Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:185 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:1:11.5
Load data in caliber .338 Blaser Mag. with .338 | 185gr | Barnes TTSX BT 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 Power Pro 2000-MR, ReloadSwiss RS 60 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.
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>> | 86% | 53,388 psi | 88% | 2867 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 51,779 psi | 85% | 2890 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,447 psi | 89% | 2927 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 51,764 psi | 85% | 2936 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 51,764 psi | 85% | 2936 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,491 psi | 89% | 2976 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,560 psi | 83% | 2992 fps | 98.8% |
| ADI AR 2206H | <<locked>> | 88% | 52,765 psi | 87% | 2966 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 53,896 psi | 88% | 2963 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 51,967 psi | 85% | 2917 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 51,996 psi | 85% | 2897 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,287 psi | 87% | 3025 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 52,257 psi | 86% | 3077 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,374 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,185 psi | 87% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,940 psi | 89% | 3002 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,559 psi | 81% | 3002 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,085 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,824 psi | 57% | 2707 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 52,518 psi | 86% | 2976 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 53,476 psi | 88% | 2992 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,259 psi | 89% | 2956 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,867 psi | 88% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,447 psi | 89% | 2999 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 52,634 psi | 86% | 3041 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 82% | 52,533 psi | 86% | 2917 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,519 psi | 88% | 2940 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,056 psi | 90% | 3009 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,114 psi | 89% | 3051 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 88% | 53,272 psi | 87% | 2976 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,585 psi | 75% | 2874 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 52,228 psi | 86% | 3005 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 51,735 psi | 85% | 3025 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,780 psi | 57% | 1811 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,621 psi | 90% | 2979 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 52,765 psi | 87% | 2963 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,200 psi | 87% | 2943 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,693 psi | 88% | 2920 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 53,679 psi | 88% | 2835 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,026 psi | 87% | 2940 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,066 psi | 79% | 2933 fps | 98.5% |
| IMR 4895 | <<locked>> | 90% | 51,851 psi | 85% | 2982 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 86% | 51,967 psi | 85% | 2917 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 51,547 psi | 85% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 51,764 psi | 85% | 2936 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 52,765 psi | 87% | 2894 fps | 99.6% |
| Lovex S062 | <<locked>> | 92% | 52,765 psi | 87% | 2940 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 51,982 psi | 85% | 2930 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,576 psi | 86% | 2959 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 54,679 psi | 90% | 2959 fps | 100% |
| Norma 202 | <<locked>> | 88% | 51,866 psi | 85% | 2913 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,113 psi | 87% | 2989 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 50,198 psi | 82% | 2986 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 53,635 psi | 88% | 3015 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,356 psi | 81% | 2976 fps | 97% |
| Ramshot TAC | <<locked>> | 86% | 52,388 psi | 86% | 2930 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 51,547 psi | 85% | 2949 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 52,982 psi | 87% | 2920 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,143 psi | 58% | 1857 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,824 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 51,953 psi | 85% | 2930 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,215 psi | 89% | 3071 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,795 psi | 88% | 3107 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,343 psi | 83% | 3015 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,010 psi | 84% | 3045 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 86% | 52,170 psi | 86% | 2890 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 51,866 psi | 85% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,330 psi | 88% | 2986 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 54,259 psi | 89% | 2956 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 98% | 51,982 psi | 85% | 2930 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 51,764 psi | 85% | 2936 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 52,765 psi | 87% | 2940 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,576 psi | 86% | 2959 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,650 psi | 90% | 2923 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 52,040 psi | 85% | 2999 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,404 psi | 89% | 2900 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,983 psi | 89% | 2959 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,607 psi | 90% | 2986 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,229 psi | 87% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,258 psi | 87% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,431 psi | 86% | 2881 fps | 96.6% |
| Somchem S321 | <<locked>> | 84% | 52,910 psi | 87% | 2949 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 52,576 psi | 86% | 2851 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,592 psi | 88% | 2953 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 53,853 psi | 88% | 2982 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,672 psi | 73% | 2930 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 53,243 psi | 87% | 2822 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,417 psi | 88% | 2838 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,491 psi | 89% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 52,359 psi | 86% | 2890 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 52,098 psi | 86% | 2913 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,881 psi | 87% | 2986 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 86% | 52,388 psi | 86% | 2917 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,070 psi | 89% | 2940 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,851 psi | 85% | 2989 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,347 psi | 61% | 2789 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,896 psi | 88% | 2969 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 51,996 psi | 85% | 2966 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,346 psi | 89% | 3054 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,317 psi | 89% | 2992 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% | 44,222 psi | 73% | 2723 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,254 psi | 79% | 2835 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,347 psi | 60% | 2628 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,003 psi | 69% | 2769 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 42,003 psi | 69% | 2769 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 34,432 psi | 57% | 2615 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 35,288 psi | 58% | 2690 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 40,785 psi | 67% | 2740 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 34,577 psi | 57% | 2582 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,888 psi | 70% | 2756 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 42,308 psi | 69% | 2749 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,995 psi | 82% | 2969 fps | 99.7% |
