 2539 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,968 psi | 56% | 2405 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 27,441 psi | 45% | 2306 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,910 psi | 56% | 2379 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 37,608 psi | 62% | 2507 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,338 psi | 42% | 2303 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,892 psi | 79% | 2638 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,424 psi | 71% | 2592 fps | 95.3% |
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 100 powders for .338 Blaser Mag. loaded with the .338 | 225gr | Swift A-Frame. Alliant Reloder-26 delivers the highest muzzle velocity at 2,867 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,867 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 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 225.0 gr projectile in 0.338" calls for a 1:16.5 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 | 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.