Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 85gr | Barnes TSX BT bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Accurate 4064.
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 2015 | <<locked>> | 86% | 42,540 psi | 89% | 2720 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 40,364 psi | 84% | 2703 fps | 98.5% |
| Accurate 2495 | <<locked>> | 92% | 41,060 psi | 86% | 2749 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 41,147 psi | 86% | 2756 fps | 98.3% |
| Accurate 4064 | <<locked>> | 94% | 40,973 psi | 86% | 2772 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 41,524 psi | 87% | 2726 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 88% | 42,337 psi | 88% | 2792 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 41,713 psi | 87% | 2812 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 41,191 psi | 86% | 2769 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 82% | 42,772 psi | 89% | 2736 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 40,437 psi | 84% | 2766 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 41,234 psi | 86% | 2677 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 88% | 42,018 psi | 88% | 2792 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 82% | 41,713 psi | 87% | 2753 fps | 99.5% |
| Hodgdon H335 | <<locked>> | 82% | 42,192 psi | 88% | 2762 fps | 99% |
| Hodgdon H4895 | <<locked>> | 88% | 42,279 psi | 88% | 2776 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 43,178 psi | 90% | 2841 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,315 psi | 70% | 1788 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 43,062 psi | 90% | 2835 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 41,524 psi | 87% | 2726 fps | 96.7% |
| Lovex D073.5 | <<locked>> | 84% | 43,163 psi | 90% | 2759 fps | 98% |
| Lovex D073.6 | <<locked>> | 90% | 42,438 psi | 89% | 2789 fps | 98.6% |
| Lovex S062 | <<locked>> | 92% | 41,162 psi | 86% | 2736 fps | 96.8% |
| Norma 201 | <<locked>> | 88% | 40,538 psi | 85% | 2710 fps | 96.5% |
| Norma 202 | <<locked>> | 88% | 40,828 psi | 85% | 2736 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,330 psi | 70% | 1827 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 41,060 psi | 86% | 2720 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 41,858 psi | 87% | 2861 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 86% | 41,756 psi | 87% | 2720 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 90% | 41,191 psi | 86% | 2713 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 96% | 40,335 psi | 84% | 2756 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 42,438 psi | 89% | 2789 fps | 98.6% |
| Shooters World Precision | <<locked>> | 92% | 41,162 psi | 86% | 2736 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 43,149 psi | 90% | 2694 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 42,206 psi | 88% | 2687 fps | 99.5% |
| Somchem S321 | <<locked>> | 84% | 41,626 psi | 87% | 2749 fps | 97.1% |
| Somchem S335 | <<locked>> | 88% | 42,018 psi | 88% | 2690 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 41,858 psi | 87% | 2769 fps | 96% |
| Vihtavuori N130 | <<locked>> | 82% | 40,785 psi | 85% | 2644 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 43,004 psi | 90% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 41,989 psi | 88% | 2756 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 41,249 psi | 86% | 2720 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 98% | 43,163 psi | 90% | 2766 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 86% | 41,524 psi | 87% | 2723 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 92% | 42,409 psi | 89% | 2756 fps | 98.9% |
| Winchester 748 | <<locked>> | 88% | 43,033 psi | 90% | 2818 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 90% | 42,293 psi | 88% | 2782 fps | 96.2% |
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 2015 | <<locked>> | 80% | 34,838 psi | 73% | 2562 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 37,956 psi | 79% | 2651 fps | 97.9% |
| Accurate 2495 | <<locked>> | 80% | 27,050 psi | 57% | 2431 fps | 97.7% |
| Accurate 2520 | <<locked>> | 80% | 33,359 psi | 70% | 2585 fps | 96.2% |
| Accurate 4064 | 26 gr | 82% | 27,369 psi | 57% | 2448 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 82% | 36,463 psi | 76% | 2618 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 32,227 psi | 67% | 2589 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 39,160 psi | 82% | 2756 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 38,725 psi | 81% | 2717 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,161 psi | 84% | 2687 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 37,913 psi | 79% | 2713 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,637 psi | 77% | 2579 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 82% | 33,881 psi | 71% | 2612 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 38,725 psi | 81% | 2690 fps | 99% |
| Hodgdon H335 | <<locked>> | 80% | 39,305 psi | 82% | 2703 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 86% | 39,392 psi | 82% | 2713 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 37,594 psi | 79% | 2720 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,482 psi | 51% | 1598 fps | 100% |
| IMR 3031 | 25.1 gr | 80% | 30,835 psi | 64% | 2562 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 82% | 36,463 psi | 76% | 2618 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 80% | 37,391 psi | 78% | 2641 fps | 96.6% |
| Lovex D073.6 | <<locked>> | 82% | 31,908 psi | 67% | 2559 fps | 95.6% |
| Lovex S062 | <<locked>> | 88% | 36,463 psi | 76% | 2635 fps | 95.3% |
| Norma 201 | <<locked>> | 84% | 35,911 psi | 75% | 2605 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 31,198 psi | 65% | 2513 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,613 psi | 51% | 1637 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,638 psi | 81% | 2667 fps | 97.3% |
| ReloadSwiss RS 60 | 30.6 gr | 90% | 34,055 psi | 71% | 2664 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 34,824 psi | 73% | 2569 fps | 97% |
| Rottweil R 902 | <<locked>> | 86% | 36,129 psi | 75% | 2605 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 94% | 37,826 psi | 79% | 2700 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 82% | 31,908 psi | 67% | 2559 fps | 95.6% |
| Shooters World Precision | <<locked>> | 88% | 36,463 psi | 76% | 2635 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,228 psi | 69% | 2487 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,847 psi | 56% | 2336 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 36,172 psi | 76% | 2631 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 32,779 psi | 68% | 2493 fps | 97.5% |
| Somchem S355 | <<locked>> | 94% | 39,001 psi | 81% | 2710 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 37,956 psi | 79% | 2592 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 33,185 psi | 69% | 2500 fps | 99% |
| Vihtavuori N135 | <<locked>> | 80% | 28,108 psi | 59% | 2448 fps | 97.9% |
| Vihtavuori N140 | <<locked>> | 80% | 29,646 psi | 62% | 2454 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 92% | 34,983 psi | 73% | 2595 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 82% | 36,303 psi | 76% | 2608 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 82% | 30,414 psi | 64% | 2487 fps | 95.6% |
| Winchester 748 | <<locked>> | 82% | 34,751 psi | 73% | 2635 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 39,392 psi | 82% | 2723 fps | 95.3% |
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 47 powders for 6 x 52 R BB2 loaded with the .243 | 85gr | Barnes TSX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,788 fps to 2,861 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 85.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. 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. ReloadSwiss RS 60, IMR 3031, Accurate 4064 rank at the top here: for 6 x 52 R BB2 with the .243 | 85gr | Barnes TSX BT 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.