Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 85gr | Frontier PH HPFB bullet and 44 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 Lovex D073.6.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 41,437 psi | 87% | 2690 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 42,322 psi | 88% | 2733 fps | 98.8% |
| Accurate 2495 | <<locked>> | 92% | 43,076 psi | 90% | 2779 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 42,627 psi | 89% | 2779 fps | 98.6% |
| Accurate 4064 | <<locked>> | 94% | 43,221 psi | 90% | 2808 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 42,772 psi | 89% | 2746 fps | 97% |
| Alliant AR-Comp | <<locked>> | 86% | 41,017 psi | 86% | 2762 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 43,047 psi | 90% | 2835 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 42,511 psi | 89% | 2789 fps | 96.7% |
| Bofors RP3 | <<locked>> | 94% | 42,351 psi | 88% | 2799 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 42,786 psi | 89% | 2703 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 86% | 40,437 psi | 84% | 2753 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 82% | 42,931 psi | 90% | 2769 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 41,495 psi | 87% | 2802 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,881 psi | 71% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 42,119 psi | 88% | 2746 fps | 96% |
| IMR 3031 | <<locked>> | 88% | 41,756 psi | 87% | 2805 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 42,772 psi | 89% | 2746 fps | 97% |
| Lovex D073.5 | <<locked>> | 82% | 42,134 psi | 88% | 2733 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 88% | 40,915 psi | 85% | 2753 fps | 98.3% |
| Lovex S062 | <<locked>> | 92% | 42,989 psi | 90% | 2766 fps | 97.2% |
| Norma 201 | <<locked>> | 88% | 41,989 psi | 88% | 2733 fps | 96.9% |
| Norma 202 | <<locked>> | 88% | 42,177 psi | 88% | 2756 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,968 psi | 71% | 1837 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 42,293 psi | 88% | 2740 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 43,018 psi | 90% | 2884 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 84% | 40,973 psi | 86% | 2697 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 90% | 42,699 psi | 89% | 2736 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 96% | 41,829 psi | 87% | 2776 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 40,915 psi | 85% | 2753 fps | 98.3% |
| Shooters World Precision | <<locked>> | 92% | 42,989 psi | 90% | 2766 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 41,771 psi | 87% | 2664 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 40,828 psi | 85% | 2654 fps | 99.4% |
| Somchem S321 | <<locked>> | 82% | 40,495 psi | 85% | 2723 fps | 96.8% |
| Somchem S335 | <<locked>> | 86% | 40,973 psi | 86% | 2664 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 43,265 psi | 90% | 2792 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 82% | 42,061 psi | 88% | 2664 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 41,626 psi | 87% | 2667 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 90% | 40,814 psi | 85% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 42,525 psi | 89% | 2736 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 96% | 41,365 psi | 86% | 2726 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 86% | 42,772 psi | 89% | 2743 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 90% | 41,220 psi | 86% | 2726 fps | 98.7% |
| Winchester 748 | <<locked>> | 86% | 41,321 psi | 86% | 2779 fps | 97.7% |
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 2015 | <<locked>> | 80% | 36,332 psi | 76% | 2585 fps | 99.5% |
| Accurate 2460 | <<locked>> | 80% | 39,508 psi | 83% | 2677 fps | 98.3% |
| Accurate 2495 | <<locked>> | 80% | 28,906 psi | 60% | 2467 fps | 98.3% |
| Accurate 2520 | <<locked>> | 80% | 34,809 psi | 73% | 2612 fps | 96.7% |
| Accurate 4064 | <<locked>> | 80% | 27,383 psi | 57% | 2438 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 82% | 37,623 psi | 79% | 2638 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 33,518 psi | 70% | 2612 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,466 psi | 85% | 2779 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 37,304 psi | 78% | 2680 fps | 95.1% |
| Bofors RP3 | <<locked>> | 90% | 36,709 psi | 77% | 2680 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,753 psi | 79% | 2598 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 35,534 psi | 74% | 2644 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 39,958 psi | 83% | 2710 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 39,160 psi | 82% | 2749 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,063 psi | 52% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 39,349 psi | 82% | 2690 fps | 95.2% |
| IMR 3031 | 25.2 gr | 80% | 32,126 psi | 67% | 2589 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 82% | 37,623 psi | 79% | 2638 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 80% | 39,305 psi | 82% | 2674 fps | 97.1% |
| Lovex D073.6 | 26.9 gr | 80% | 31,343 psi | 65% | 2536 fps | 95.3% |
| Lovex S062 | <<locked>> | 86% | 35,679 psi | 75% | 2608 fps | 95% |
| Norma 201 | <<locked>> | 84% | 37,362 psi | 78% | 2631 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 32,489 psi | 68% | 2539 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,266 psi | 53% | 1647 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,871 psi | 83% | 2687 fps | 97.7% |
| ReloadSwiss RS 60 | 30.8 gr | 90% | 35,476 psi | 74% | 2700 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 36,419 psi | 76% | 2598 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 86% | 37,521 psi | 78% | 2628 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 94% | 39,305 psi | 82% | 2726 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,343 psi | 65% | 2536 fps | 95.3% |
| Shooters World Precision | <<locked>> | 86% | 35,679 psi | 75% | 2608 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,461 psi | 72% | 2507 fps | 97.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,949 psi | 58% | 2359 fps | 96% |
| Somchem S321 | <<locked>> | 80% | 37,507 psi | 78% | 2654 fps | 95.9% |
| Somchem S335 | <<locked>> | 80% | 34,084 psi | 71% | 2516 fps | 97.9% |
| Somchem S355 | <<locked>> | 94% | 40,770 psi | 85% | 2743 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 39,218 psi | 82% | 2608 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,389 psi | 72% | 2520 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 80% | 29,443 psi | 62% | 2474 fps | 98.3% |
| Vihtavuori N140 | <<locked>> | 80% | 30,850 psi | 64% | 2480 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 90% | 34,113 psi | 71% | 2569 fps | 95% |
| Vihtavuori N530 | <<locked>> | 82% | 37,507 psi | 78% | 2631 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 29,530 psi | 62% | 2454 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 33,910 psi | 71% | 2608 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 44 powders for 6 x 52 R BB2 loaded with the .243 | 85gr | Frontier PH HPFB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,884 fps; across all powders the maximum-charge window runs from 1,795 fps to 2,884 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 44 of the 44 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 71–90 %, 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, Lovex D073.6 rank at the top here: for 6 x 52 R BB2 with the .243 | 85gr | Frontier PH HPFB 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.