Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 85gr | Frontier PH HPBT bullet and 45 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 IMR 3031.
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% | 41,466 psi | 87% | 2694 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 42,293 psi | 88% | 2736 fps | 98.9% |
| Accurate 2495 | <<locked>> | 90% | 40,857 psi | 85% | 2740 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 42,989 psi | 90% | 2785 fps | 98.7% |
| Accurate 4064 | <<locked>> | 94% | 43,207 psi | 90% | 2812 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 43,091 psi | 90% | 2756 fps | 97.2% |
| Alliant AR-Comp | <<locked>> | 86% | 41,437 psi | 87% | 2772 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 42,917 psi | 90% | 2802 fps | 96.9% |
| Bofors RP3 | <<locked>> | 94% | 42,743 psi | 89% | 2808 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 42,772 psi | 89% | 2707 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 86% | 40,828 psi | 85% | 2762 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 86% | 41,046 psi | 86% | 2749 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 41,800 psi | 87% | 2812 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,620 psi | 70% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 42,482 psi | 89% | 2759 fps | 96.2% |
| IMR 3031 | <<locked>> | 88% | 42,192 psi | 88% | 2815 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 43,091 psi | 90% | 2756 fps | 97.2% |
| Lovex D073.5 | <<locked>> | 82% | 42,090 psi | 88% | 2733 fps | 97.9% |
| Lovex D073.6 | <<locked>> | 88% | 41,336 psi | 86% | 2766 fps | 98.4% |
| Lovex S062 | <<locked>> | 92% | 42,946 psi | 90% | 2769 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 42,366 psi | 89% | 2743 fps | 97.1% |
| Norma 202 | <<locked>> | 88% | 42,554 psi | 89% | 2766 fps | 99.1% |
| Norma 203B | <<locked>> | 92% | 43,207 psi | 90% | 2808 fps | 95.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,142 psi | 71% | 1844 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 42,714 psi | 89% | 2749 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 43,279 psi | 90% | 2894 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 84% | 41,408 psi | 87% | 2710 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 90% | 42,598 psi | 89% | 2740 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 96% | 42,206 psi | 88% | 2789 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 41,336 psi | 86% | 2766 fps | 98.4% |
| Shooters World Precision | <<locked>> | 92% | 42,946 psi | 90% | 2769 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 42,221 psi | 88% | 2674 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 41,205 psi | 86% | 2664 fps | 99.5% |
| Somchem S321 | <<locked>> | 84% | 43,294 psi | 90% | 2782 fps | 97.5% |
| Somchem S335 | <<locked>> | 86% | 41,321 psi | 86% | 2674 fps | 99.4% |
| Somchem S355 | <<locked>> | 94% | 40,712 psi | 85% | 2743 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 82% | 42,032 psi | 88% | 2664 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 42,061 psi | 88% | 2680 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 41,263 psi | 86% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 42,873 psi | 90% | 2746 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 96% | 41,727 psi | 87% | 2736 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 86% | 43,163 psi | 90% | 2753 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 90% | 41,162 psi | 86% | 2730 fps | 98.8% |
| Winchester 748 | <<locked>> | 86% | 41,655 psi | 87% | 2789 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 40,959 psi | 86% | 2753 fps | 95.9% |
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% | 36,709 psi | 77% | 2598 fps | 99.6% |
| Accurate 2460 | <<locked>> | 80% | 39,508 psi | 83% | 2680 fps | 98.3% |
| Accurate 2495 | <<locked>> | 80% | 29,240 psi | 61% | 2480 fps | 98.5% |
| Accurate 2520 | <<locked>> | 80% | 35,143 psi | 73% | 2621 fps | 96.9% |
| Accurate 4064 | <<locked>> | 80% | 27,717 psi | 58% | 2448 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 38,029 psi | 79% | 2651 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 33,924 psi | 71% | 2625 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 37,710 psi | 79% | 2694 fps | 95.3% |
| Bofors RP3 | <<locked>> | 90% | 37,043 psi | 77% | 2690 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,768 psi | 79% | 2602 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 35,520 psi | 74% | 2648 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 84% | 38,334 psi | 80% | 2690 fps | 95% |
| Hodgdon LEVERevolution | 30.1 gr | 88% | 39,117 psi | 82% | 2753 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,889 psi | 52% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 39,653 psi | 83% | 2700 fps | 95.3% |
| IMR 3031 | 25.3 gr | 80% | 32,140 psi | 67% | 2595 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 82% | 38,029 psi | 79% | 2651 fps | 95.7% |
| Lovex D073.5 | <<locked>> | 80% | 39,291 psi | 82% | 2677 fps | 97.2% |
| Lovex D073.6 | <<locked>> | 80% | 31,357 psi | 66% | 2539 fps | 95.4% |
| Lovex S062 | <<locked>> | 86% | 35,636 psi | 74% | 2612 fps | 95.1% |
| Norma 201 | <<locked>> | 84% | 37,304 psi | 78% | 2635 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 32,866 psi | 69% | 2552 fps | 96.8% |
| Norma 203B | <<locked>> | 90% | 40,350 psi | 84% | 2749 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,106 psi | 52% | 1647 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,842 psi | 83% | 2690 fps | 97.7% |
| ReloadSwiss RS 60 | 31 gr | 90% | 35,752 psi | 75% | 2713 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 36,463 psi | 76% | 2602 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 84% | 35,766 psi | 75% | 2592 fps | 95% |
| Rottweil R 903 | <<locked>> | 94% | 39,697 psi | 83% | 2740 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,357 psi | 66% | 2539 fps | 95.4% |
| Shooters World Precision | <<locked>> | 86% | 35,636 psi | 74% | 2612 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,824 psi | 73% | 2520 fps | 97.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,268 psi | 59% | 2372 fps | 96.2% |
| Somchem S321 | <<locked>> | 80% | 37,826 psi | 79% | 2667 fps | 96.1% |
| Somchem S335 | <<locked>> | 80% | 34,389 psi | 72% | 2526 fps | 98% |
| Somchem S355 | <<locked>> | 92% | 38,363 psi | 80% | 2694 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 39,639 psi | 83% | 2621 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,722 psi | 73% | 2533 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 80% | 29,791 psi | 62% | 2487 fps | 98.5% |
| Vihtavuori N140 | <<locked>> | 80% | 30,850 psi | 64% | 2484 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 90% | 34,418 psi | 72% | 2582 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 82% | 37,898 psi | 79% | 2644 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 29,834 psi | 62% | 2467 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 34,214 psi | 71% | 2621 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 38,247 psi | 80% | 2697 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 45 powders for 6 x 52 R BB2 loaded with the .243 | 85gr | Frontier PH HPBT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,894 fps; across all powders the maximum-charge window runs from 1,795 fps to 2,894 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 45 of the 45 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 1:9.0 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, Hodgdon LEVERevolution, IMR 3031 rank at the top here: for 6 x 52 R BB2 with the .243 | 85gr | Frontier PH HPBT 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.