| Alliant Power Pro 2000-MR | 62.8 gr | 80% | 36,796 psi | 60% | 2749 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,808 psi | 56% | 2602 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,922 psi | 82% | 2825 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,550 psi | 60% | 2667 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,201 psi | 59% | 2713 fps | 95.3% |
| Alliant Reloder-17 | 63.4 gr | 82% | 31,241 psi | 51% | 2608 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,779 psi | 54% | 2651 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,929 psi | 66% | 2740 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 33,098 psi | 54% | 2598 fps | 96.9% |
| Bofors RP7 | <<locked>> | 96% | 51,068 psi | 84% | 2904 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,817 psi | 74% | 2753 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,176 psi | 68% | 2769 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,542 psi | 75% | 2917 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 49,052 psi | 81% | 2864 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,922 psi | 82% | 2887 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 39,291 psi | 65% | 2720 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 96% | 47,297 psi | 78% | 2930 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 41,118 psi | 68% | 2756 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,980 psi | 51% | 2546 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,985 psi | 61% | 2717 fps | 98% |
| Hodgdon Superformance | <<locked>> | 96% | 48,167 psi | 79% | 2959 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,875 psi | 42% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,595 psi | 65% | 2707 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 40,350 psi | 66% | 2756 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,260 psi | 60% | 2618 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,210 psi | 78% | 2808 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 50,604 psi | 83% | 2789 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,876 psi | 77% | 2831 fps | 95.2% |
| IMR 4831 | <<locked>> | 92% | 36,796 psi | 60% | 2707 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 37,434 psi | 61% | 2700 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 80% | 42,888 psi | 70% | 2756 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 48,196 psi | 79% | 2841 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,363 psi | 65% | 2720 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 41,278 psi | 68% | 2684 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 36,027 psi | 59% | 2625 fps | 98% |
| Lovex S065 | <<locked>> | 90% | 40,379 psi | 66% | 2713 fps | 95.1% |
| Lovex S070 | <<locked>> | 96% | 46,311 psi | 76% | 2851 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 39,769 psi | 65% | 2694 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 40,030 psi | 66% | 2707 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 35,911 psi | 59% | 2654 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 36,013 psi | 59% | 2697 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 35,375 psi | 58% | 2661 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 96% | 43,279 psi | 71% | 2861 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 42,801 psi | 70% | 2753 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,018 psi | 69% | 2772 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,296 psi | 76% | 2802 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,136 psi | 43% | 1660 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,080 psi | 79% | 2844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 45,672 psi | 75% | 2818 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,000 psi | 62% | 2766 fps | 96.7% |
| ReloadSwiss RS 60 | 61.9 gr | 80% | 31,169 psi | 51% | 2621 fps | 97.8% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 38,058 psi | 62% | 2776 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,452 psi | 68% | 2848 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 43,410 psi | 71% | 2743 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,855 psi | 62% | 2644 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 31,038 psi | 51% | 2536 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 96% | 51,068 psi | 84% | 2904 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,379 psi | 66% | 2713 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,363 psi | 65% | 2720 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 36,027 psi | 59% | 2625 fps | 98% |
| Shooters World SW4350 | <<locked>> | 96% | 46,311 psi | 76% | 2851 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,937 psi | 84% | 2864 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,387 psi | 53% | 2592 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,039 psi | 84% | 2851 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,799 psi | 67% | 2720 fps | 96.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,320 psi | 65% | 2707 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,495 psi | 68% | 2661 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,200 psi | 56% | 2516 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,658 psi | 75% | 2766 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 46,253 psi | 76% | 2838 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 40,944 psi | 67% | 2661 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,640 psi | 67% | 2723 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 32,198 psi | 53% | 2549 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 28,036 psi | 46% | 2523 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 47,050 psi | 77% | 2730 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,771 psi | 69% | 2657 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,072 psi | 61% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,826 psi | 62% | 2641 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,516 psi | 50% | 2487 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 90% | 37,797 psi | 62% | 2703 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 42,801 psi | 70% | 2749 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 36,506 psi | 60% | 2628 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 37,159 psi | 61% | 2707 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 98% | 34,853 psi | 57% | 2730 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,256 psi | 51% | 2513 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 42,076 psi | 69% | 2792 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 47,500 psi | 78% | 2936 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,624 psi | 63% | 2710 fps | 98% |
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 | 185gr | Barnes TTSX BT. Alliant Reloder-17 delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,811 fps to 3,107 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 57–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.338" calls for a 1:11.5 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .338 Blaser Mag. with the .338 | 185gr | 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.