Load Specifications
Bullet Manufacturer:Barnes
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:1:12.5
Load data in caliber .338 Blaser Mag. with .338 | 225gr | Barnes TTSX BT bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
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>> | 84% | 54,839 psi | 90% | 2592 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,069 psi | 87% | 2615 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,548 psi | 88% | 2671 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,548 psi | 88% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,911 psi | 89% | 2635 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,437 psi | 66% | 2530 fps | 96.9% |
| Accurate 4064 | <<locked>> | 90% | 53,316 psi | 88% | 2664 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,214 psi | 87% | 2753 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 54,012 psi | 89% | 2697 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 51,967 psi | 85% | 2654 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 48,704 psi | 80% | 2680 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,287 psi | 87% | 2654 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,157 psi | 89% | 2621 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,737 psi | 88% | 2818 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,341 psi | 79% | 2677 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,735 psi | 85% | 2674 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,185 psi | 86% | 2694 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,563 psi | 90% | 2808 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 52,344 psi | 86% | 2792 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 47,630 psi | 78% | 2671 fps | 95.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,725 psi | 64% | 2562 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,439 psi | 71% | 2720 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,954 psi | 89% | 2717 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 52,025 psi | 85% | 2687 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,417 psi | 86% | 2661 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,969 psi | 90% | 2635 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,417 psi | 86% | 2680 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,418 psi | 89% | 2776 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 53,200 psi | 87% | 2631 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 53,113 psi | 87% | 2700 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 54,128 psi | 89% | 2776 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 98% | 55,013 psi | 90% | 2740 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 86% | 54,563 psi | 90% | 2707 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,923 psi | 84% | 2687 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,244 psi | 89% | 2743 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,171 psi | 87% | 2789 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,491 psi | 58% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,911 psi | 90% | 2697 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,069 psi | 87% | 2664 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,998 psi | 89% | 2674 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 53,388 psi | 88% | 2651 fps | 98.4% |
| IMR 4350 | <<locked>> | 98% | 52,692 psi | 87% | 2690 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,747 psi | 78% | 2654 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 53,534 psi | 88% | 2720 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,287 psi | 87% | 2654 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,751 psi | 88% | 2674 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,737 psi | 88% | 2631 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,273 psi | 89% | 2677 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,490 psi | 88% | 2684 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 54,346 psi | 89% | 2720 fps | 98.7% |
| Norma 201 | <<locked>> | 86% | 52,605 psi | 86% | 2644 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,461 psi | 88% | 2648 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,810 psi | 90% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 98% | 53,185 psi | 87% | 2736 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 43,511 psi | 71% | 2680 fps | 96.5% |
| Norma URP | <<locked>> | 98% | 52,373 psi | 86% | 2743 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 51,866 psi | 85% | 2707 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,781 psi | 90% | 2792 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 53,287 psi | 87% | 2674 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,852 psi | 87% | 2687 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,940 psi | 89% | 2654 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,824 psi | 59% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,374 psi | 88% | 2684 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,634 psi | 86% | 2756 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 52,011 psi | 85% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,881 psi | 87% | 2776 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,649 psi | 86% | 2805 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 53,476 psi | 88% | 2621 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,127 psi | 87% | 2641 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 51,880 psi | 85% | 2677 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,417 psi | 86% | 2661 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,490 psi | 88% | 2684 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,751 psi | 88% | 2674 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,273 psi | 89% | 2677 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,867 psi | 88% | 2740 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,619 psi | 85% | 2651 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,591 psi | 86% | 2674 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,447 psi | 89% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,534 psi | 90% | 2582 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,737 psi | 88% | 2641 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 54,215 psi | 89% | 2680 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,592 psi | 88% | 2582 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,013 psi | 90% | 2694 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 52,330 psi | 86% | 2677 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,328 psi | 83% | 2743 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,659 psi | 77% | 2631 fps | 96.7% |
| Unknown powder | <<locked>> | 96% | 53,635 psi | 88% | 2749 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 82% | 54,244 psi | 89% | 2546 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,766 psi | 90% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,041 psi | 89% | 2628 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,853 psi | 88% | 2657 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,114 psi | 90% | 2740 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 53,621 psi | 88% | 2651 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 52,156 psi | 86% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,809 psi | 88% | 2743 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,511 psi | 70% | 2631 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,547 psi | 85% | 2667 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,085 psi | 89% | 2703 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,128 psi | 89% | 2776 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,534 psi | 57% | 2569 fps | 99.5% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,892 psi | 80% | 2651 fps | 95.9% |
