Load Specifications
Bullet:.416 | 270gr | Impala LW CFN
Bullet Manufacturer:Impala Bullets
Bullet Weight:270 gr
Bullet Diameter:0.416"
Bullet Length:<<locked>>
Caliber:.416 Weath. Mag. load data
Case Length (l3):2.913"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:140 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Load data in caliber .416 Weath. Mag. with .416 | 270gr | Impala LW CFN 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 55,085 psi | 86% | 2989 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,884 psi | 89% | 3068 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,462 psi | 85% | 3022 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,071 psi | 86% | 3081 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,825 psi | 87% | 3045 fps | 95.8% |
| Accurate 4064 | <<locked>> | 92% | 57,406 psi | 90% | 3120 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 3192 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 88% | 56,884 psi | 89% | 3140 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 57,435 psi | 90% | 3130 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,869 psi | 88% | 3084 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,594 psi | 89% | 3064 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,086 psi | 88% | 3261 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 57,725 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,740 psi | 90% | 3038 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,027 psi | 86% | 3127 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3182 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,520 psi | 85% | 3232 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,972 psi | 61% | 2900 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,105 psi | 68% | 3061 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,478 psi | 89% | 3150 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 55,230 psi | 87% | 3127 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 55,114 psi | 86% | 3081 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,653 psi | 90% | 3068 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,347 psi | 87% | 3123 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,782 psi | 89% | 3222 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 56,405 psi | 88% | 3081 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 57,537 psi | 90% | 3110 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,086 psi | 88% | 3133 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 98% | 54,752 psi | 86% | 3176 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 88% | 57,392 psi | 90% | 3150 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,821 psi | 78% | 3054 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,478 psi | 89% | 3186 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,666 psi | 87% | 3209 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 56% | 1890 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,955 psi | 86% | 3094 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 57,290 psi | 90% | 3136 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 57,217 psi | 90% | 3117 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 57,319 psi | 90% | 3087 fps | 97% |
| IMR 4198 | <<locked>> | 82% | 57,000 psi | 89% | 2986 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3100 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,753 psi | 89% | 3114 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3120 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 56,347 psi | 88% | 3163 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 55,869 psi | 88% | 3084 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,782 psi | 89% | 3077 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,014 psi | 89% | 3120 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,304 psi | 88% | 3054 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 57,392 psi | 90% | 3120 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,449 psi | 88% | 3110 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 3146 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 56,144 psi | 88% | 3084 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,304 psi | 88% | 3087 fps | 100% |
| Norma 203B | <<locked>> | 92% | 57,508 psi | 90% | 3169 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3169 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 90% | 54,317 psi | 85% | 3140 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,403 psi | 84% | 3159 fps | 97.3% |
| Ramshot TAC | <<locked>> | 86% | 56,144 psi | 88% | 3100 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,651 psi | 87% | 3123 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,855 psi | 89% | 3087 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 57% | 1936 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,434 psi | 87% | 3068 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,246 psi | 88% | 3110 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,071 psi | 86% | 3199 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,259 psi | 85% | 3235 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3209 fps | 98.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 3232 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 86% | 57,696 psi | 90% | 3071 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,652 psi | 89% | 3081 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,114 psi | 86% | 3117 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 55,114 psi | 86% | 3081 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,449 psi | 88% | 3110 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,014 psi | 89% | 3120 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,392 psi | 90% | 3120 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 3146 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,115 psi | 88% | 3176 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,824 psi | 86% | 3081 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,129 psi | 86% | 3107 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,276 psi | 90% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 57,174 psi | 90% | 3012 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,869 psi | 89% | 3058 fps | 96.9% |
| Somchem S321 | <<locked>> | 84% | 57,305 psi | 90% | 3127 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,840 psi | 89% | 3018 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,696 psi | 90% | 3130 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 55,361 psi | 87% | 3114 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 3120 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,130 psi | 90% | 2979 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 57,232 psi | 90% | 2999 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,043 psi | 88% | 3048 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,550 psi | 89% | 3061 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,521 psi | 89% | 3091 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3166 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 86% | 56,449 psi | 88% | 3087 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,897 psi | 86% | 3061 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 3173 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,279 psi | 66% | 2989 fps | 97.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3146 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 56,086 psi | 88% | 3140 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,027 psi | 86% | 3179 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,186 psi | 55% | 2884 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,969 psi | 86% | 3114 fps | 99.8% |
