Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:215 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:1:15.5
Load data in caliber .338 Blaser Mag. with .338 | 215gr | Sierra GameKing bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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 2495 | <<locked>> | 86% | 54,534 psi | 90% | 2713 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,186 psi | 89% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,201 psi | 89% | 2730 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,976 psi | 74% | 2687 fps | 98% |
| Accurate 4064 | <<locked>> | 88% | 54,708 psi | 90% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,621 psi | 90% | 2858 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 54,534 psi | 90% | 2795 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,127 psi | 86% | 2746 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,620 psi | 86% | 2838 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,461 psi | 88% | 2746 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,505 psi | 89% | 2713 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,099 psi | 89% | 2913 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,315 psi | 86% | 2835 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,417 psi | 86% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,866 psi | 87% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,214 psi | 86% | 2864 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,243 psi | 87% | 2894 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,532 psi | 85% | 2825 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,714 psi | 70% | 2720 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,521 psi | 62% | 2621 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,022 psi | 79% | 2890 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,201 psi | 89% | 2812 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 52,895 psi | 87% | 2782 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,040 psi | 87% | 2762 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,824 psi | 90% | 2723 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,750 psi | 87% | 2772 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,780 psi | 88% | 2802 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 51,532 psi | 85% | 2825 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 94% | 52,257 psi | 86% | 2789 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 55,085 psi | 90% | 2805 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,069 psi | 85% | 2789 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,940 psi | 90% | 2841 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,795 psi | 88% | 2890 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 59% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,056 psi | 90% | 2789 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 53,838 psi | 88% | 2759 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,244 psi | 89% | 2769 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,534 psi | 88% | 2743 fps | 98.5% |
| IMR 4350 | <<locked>> | 96% | 53,359 psi | 88% | 2789 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,650 psi | 90% | 2789 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,214 psi | 86% | 2808 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 54,230 psi | 89% | 2818 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,461 psi | 88% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,404 psi | 89% | 2769 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,708 psi | 88% | 2720 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,984 psi | 90% | 2776 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,259 psi | 89% | 2785 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 52,011 psi | 85% | 2772 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,405 psi | 61% | 2543 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 53,287 psi | 87% | 2740 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,751 psi | 88% | 2736 fps | 100% |
| Norma 203B | <<locked>> | 86% | 52,127 psi | 86% | 2779 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,664 psi | 88% | 2835 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 47,674 psi | 78% | 2844 fps | 97.7% |
| Norma URP | <<locked>> | 96% | 53,519 psi | 88% | 2844 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 52,373 psi | 86% | 2802 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 52,098 psi | 86% | 2841 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 53,359 psi | 88% | 2762 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,185 psi | 87% | 2779 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 60% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,896 psi | 88% | 2782 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,403 psi | 88% | 2858 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,895 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,331 psi | 89% | 2884 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,330 psi | 88% | 2907 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 54,375 psi | 89% | 2720 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,925 psi | 89% | 2740 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,968 psi | 87% | 2779 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,302 psi | 89% | 2808 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,314 psi | 83% | 2808 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 53,040 psi | 87% | 2762 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,259 psi | 89% | 2785 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,404 psi | 89% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,984 psi | 90% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 52,011 psi | 85% | 2772 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,389 psi | 89% | 2838 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,011 psi | 85% | 2743 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,997 psi | 87% | 2769 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,491 psi | 89% | 2674 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,868 psi | 90% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,288 psi | 89% | 2736 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,821 psi | 82% | 2802 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 54,041 psi | 89% | 2674 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 51,692 psi | 85% | 2733 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,098 psi | 87% | 2776 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 51,793 psi | 85% | 2848 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,111 psi | 84% | 2789 fps | 97.7% |
| Unknown powder | <<locked>> | 94% | 54,520 psi | 90% | 2854 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 84% | 54,868 psi | 90% | 2657 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,635 psi | 88% | 2700 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,389 psi | 89% | 2717 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,534 psi | 90% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,460 psi | 86% | 2789 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 53,679 psi | 88% | 2740 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,518 psi | 86% | 2717 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,027 psi | 90% | 2848 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,210 psi | 78% | 2789 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,286 psi | 86% | 2766 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 51,532 psi | 85% | 2825 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,276 psi | 63% | 2746 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,359 psi | 88% | 2808 fps | 97.1% |