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 2015 | <<locked>> | 80% | 48,515 psi | 80% | 2510 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,741 psi | 67% | 2438 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,630 psi | 77% | 2572 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,630 psi | 77% | 2572 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 44,121 psi | 72% | 2480 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 35,099 psi | 58% | 2425 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,566 psi | 63% | 2438 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,226 psi | 50% | 2326 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,759 psi | 73% | 2552 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,087 psi | 63% | 2411 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 45,600 psi | 75% | 2625 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,862 psi | 77% | 2556 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,340 psi | 78% | 2536 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,683 psi | 67% | 2589 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 45,310 psi | 74% | 2628 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,594 psi | 62% | 2434 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,393 psi | 66% | 2493 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,067 psi | 51% | 2343 fps | 95.6% |
| Alliant Reloder-17 | 58.2 gr | 80% | 32,358 psi | 53% | 2408 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 44,657 psi | 73% | 2618 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,658 psi | 44% | 2254 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 32,605 psi | 54% | 2474 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,961 psi | 72% | 2559 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 37,043 psi | 61% | 2434 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 40,611 psi | 67% | 2457 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,486 psi | 80% | 2539 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,614 psi | 75% | 2579 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,705 psi | 83% | 2723 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 80% | 49,951 psi | 82% | 2585 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,971 psi | 62% | 2441 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 84% | 38,348 psi | 63% | 2500 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 92% | 45,600 psi | 75% | 2585 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 45,150 psi | 74% | 2562 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,556 psi | 44% | 2195 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,754 psi | 64% | 2493 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 42,815 psi | 70% | 2612 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,324 psi | 43% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,205 psi | 66% | 2457 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 41,205 psi | 68% | 2490 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,217 psi | 61% | 2388 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 39,537 psi | 65% | 2408 fps | 95.3% |
| IMR 4350 | <<locked>> | 90% | 40,944 psi | 67% | 2490 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 30,414 psi | 50% | 2310 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 41,394 psi | 68% | 2523 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 46,862 psi | 77% | 2556 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,801 psi | 72% | 2530 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,817 psi | 74% | 2490 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 39,740 psi | 65% | 2444 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 34,548 psi | 57% | 2343 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 39,697 psi | 65% | 2470 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 43,671 psi | 72% | 2503 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,135 psi | 72% | 2510 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,769 psi | 65% | 2480 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 46,369 psi | 76% | 2625 fps | 95.2% |
| Norma MRP | <<locked>> | 98% | 40,495 psi | 66% | 2618 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 30,792 psi | 51% | 2329 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,349 psi | 65% | 2497 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 36,782 psi | 60% | 2474 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 46,659 psi | 77% | 2566 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,311 psi | 76% | 2585 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,459 psi | 83% | 2605 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 44% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,435 psi | 63% | 2425 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,656 psi | 70% | 2595 fps | 99.2% |
| ReloadSwiss RS 60 | 58.2 gr | 80% | 34,476 psi | 57% | 2470 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,256 psi | 53% | 2395 fps | 95.7% |
| ReloadSwiss RS 70 | 63.5 gr | 86% | 34,809 psi | 57% | 2457 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 47,442 psi | 78% | 2533 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,510 psi | 68% | 2457 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,882 psi | 57% | 2382 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 40,611 psi | 67% | 2457 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,548 psi | 57% | 2343 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,801 psi | 72% | 2530 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,740 psi | 65% | 2444 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,984 psi | 59% | 2434 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,875 psi | 74% | 2543 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,236 psi | 71% | 2523 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,223 psi | 74% | 2454 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,579 psi | 62% | 2333 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,667 psi | 63% | 2388 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 50,633 psi | 83% | 2631 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,686 psi | 73% | 2454 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,744 psi | 73% | 2539 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 35,781 psi | 59% | 2388 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 25,788 psi | 42% | 2231 fps | 96.7% |
| Somchem S385 | <<locked>> | 96% | 40,799 psi | 67% | 2526 fps | 95.2% |
| Unknown powder | <<locked>> | 82% | 33,721 psi | 55% | 2385 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 51,082 psi | 84% | 2507 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,629 psi | 75% | 2444 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,756 psi | 69% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,011 psi | 56% | 2329 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 30,211 psi | 50% | 2283 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 46,949 psi | 77% | 2552 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,132 psi | 66% | 2441 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,676 psi | 52% | 2333 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 28,398 psi | 47% | 2320 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,081 psi | 49% | 2260 fps | 97.2% |
| Winchester 748 | <<locked>> | 80% | 50,415 psi | 83% | 2651 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,348 psi | 63% | 2500 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,629 psi | 44% | 2323 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,629 psi | 75% | 2595 fps | 95% |
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 | 225gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,818 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 57–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:12.5 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. Alliant Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .338 Blaser Mag. with the .338 | 225gr | Barnes TTSX BT 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.