Load Specifications
Bullet Manufacturer:TWENTY-NINE
Bullet Weight:191 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 | 191gr | TWENTY-NINE ERTP bullet and 100 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 Alliant Power Pro 2000-MR.
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% | 52,069 psi | 85% | 2789 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,577 psi | 88% | 2858 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,330 psi | 88% | 2854 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 51,851 psi | 85% | 2871 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,243 psi | 87% | 2841 fps | 96.1% |
| Accurate 4064 | <<locked>> | 92% | 53,432 psi | 88% | 2904 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,707 psi | 87% | 2972 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 54,317 psi | 89% | 2933 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 51,924 psi | 85% | 2877 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,563 psi | 88% | 2887 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,766 psi | 88% | 2861 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,708 psi | 88% | 3048 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,868 psi | 90% | 2953 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,911 psi | 90% | 2838 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,417 psi | 86% | 2923 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,039 psi | 84% | 2976 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,025 psi | 85% | 3018 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,245 psi | 60% | 2697 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,147 psi | 66% | 2844 fps | 96.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,128 psi | 89% | 2946 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 51,895 psi | 85% | 2913 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 52,533 psi | 86% | 2877 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,141 psi | 86% | 2822 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,460 psi | 86% | 2913 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,331 psi | 89% | 3012 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 53,998 psi | 89% | 2881 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,013 psi | 90% | 2907 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,301 psi | 88% | 2927 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 52,257 psi | 86% | 2966 fps | 97% |
| Hodgdon H4895 | <<locked>> | 88% | 54,810 psi | 90% | 2943 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,137 psi | 77% | 2851 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,998 psi | 89% | 2976 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,359 psi | 88% | 3002 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,099 psi | 58% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,736 psi | 87% | 2894 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 54,621 psi | 90% | 2930 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,650 psi | 90% | 2910 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,114 psi | 90% | 2890 fps | 97.3% |
| IMR 4198 | <<locked>> | 82% | 54,911 psi | 90% | 2795 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,489 psi | 86% | 2900 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,549 psi | 90% | 2913 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,850 psi | 82% | 2910 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 53,737 psi | 88% | 2956 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,563 psi | 88% | 2887 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,505 psi | 88% | 2871 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,664 psi | 88% | 2907 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,201 psi | 89% | 2861 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 54,476 psi | 89% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,548 psi | 88% | 2904 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,288 psi | 89% | 2936 fps | 97.5% |
| Norma 201 | <<locked>> | 88% | 53,040 psi | 87% | 2877 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,592 psi | 88% | 2884 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,839 psi | 90% | 2963 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,909 psi | 85% | 2959 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 90% | 51,735 psi | 85% | 2930 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,024 psi | 84% | 2953 fps | 97.6% |
| Ramshot TAC | <<locked>> | 86% | 53,722 psi | 88% | 2900 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,113 psi | 87% | 2920 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,433 psi | 89% | 2884 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,563 psi | 58% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,924 psi | 87% | 2867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,679 psi | 88% | 2907 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,344 psi | 86% | 2986 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 51,909 psi | 85% | 3022 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,359 psi | 86% | 2995 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,533 psi | 86% | 3018 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 86% | 54,070 psi | 89% | 2861 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,490 psi | 88% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 51,764 psi | 85% | 2904 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 52,533 psi | 86% | 2877 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,548 psi | 88% | 2904 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,664 psi | 88% | 2907 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,476 psi | 89% | 2910 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,288 psi | 89% | 2936 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,635 psi | 88% | 2969 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,011 psi | 85% | 2874 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 52,779 psi | 87% | 2904 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,723 psi | 90% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,882 psi | 90% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,027 psi | 89% | 2854 fps | 97.1% |
| Somchem S321 | <<locked>> | 84% | 54,520 psi | 90% | 2917 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,041 psi | 89% | 2818 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 51,561 psi | 85% | 2867 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 52,388 psi | 86% | 2904 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,369 psi | 76% | 2907 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,621 psi | 90% | 2785 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,868 psi | 90% | 2805 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,997 psi | 87% | 2844 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,940 psi | 89% | 2858 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,882 psi | 88% | 2887 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,621 psi | 90% | 2959 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 86% | 53,824 psi | 88% | 2884 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 52,286 psi | 86% | 2858 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,679 psi | 88% | 2966 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,131 psi | 64% | 2779 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,895 psi | 85% | 2890 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 53,621 psi | 88% | 2933 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,489 psi | 86% | 2969 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,503 psi | 53% | 2674 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,504 psi | 86% | 2910 fps | 99.9% |