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% | 44,860 psi | 74% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,633 psi | 83% | 2713 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 41,872 psi | 69% | 2520 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 36,738 psi | 60% | 2530 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 42,438 psi | 70% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,415 psi | 52% | 2418 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 47,935 psi | 79% | 2690 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 40,901 psi | 67% | 2549 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 46,267 psi | 76% | 2726 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,038 psi | 82% | 2694 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,184 psi | 84% | 2667 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,034 psi | 72% | 2740 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,122 psi | 76% | 2726 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,857 psi | 67% | 2575 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,598 psi | 72% | 2635 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,705 psi | 52% | 2434 fps | 96% |
| Alliant Reloder-17 | 63.6 gr | 80% | 35,302 psi | 58% | 2556 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,513 psi | 75% | 2720 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,659 psi | 45% | 2349 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,302 psi | 58% | 2562 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,473 psi | 52% | 2513 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,500 psi | 78% | 2703 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 40,625 psi | 67% | 2579 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 41,307 psi | 68% | 2552 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,605 psi | 85% | 2674 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,371 psi | 81% | 2720 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,379 psi | 68% | 2585 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 82% | 39,073 psi | 64% | 2592 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 88% | 43,540 psi | 71% | 2635 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 48,457 psi | 80% | 2700 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,167 psi | 48% | 2336 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,221 psi | 69% | 2635 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 40,538 psi | 67% | 2648 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 44% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,192 psi | 71% | 2595 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 44,628 psi | 73% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,161 psi | 66% | 2526 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 39,784 psi | 65% | 2493 fps | 95.5% |
| IMR 4350 | <<locked>> | 88% | 41,466 psi | 68% | 2582 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,263 psi | 66% | 2533 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 29,588 psi | 49% | 2356 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 44,701 psi | 73% | 2664 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 50,038 psi | 82% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,645 psi | 78% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,674 psi | 78% | 2625 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,004 psi | 71% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,317 psi | 58% | 2431 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 38,116 psi | 63% | 2513 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 34,969 psi | 57% | 2490 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,021 psi | 77% | 2641 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,572 psi | 78% | 2648 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,975 psi | 71% | 2621 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 47,007 psi | 77% | 2723 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 39,044 psi | 64% | 2667 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 31,778 psi | 52% | 2425 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 42,801 psi | 70% | 2641 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 35,346 psi | 58% | 2516 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,067 psi | 82% | 2713 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,792 psi | 82% | 2726 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 44% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,626 psi | 68% | 2569 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,427 psi | 76% | 2743 fps | 99.7% |
| ReloadSwiss RS 60 | 63.6 gr | 80% | 37,536 psi | 62% | 2615 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,111 psi | 51% | 2434 fps | 95.2% |
| ReloadSwiss RS 70 | 66.2 gr | 82% | 33,214 psi | 55% | 2493 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 51,097 psi | 84% | 2671 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,860 psi | 74% | 2598 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,276 psi | 63% | 2526 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 98% | 50,937 psi | 84% | 2756 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 96% | 44,092 psi | 72% | 2697 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 41,307 psi | 68% | 2552 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,317 psi | 58% | 2431 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,645 psi | 78% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,004 psi | 71% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 38,116 psi | 63% | 2513 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,146 psi | 64% | 2575 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,660 psi | 80% | 2690 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,470 psi | 76% | 2664 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,095 psi | 79% | 2582 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,277 psi | 66% | 2457 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,334 psi | 65% | 2480 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 43,743 psi | 72% | 2694 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 47,819 psi | 79% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,385 psi | 79% | 2684 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 38,899 psi | 64% | 2530 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 28,485 psi | 47% | 2379 fps | 98% |
| Somchem S385 | <<locked>> | 94% | 41,974 psi | 69% | 2628 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 34,374 psi | 56% | 2474 fps | 96% |
| Vihtavuori N133 | <<locked>> | 80% | 48,530 psi | 80% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,512 psi | 73% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,034 psi | 74% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,086 psi | 61% | 2464 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,040 psi | 54% | 2421 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 80% | 50,343 psi | 83% | 2690 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,439 psi | 71% | 2575 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,663 psi | 54% | 2425 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 29,805 psi | 49% | 2421 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,793 psi | 54% | 2402 fps | 98.2% |
| Winchester 760 | <<locked>> | 82% | 39,073 psi | 64% | 2592 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,991 psi | 43% | 2369 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,224 psi | 76% | 2694 fps | 95.5% |
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 101 powders for .338 Blaser Mag. loaded with the .338 | 215gr | Sierra GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,913 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,913 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 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 215.0 gr projectile in 0.338" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .338 Blaser Mag. 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.