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 2015 | <<locked>> | 80% | 48,994 psi | 77% | 2890 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,519 psi | 84% | 3015 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,859 psi | 67% | 2825 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,544 psi | 76% | 2969 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,388 psi | 82% | 2986 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 40,393 psi | 63% | 2815 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 38,029 psi | 60% | 2835 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 44,904 psi | 70% | 2913 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 38,305 psi | 60% | 2749 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,775 psi | 73% | 2923 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 46,905 psi | 74% | 2917 fps | 100% |
| Alliant Power Pro 2000-MR | 99.8 gr | 80% | 40,640 psi | 64% | 2933 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,072 psi | 60% | 2779 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 54,534 psi | 85% | 2989 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,872 psi | 64% | 2844 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 37,681 psi | 59% | 2835 fps | 95.2% |
| Alliant Reloder-17 | 98.3 gr | 80% | 33,112 psi | 52% | 2736 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,982 psi | 52% | 2733 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,379 psi | 63% | 2992 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,772 psi | 69% | 2910 fps | 97.2% |
| Bofors RP3 | <<locked>> | 80% | 38,116 psi | 60% | 2792 fps | 97.9% |
| Bofors RP7 | <<locked>> | 94% | 52,011 psi | 82% | 3022 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,428 psi | 76% | 2910 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,745 psi | 72% | 2949 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,617 psi | 78% | 3094 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 53,098 psi | 83% | 3028 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 54,027 psi | 85% | 3054 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,711 psi | 61% | 2785 fps | 95% |
| Hodgdon H414 | <<locked>> | 94% | 48,385 psi | 76% | 3054 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,339 psi | 71% | 2927 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,996 psi | 52% | 2674 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,002 psi | 64% | 2890 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 51,996 psi | 81% | 3140 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 42% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,308 psi | 68% | 2871 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 44,744 psi | 70% | 2927 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,176 psi | 63% | 2785 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 47,906 psi | 75% | 2917 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 53,882 psi | 84% | 2940 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 51,576 psi | 81% | 3045 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 50,401 psi | 79% | 2999 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 36,651 psi | 57% | 2782 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,771 psi | 65% | 2881 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,775 psi | 73% | 2923 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 53,272 psi | 83% | 3022 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,309 psi | 69% | 2900 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 44,773 psi | 70% | 2844 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 40,480 psi | 63% | 2802 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 42,337 psi | 66% | 2841 fps | 95.1% |
| Lovex S070 | <<locked>> | 94% | 47,979 psi | 75% | 2979 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 44,483 psi | 70% | 2871 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 44,338 psi | 69% | 2877 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,277 psi | 63% | 2835 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 37,913 psi | 59% | 2828 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 39,436 psi | 62% | 2841 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 44,498 psi | 70% | 2982 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 46,586 psi | 73% | 2920 fps | 96.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,079 psi | 72% | 2946 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,285 psi | 79% | 2972 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 43% | 1729 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,098 psi | 82% | 3012 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 46,702 psi | 73% | 2933 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,322 psi | 66% | 2953 fps | 97.4% |
| ReloadSwiss RS 60 | 98.3 gr | 80% | 35,041 psi | 55% | 2808 fps | 98.6% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,871 psi | 62% | 2907 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,525 psi | 67% | 2969 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 48,820 psi | 77% | 2923 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,540 psi | 67% | 2822 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,100 psi | 57% | 2733 fps | 97% |
| Rottweil R 907 | <<locked>> | 94% | 52,011 psi | 82% | 3022 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,337 psi | 66% | 2841 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,309 psi | 69% | 2900 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 40,480 psi | 63% | 2802 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 47,979 psi | 75% | 2979 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,332 psi | 57% | 2769 fps | 96.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,252 psi | 71% | 2900 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,265 psi | 68% | 2877 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,426 psi | 71% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,971 psi | 60% | 2677 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 50,125 psi | 79% | 2946 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 50,517 psi | 79% | 3012 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 45,208 psi | 71% | 2825 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,614 psi | 70% | 2894 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 36,695 psi | 57% | 2733 fps | 97% |
| Somchem S365 | <<locked>> | 82% | 28,805 psi | 45% | 2608 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 50,966 psi | 80% | 2884 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,542 psi | 71% | 2812 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,655 psi | 65% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,032 psi | 66% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,882 psi | 55% | 2667 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 88% | 39,494 psi | 62% | 2828 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 46,891 psi | 73% | 2920 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 40,553 psi | 64% | 2795 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 39,044 psi | 61% | 2831 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 94% | 35,375 psi | 55% | 2822 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,895 psi | 52% | 2631 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 46,253 psi | 72% | 2969 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 48,588 psi | 76% | 3061 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,228 psi | 52% | 2818 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,728 psi | 67% | 2884 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 111 powders for .416 Weath. Mag. loaded with the .416 | 270gr | Impala LW CFN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 1,890 fps to 3,261 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. Accurate 3100, Accurate 4350, ADI AR 2209 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 .416 Weath. Mag. with the .416 | 270gr | Impala LW CFN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.