Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 57gr | CutEdge ESP Raptor bullet and 20 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, Accurate 2015 and Alliant Reloder-10x.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 42,366 psi | 89% | 3140 fps | 98.6% |
| Accurate 2015 | <<locked>> | 96% | 42,163 psi | 88% | 3215 fps | 97.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,636 psi | 74% | 3136 fps | 96.4% |
| ADI AR 2207 | <<locked>> | 86% | 42,119 psi | 88% | 3228 fps | 100% |
| Alliant AR-Comp | <<locked>> | 98% | 41,408 psi | 87% | 3301 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 92% | 42,554 psi | 89% | 3258 fps | 98.7% |
| Alliant Reloder-7 | <<locked>> | 84% | 41,234 psi | 86% | 3166 fps | 98.8% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 42,003 psi | 88% | 3123 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,922 psi | 65% | 2133 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 41,959 psi | 88% | 3317 fps | 96.8% |
| IMR 4198 | <<locked>> | 90% | 41,930 psi | 88% | 3205 fps | 99.2% |
| Norma 200 | <<locked>> | 88% | 42,569 psi | 89% | 3245 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,560 psi | 64% | 2178 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 42,641 psi | 89% | 2982 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 41,118 psi | 86% | 3212 fps | 96.6% |
| Somchem S335 | <<locked>> | 98% | 42,438 psi | 89% | 3176 fps | 95.9% |
| Vihtavuori N120 | <<locked>> | 86% | 42,264 psi | 88% | 3182 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 41,147 psi | 86% | 3156 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 98% | 42,960 psi | 90% | 3192 fps | 97.7% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,507 psi | 78% | 3166 fps | 96.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 39,421 psi | 82% | 3074 fps | 97.9% |
| Accurate 2015 | 27.9 gr | 90% | 34,389 psi | 72% | 3035 fps | 95.4% |
| Accurate 2495 | <<locked>> | 98% | 33,243 psi | 69% | 3074 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 34,664 psi | 72% | 3054 fps | 99.5% |
| Alliant AR-Comp | 27 gr | 86% | 28,007 psi | 59% | 2917 fps | 95.2% |
| Alliant Reloder-10x | 25.1 gr | 82% | 30,879 psi | 65% | 2963 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,376 psi | 76% | 3051 fps | 97.7% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 39,262 psi | 82% | 3064 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,481 psi | 47% | 1909 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 37,014 psi | 77% | 3192 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 30,995 psi | 65% | 2920 fps | 96.2% |
| Norma 200 | <<locked>> | 80% | 32,677 psi | 68% | 2999 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,321 psi | 47% | 1959 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 38,377 psi | 80% | 2904 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 38,580 psi | 81% | 3150 fps | 95.8% |
| Somchem S335 | <<locked>> | 96% | 39,566 psi | 83% | 3114 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 34,853 psi | 73% | 3022 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 31,705 psi | 66% | 2917 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 92% | 35,636 psi | 74% | 3025 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 96% | 32,996 psi | 69% | 3045 fps | 95% |
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 20 powders for 6 x 52 R BB2 loaded with the .243 | 57gr | CutEdge ESP Raptor. IMR 3031 delivers the highest muzzle velocity at 3,317 fps; across all powders the maximum-charge window runs from 2,133 fps to 3,317 fps. Accurate 2495 gives the best case fill at 100 %, and 20 of the 20 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 57.0 gr projectile in 0.243" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Hodgdon TrailBoss, IMR 3031 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 AR-Comp, Accurate 2015, Alliant Reloder-10x rank at the top here: for 6 x 52 R BB2 with the .243 | 57gr | CutEdge ESP Raptor 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.