Load Specifications
Load data in caliber .240 Flang. N.E. with .243 | 80gr | Remington HP Power-Lokt bullet and 25 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365 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 4350 | <<locked>> | 88% | 39,276 psi | 85% | 3107 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 82% | 41,713 psi | 90% | 3091 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 41,437 psi | 89% | 3114 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 41,524 psi | 89% | 3192 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 86% | 41,379 psi | 89% | 3215 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,988 psi | 88% | 3196 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 41,379 psi | 89% | 3120 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 40,785 psi | 88% | 3120 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 76% | 2129 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 40,437 psi | 87% | 3117 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 41,945 psi | 90% | 3169 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 78% | 2185 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 41,205 psi | 89% | 3228 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,887 psi | 90% | 3189 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 84% | 41,510 psi | 89% | 3117 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 40,016 psi | 86% | 3110 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 41,191 psi | 89% | 2999 fps | 100% |
| Somchem S355 | <<locked>> | 82% | 39,595 psi | 85% | 3061 fps | 98% |
| Somchem S365 | <<locked>> | 92% | 40,422 psi | 87% | 3182 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 40,292 psi | 87% | 3045 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 88% | 41,017 psi | 88% | 3110 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 88% | 40,654 psi | 88% | 3110 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 96% | 39,523 psi | 85% | 3159 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 41,060 psi | 88% | 3081 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,912 psi | 80% | 3189 fps | 98.4% |
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 4350 | <<locked>> | 86% | 36,535 psi | 79% | 3038 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 39,030 psi | 84% | 3025 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,740 psi | 83% | 3051 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,405 psi | 78% | 3051 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,663 psi | 73% | 3002 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,866 psi | 73% | 2999 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 38,638 psi | 83% | 3054 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,444 psi | 68% | 2871 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 57% | 1909 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 38,000 psi | 82% | 3058 fps | 95.9% |
| Norma URP | <<locked>> | 86% | 36,854 psi | 79% | 3045 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,818 psi | 58% | 1959 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,824 psi | 77% | 3084 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 39,117 psi | 84% | 3127 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 36,434 psi | 79% | 2992 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,405 psi | 81% | 3045 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,479 psi | 83% | 2940 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 37,014 psi | 80% | 2995 fps | 97.3% |
| Somchem S365 | 40.3 gr | 82% | 28,950 psi | 62% | 2854 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 35,433 psi | 76% | 2927 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 38,305 psi | 83% | 3041 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 86% | 38,029 psi | 82% | 3048 fps | 95.3% |
| Vihtavuori N555 | 44.5 gr | 92% | 34,360 psi | 74% | 3025 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,415 psi | 68% | 2825 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 32,140 psi | 69% | 3025 fps | 95.9% |
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 25 powders for .240 Flang. N.E. loaded with the .243 | 80gr | Remington HP Power-Lokt. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 2,129 fps to 3,228 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 25 of the 25 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 76–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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, Somchem S365, Vihtavuori N555 rank at the top here: for .240 Flang. N.E. with the .243 | 80gr | Remington HP Power-Lokt 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.