Load Specifications
Load data in caliber .340 Weath. Mag. with .338 | 180gr | Impala LW CFN bullet and 96 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 55,477 psi | 87% | 2986 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,259 psi | 87% | 3009 fps | 97% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,486 psi | 76% | 2986 fps | 97.5% |
| Accurate 4064 | <<locked>> | 86% | 55,288 psi | 87% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 57,609 psi | 90% | 3169 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 56,666 psi | 89% | 3097 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,276 psi | 90% | 3094 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,491 psi | 85% | 3123 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,230 psi | 87% | 3038 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,797 psi | 89% | 3015 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,086 psi | 88% | 3222 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,679 psi | 86% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,245 psi | 87% | 3094 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,392 psi | 90% | 3215 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,230 psi | 87% | 3199 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,650 psi | 84% | 3114 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,237 psi | 71% | 3012 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 3192 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,028 psi | 88% | 3104 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 55,854 psi | 88% | 3091 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 55,361 psi | 87% | 3054 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,739 psi | 89% | 3018 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,274 psi | 87% | 3077 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,159 psi | 88% | 3097 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 55,666 psi | 87% | 3150 fps | 98% |
| Hodgdon H4350 | <<locked>> | 92% | 55,854 psi | 88% | 3104 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 84% | 57,217 psi | 90% | 3107 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,711 psi | 90% | 3133 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,768 psi | 89% | 3140 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,898 psi | 88% | 3182 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 57% | 1913 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,621 psi | 86% | 3051 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,435 psi | 90% | 3087 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,029 psi | 89% | 3077 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,579 psi | 89% | 3051 fps | 98% |
| IMR 4350 | <<locked>> | 96% | 55,187 psi | 86% | 3074 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,492 psi | 89% | 3077 fps | 97.9% |
| IMR 4831 | <<locked>> | 98% | 57,624 psi | 90% | 3150 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 56,565 psi | 89% | 3127 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,230 psi | 87% | 3038 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,217 psi | 90% | 3074 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,550 psi | 87% | 3015 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 57,421 psi | 90% | 3077 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,913 psi | 89% | 3084 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 54,578 psi | 86% | 3068 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 56,086 psi | 88% | 3048 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,985 psi | 88% | 3038 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,711 psi | 90% | 3130 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,883 psi | 88% | 3127 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 50,198 psi | 79% | 3136 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 55,854 psi | 88% | 3146 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 54,679 psi | 86% | 3100 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 54,404 psi | 85% | 3136 fps | 98.5% |
| Ramshot TAC | <<locked>> | 82% | 55,448 psi | 87% | 3058 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,201 psi | 87% | 3077 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 58% | 1962 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,101 psi | 88% | 3074 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,535 psi | 87% | 3163 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,824 psi | 86% | 3192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,855 psi | 89% | 3182 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,593 psi | 87% | 3205 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 57,493 psi | 90% | 3031 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,637 psi | 89% | 3045 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,941 psi | 88% | 3084 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3100 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 55,361 psi | 87% | 3054 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,913 psi | 89% | 3084 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,217 psi | 90% | 3074 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 57,421 psi | 90% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,578 psi | 86% | 3068 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,637 psi | 89% | 3136 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,476 psi | 85% | 3038 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,940 psi | 86% | 3064 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,623 psi | 89% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,753 psi | 89% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,826 psi | 89% | 3028 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 3094 fps | 95.8% |
| Somchem S335 | <<locked>> | 84% | 56,492 psi | 89% | 2972 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,159 psi | 90% | 3081 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,811 psi | 87% | 3081 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 3202 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3081 fps | 97% |
| Vihtavuori N133 | <<locked>> | 84% | 56,768 psi | 89% | 2953 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,130 psi | 88% | 3002 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,492 psi | 89% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,014 psi | 89% | 3051 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,665 psi | 86% | 3084 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 55,898 psi | 88% | 3041 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,766 psi | 86% | 3012 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,348 psi | 90% | 3146 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,357 psi | 79% | 3097 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,360 psi | 85% | 3051 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,898 psi | 88% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,854 psi | 88% | 3153 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,060 psi | 64% | 3038 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,897 psi | 86% | 3071 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 49,226 psi | 77% | 2890 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 48,878 psi | 77% | 2894 fps | 95.6% |