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% | 45,919 psi | 75% | 2697 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,154 psi | 82% | 2808 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,450 psi | 63% | 2612 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,353 psi | 74% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,893 psi | 82% | 2789 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,318 psi | 60% | 2602 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,679 psi | 57% | 2625 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 42,221 psi | 69% | 2720 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,940 psi | 59% | 2562 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,266 psi | 73% | 2730 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 44,077 psi | 72% | 2723 fps | 100% |
| Alliant Power Pro 2000-MR | 61.8 gr | 80% | 38,218 psi | 63% | 2736 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,404 psi | 58% | 2589 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,576 psi | 85% | 2792 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,000 psi | 62% | 2648 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,273 psi | 58% | 2638 fps | 95.2% |
| Alliant Reloder-17 | 60.8 gr | 80% | 30,429 psi | 50% | 2536 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,169 psi | 53% | 2589 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,594 psi | 62% | 2779 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,263 psi | 68% | 2717 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 34,751 psi | 57% | 2585 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 49,385 psi | 81% | 2825 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,064 psi | 76% | 2720 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,859 psi | 70% | 2749 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,036 psi | 77% | 2890 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,517 psi | 83% | 2828 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,547 psi | 85% | 2858 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,159 psi | 63% | 2644 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 94% | 45,774 psi | 75% | 2851 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,554 psi | 70% | 2730 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,298 psi | 50% | 2480 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,464 psi | 63% | 2697 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 96% | 49,661 psi | 82% | 2936 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 43% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,886 psi | 67% | 2680 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 42,032 psi | 69% | 2733 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,710 psi | 62% | 2598 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,643 psi | 75% | 2726 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 51,837 psi | 85% | 2753 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,371 psi | 81% | 2848 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,411 psi | 75% | 2753 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 35,897 psi | 59% | 2638 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,899 psi | 64% | 2680 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,266 psi | 73% | 2730 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 49,937 psi | 82% | 2815 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,118 psi | 68% | 2700 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,453 psi | 70% | 2657 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,478 psi | 62% | 2605 fps | 98.5% |
| Lovex S065 | <<locked>> | 88% | 39,421 psi | 65% | 2641 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 45,034 psi | 74% | 2776 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,307 psi | 68% | 2671 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,655 psi | 68% | 2687 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,376 psi | 61% | 2638 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 35,230 psi | 58% | 2631 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 36,840 psi | 60% | 2644 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 41,989 psi | 69% | 2782 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,092 psi | 72% | 2726 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,569 psi | 72% | 2753 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,776 psi | 78% | 2776 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 43% | 1627 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,545 psi | 81% | 2812 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,266 psi | 73% | 2740 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,566 psi | 65% | 2749 fps | 97.4% |
| ReloadSwiss RS 60 | 60.8 gr | 80% | 32,401 psi | 53% | 2608 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,043 psi | 61% | 2700 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,205 psi | 66% | 2772 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 45,281 psi | 74% | 2720 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,349 psi | 65% | 2621 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,793 psi | 54% | 2530 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 49,385 psi | 81% | 2825 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,421 psi | 65% | 2641 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,118 psi | 68% | 2700 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,478 psi | 62% | 2605 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 45,034 psi | 74% | 2776 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,765 psi | 55% | 2575 fps | 96% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,322 psi | 69% | 2700 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,756 psi | 67% | 2687 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,931 psi | 70% | 2631 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,563 psi | 58% | 2497 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,440 psi | 73% | 2694 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 47,747 psi | 78% | 2808 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,337 psi | 70% | 2631 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,003 psi | 69% | 2700 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 33,649 psi | 55% | 2536 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 27,731 psi | 46% | 2464 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,530 psi | 80% | 2697 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,178 psi | 71% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,696 psi | 64% | 2612 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,378 psi | 65% | 2618 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,053 psi | 53% | 2477 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,883 psi | 61% | 2631 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 44,222 psi | 73% | 2723 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,927 psi | 62% | 2605 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,230 psi | 59% | 2635 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 34,272 psi | 56% | 2664 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,545 psi | 50% | 2448 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,656 psi | 72% | 2769 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,977 psi | 75% | 2854 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,472 psi | 50% | 2605 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,147 psi | 66% | 2690 fps | 98.5% |
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 100 powders for .338 Blaser Mag. loaded with the .338 | 191gr | TWENTY-NINE ERTP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,048 fps. Accurate 4350 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 53–90 %, leaving at least 10 % headroom. The 191.0 gr projectile in 0.338" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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, Alliant Power Pro 2000-MR rank at the top here: for .338 Blaser Mag. with the .338 | 191gr | TWENTY-NINE ERTP 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.