Load Specifications
Load data in caliber .240 Flang. N.E. with .243 | 90gr | Berger BT M T bullet and 26 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Vihtavuori N555.
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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 40,886 psi | 88% | 2966 fps | 96.1% |
| Accurate 4350 | <<locked>> | 86% | 40,132 psi | 86% | 2979 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 88% | 41,698 psi | 90% | 3048 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 84% | 41,742 psi | 90% | 3074 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 41,698 psi | 90% | 3064 fps | 99.4% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,957 psi | 84% | 3005 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 40,596 psi | 87% | 3104 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 41,466 psi | 89% | 2986 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,926 psi | 77% | 2018 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 41,234 psi | 89% | 2986 fps | 98% |
| Lovex S065 | <<locked>> | 84% | 40,959 psi | 88% | 2917 fps | 96.4% |
| Norma URP | <<locked>> | 86% | 39,827 psi | 86% | 2969 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 88% | 41,727 psi | 90% | 3022 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 79% | 2064 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 41,510 psi | 89% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 39,900 psi | 86% | 2995 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 41,959 psi | 90% | 3071 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 41,974 psi | 90% | 2969 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,959 psi | 88% | 2917 fps | 96.4% |
| Somchem S365 | <<locked>> | 90% | 41,118 psi | 89% | 3045 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 40,582 psi | 87% | 2897 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 86% | 41,655 psi | 90% | 2972 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 86% | 41,075 psi | 89% | 2976 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 94% | 40,553 psi | 87% | 3031 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 41,394 psi | 89% | 2946 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,089 psi | 86% | 3153 fps | 99.9% |
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 3100 | <<locked>> | 94% | 38,363 psi | 83% | 2910 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 32,518 psi | 70% | 2785 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,489 psi | 70% | 2799 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,448 psi | 79% | 2943 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,269 psi | 65% | 2756 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,738 psi | 79% | 2946 fps | 95.1% |
| Alliant Reloder-26 | 47 gr | 90% | 35,172 psi | 76% | 2959 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,878 psi | 64% | 2687 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 58% | 1804 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 33,707 psi | 73% | 2802 fps | 95.6% |
| Lovex S065 | <<locked>> | 82% | 38,609 psi | 83% | 2861 fps | 95.7% |
| Norma URP | <<locked>> | 82% | 34,925 psi | 75% | 2848 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 86% | 38,783 psi | 84% | 2949 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 59% | 1850 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,769 psi | 84% | 3015 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,447 psi | 74% | 2861 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,767 psi | 79% | 2936 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 39,160 psi | 84% | 2907 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,609 psi | 83% | 2861 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 29,385 psi | 63% | 2733 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 37,869 psi | 82% | 2838 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 34,084 psi | 73% | 2792 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 33,562 psi | 72% | 2785 fps | 95% |
| Vihtavuori N555 | 41 gr | 86% | 30,980 psi | 67% | 2785 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,605 psi | 72% | 2756 fps | 97.7% |
| Winchester StaBALL HD | 45.2 gr | 90% | 28,747 psi | 62% | 2785 fps | 95.7% |
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 26 powders for .240 Flang. N.E. loaded with the .243 | 90gr | Berger BT M T. Winchester StaBALL HD delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,153 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 26 of the 26 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, ReloadSwiss RS 14 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-26, Winchester StaBALL HD, Vihtavuori N555 rank at the top here: for .240 Flang. N.E. with the .243 | 90gr | Berger BT M T 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.