| Accurate 3100 | <<locked>> | 94% | 40,263 psi | 63% | 2822 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 46,485 psi | 73% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,838 psi | 55% | 2713 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 50,285 psi | 79% | 2989 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 42,975 psi | 67% | 2831 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 51,401 psi | 81% | 3068 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,040 psi | 82% | 2986 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,243 psi | 83% | 2969 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,035 psi | 72% | 3031 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,279 psi | 68% | 2861 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,108 psi | 72% | 2927 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,026 psi | 53% | 2710 fps | 95.2% |
| Alliant Reloder-17 | 70.3 gr | 80% | 37,782 psi | 59% | 2844 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 50,517 psi | 79% | 3058 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,472 psi | 48% | 2631 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,796 psi | 58% | 2871 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,429 psi | 77% | 2989 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 43,874 psi | 69% | 2881 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 46,398 psi | 73% | 2887 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,490 psi | 84% | 2966 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,880 psi | 81% | 3022 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,048 psi | 69% | 2874 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 43,395 psi | 68% | 2917 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 49,501 psi | 78% | 2992 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 50,749 psi | 80% | 2999 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,734 psi | 50% | 2612 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,862 psi | 73% | 2972 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 45,876 psi | 72% | 2992 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 43% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,385 psi | 76% | 2943 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 50,952 psi | 80% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,165 psi | 71% | 2867 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,282 psi | 74% | 2884 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 46,296 psi | 73% | 2913 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,759 psi | 70% | 2861 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 33,489 psi | 52% | 2664 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 47,166 psi | 74% | 2959 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 52,040 psi | 82% | 2986 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,618 psi | 79% | 2972 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,530 psi | 78% | 2910 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 45,672 psi | 72% | 2874 fps | 99.8% |
| Lovex S065 | <<locked>> | 80% | 38,159 psi | 60% | 2713 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 43,366 psi | 68% | 2851 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 49,937 psi | 78% | 2943 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,821 psi | 78% | 2940 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,498 psi | 71% | 2917 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 52,272 psi | 82% | 3064 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 44,324 psi | 69% | 3012 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 34,418 psi | 54% | 2703 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 45,020 psi | 71% | 2927 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 40,045 psi | 63% | 2851 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 52,083 psi | 82% | 2999 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,909 psi | 81% | 3022 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 43% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,932 psi | 69% | 2848 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,733 psi | 76% | 3041 fps | 99.3% |
| ReloadSwiss RS 60 | 70.3 gr | 80% | 39,885 psi | 63% | 2907 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,274 psi | 57% | 2779 fps | 95.7% |
| ReloadSwiss RS 70 | 75 gr | 84% | 38,072 psi | 60% | 2835 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 54,389 psi | 85% | 2982 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,630 psi | 75% | 2894 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 41,408 psi | 65% | 2822 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 49,574 psi | 78% | 3041 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 46,398 psi | 73% | 2887 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,159 psi | 60% | 2713 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,618 psi | 79% | 2972 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,672 psi | 72% | 2874 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 43,366 psi | 68% | 2851 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,481 psi | 65% | 2858 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,155 psi | 80% | 2982 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,588 psi | 76% | 2953 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,386 psi | 79% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,569 psi | 67% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,686 psi | 70% | 2812 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 49,110 psi | 77% | 3035 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 50,386 psi | 79% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,401 psi | 79% | 2969 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 41,814 psi | 66% | 2822 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 31,372 psi | 49% | 2664 fps | 97.7% |
| Somchem S385 | <<locked>> | 96% | 47,645 psi | 75% | 2969 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 50,604 psi | 79% | 2861 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,224 psi | 74% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,253 psi | 74% | 2871 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,740 psi | 62% | 2746 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 35,636 psi | 56% | 2700 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 52,518 psi | 82% | 2989 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,861 psi | 72% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,418 psi | 56% | 2707 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 33,127 psi | 52% | 2720 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,114 psi | 55% | 2667 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 52,576 psi | 82% | 3038 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 43,569 psi | 68% | 2920 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,748 psi | 48% | 2723 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,457 psi | 76% | 2963 fps | 99.8% |
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 96 powders for .340 Weath. Mag. loaded with the .338 | 180gr | Impala LW CFN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,222 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 180.0 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 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .340 Weath. Mag. with the .338 | 180gr | Impala LW CFN 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.