Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 90gr | Berger BT M T bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon LEVERevolution 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>> | 84% | 42,859 psi | 90% | 2641 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 42,264 psi | 88% | 2687 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 41,394 psi | 86% | 2677 fps | 98.8% |
| Accurate 4064 | <<locked>> | 92% | 42,134 psi | 88% | 2713 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 41,916 psi | 88% | 2684 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 84% | 41,684 psi | 87% | 2654 fps | 97.3% |
| Alliant AR-Comp | <<locked>> | 86% | 42,743 psi | 89% | 2713 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 41,756 psi | 87% | 2700 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 41,524 psi | 87% | 2766 fps | 96.2% |
| Bofors RP3 | <<locked>> | 92% | 41,234 psi | 86% | 2703 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 41,249 psi | 86% | 2602 fps | 97.8% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,163 psi | 88% | 2717 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 86% | 42,163 psi | 88% | 2697 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 43,192 psi | 90% | 2766 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,229 psi | 72% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 40,741 psi | 85% | 2648 fps | 96.3% |
| IMR 3031 | <<locked>> | 86% | 40,828 psi | 85% | 2707 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 40,451 psi | 85% | 2687 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 84% | 41,684 psi | 87% | 2654 fps | 97.3% |
| Lovex D073.6 | <<locked>> | 88% | 42,772 psi | 89% | 2717 fps | 99% |
| Lovex S060 | <<locked>> | 86% | 42,743 psi | 89% | 2628 fps | 96.3% |
| Lovex S062 | <<locked>> | 90% | 41,684 psi | 87% | 2667 fps | 97.5% |
| Norma 201 | <<locked>> | 86% | 41,031 psi | 86% | 2641 fps | 97.2% |
| Norma 202 | <<locked>> | 86% | 41,234 psi | 86% | 2661 fps | 99.2% |
| Norma 203B | <<locked>> | 90% | 41,626 psi | 87% | 2700 fps | 96.1% |
| Ramshot X-Terminator | <<locked>> | 82% | 42,540 psi | 89% | 2644 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,360 psi | 72% | 1785 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 41,843 psi | 87% | 2789 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 84% | 42,308 psi | 88% | 2651 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 88% | 41,292 psi | 86% | 2638 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 94% | 40,683 psi | 85% | 2684 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 42,772 psi | 89% | 2717 fps | 99% |
| Shooters World Precision | <<locked>> | 90% | 41,684 psi | 87% | 2667 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 43,076 psi | 90% | 2749 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 43,250 psi | 90% | 2707 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 43,120 psi | 90% | 2615 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 42,337 psi | 88% | 2612 fps | 99.8% |
| Somchem S321 | <<locked>> | 82% | 41,655 psi | 87% | 2674 fps | 97.6% |
| Somchem S335 | <<locked>> | 86% | 42,322 psi | 88% | 2618 fps | 99.7% |
| Somchem S341 | <<locked>> | 86% | 41,727 psi | 87% | 2664 fps | 95.8% |
| Somchem S355 | <<locked>> | 94% | 42,047 psi | 88% | 2697 fps | 96.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,376 psi | 76% | 2657 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 82% | 43,294 psi | 90% | 2608 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 43,004 psi | 90% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 42,482 psi | 89% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 41,176 psi | 86% | 2638 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 96% | 43,178 psi | 90% | 2690 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 84% | 41,684 psi | 87% | 2648 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 90% | 42,409 psi | 89% | 2677 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 42,293 psi | 88% | 2667 fps | 96.5% |
| Winchester 748 | <<locked>> | 86% | 42,975 psi | 90% | 2736 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 42,308 psi | 88% | 2707 fps | 96.8% |
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% | 37,536 psi | 78% | 2539 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 30,168 psi | 63% | 2431 fps | 99% |
| Accurate 2520 | <<locked>> | 80% | 36,216 psi | 76% | 2572 fps | 97.7% |
| Accurate 4064 | 25.2 gr | 80% | 28,543 psi | 60% | 2405 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 84% | 39,494 psi | 83% | 2631 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,680 psi | 77% | 2546 fps | 95.9% |
| Alliant AR-Comp | <<locked>> | 80% | 34,780 psi | 73% | 2562 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 36,608 psi | 76% | 2595 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 94% | 39,189 psi | 82% | 2713 fps | 95.3% |
| Bofors RP3 | <<locked>> | 88% | 36,027 psi | 75% | 2595 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,914 psi | 81% | 2552 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,156 psi | 71% | 2543 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 82% | 37,086 psi | 77% | 2589 fps | 95.2% |
| Hodgdon LEVERevolution | 28.3 gr | 84% | 35,534 psi | 74% | 2598 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,266 psi | 53% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 38,348 psi | 80% | 2598 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 33,330 psi | 70% | 2549 fps | 99% |
| IMR 4895 | <<locked>> | 86% | 38,101 psi | 80% | 2638 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 36,680 psi | 77% | 2546 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 80% | 32,677 psi | 68% | 2503 fps | 96.5% |
| Lovex S060 | <<locked>> | 84% | 40,306 psi | 84% | 2579 fps | 95.6% |
| Lovex S062 | <<locked>> | 84% | 34,505 psi | 72% | 2513 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 33,953 psi | 71% | 2484 fps | 95% |
| Norma 202 | <<locked>> | 80% | 33,663 psi | 70% | 2500 fps | 97.6% |
| Norma 203B | <<locked>> | 88% | 38,827 psi | 81% | 2641 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,755 psi | 83% | 2589 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,512 psi | 53% | 1598 fps | 100% |
| ReloadSwiss RS 60 | 29.1 gr | 86% | 32,271 psi | 67% | 2549 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 37,608 psi | 79% | 2552 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 34,490 psi | 72% | 2490 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 90% | 35,969 psi | 75% | 2585 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,677 psi | 68% | 2503 fps | 96.5% |
| Shooters World Precision | <<locked>> | 84% | 34,505 psi | 72% | 2513 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 40,205 psi | 84% | 2690 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 40,393 psi | 84% | 2648 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,868 psi | 75% | 2470 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,182 psi | 61% | 2329 fps | 97.1% |
| Somchem S321 | <<locked>> | 80% | 38,885 psi | 81% | 2618 fps | 96.9% |
| Somchem S335 | <<locked>> | 80% | 35,157 psi | 73% | 2470 fps | 98.6% |
| Somchem S341 | <<locked>> | 84% | 38,957 psi | 81% | 2605 fps | 95% |
| Somchem S355 | <<locked>> | 90% | 37,289 psi | 78% | 2598 fps | 95.2% |
| Somchem S365 | <<locked>> | 98% | 34,301 psi | 72% | 2605 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 40,770 psi | 85% | 2562 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,853 psi | 75% | 2480 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 30,908 psi | 65% | 2444 fps | 99.1% |
| Vihtavuori N140 | <<locked>> | 80% | 31,966 psi | 67% | 2441 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 88% | 33,098 psi | 69% | 2480 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 36,158 psi | 76% | 2533 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 30,632 psi | 64% | 2418 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 39,581 psi | 83% | 2612 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 35,143 psi | 73% | 2572 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 36,825 psi | 77% | 2592 fps | 95.1% |
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 52 powders for 6 x 52 R BB2 loaded with the .243 | 90gr | Berger BT M T. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,789 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,789 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 72–90 %, 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. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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, Hodgdon LEVERevolution, Accurate 4064 rank at the top here: for 6 x 52 R BB2 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.