Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 90gr | Impala RNFP KO 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, Bofors RP3 and Alliant Reloder- TS 15.5.
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>> | 82% | 43,221 psi | 90% | 2615 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 41,046 psi | 86% | 2628 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 41,655 psi | 87% | 2654 fps | 98.7% |
| Accurate 4064 | <<locked>> | 90% | 43,279 psi | 90% | 2697 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 41,684 psi | 87% | 2648 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 41,307 psi | 86% | 2615 fps | 97% |
| Alliant AR-Comp | <<locked>> | 84% | 42,612 psi | 89% | 2684 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 41,278 psi | 86% | 2664 fps | 96.7% |
| Bofors RP3 | <<locked>> | 90% | 41,263 psi | 86% | 2674 fps | 96.8% |
| Hodgdon BL-C2 | <<locked>> | 84% | 41,742 psi | 87% | 2677 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 41,989 psi | 88% | 2661 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 42,569 psi | 89% | 2723 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,534 psi | 72% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 43,018 psi | 90% | 2667 fps | 96.7% |
| IMR 3031 | <<locked>> | 86% | 42,946 psi | 90% | 2720 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 43,236 psi | 90% | 2713 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 82% | 41,307 psi | 86% | 2615 fps | 97% |
| Lovex D073.6 | <<locked>> | 86% | 42,960 psi | 90% | 2690 fps | 98.9% |
| Lovex S060 | <<locked>> | 84% | 42,525 psi | 89% | 2592 fps | 96% |
| Lovex S062 | <<locked>> | 88% | 41,800 psi | 87% | 2638 fps | 97.3% |
| Norma 201 | <<locked>> | 84% | 41,292 psi | 86% | 2612 fps | 97.1% |
| Norma 202 | <<locked>> | 84% | 41,075 psi | 86% | 2631 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 42,627 psi | 89% | 2674 fps | 95.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,838 psi | 73% | 1772 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 41,408 psi | 87% | 2749 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 82% | 43,207 psi | 90% | 2628 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 86% | 41,901 psi | 88% | 2615 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 92% | 41,089 psi | 86% | 2661 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 42,960 psi | 90% | 2690 fps | 98.9% |
| Shooters World Precision | <<locked>> | 88% | 41,800 psi | 87% | 2638 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 42,540 psi | 89% | 2661 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 42,989 psi | 90% | 2582 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 42,148 psi | 88% | 2579 fps | 99.7% |
| Somchem S335 | <<locked>> | 84% | 42,279 psi | 88% | 2582 fps | 99.6% |
| Somchem S355 | <<locked>> | 92% | 42,206 psi | 88% | 2667 fps | 96.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,001 psi | 81% | 2687 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 84% | 42,772 psi | 89% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 42,743 psi | 89% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 41,350 psi | 86% | 2612 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 94% | 43,105 psi | 90% | 2661 fps | 98% |
| Vihtavuori N530 | <<locked>> | 82% | 41,394 psi | 86% | 2615 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 88% | 42,322 psi | 88% | 2648 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 41,553 psi | 87% | 2625 fps | 95.9% |
| Winchester 748 | <<locked>> | 84% | 42,627 psi | 89% | 2700 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 41,698 psi | 87% | 2664 fps | 96.4% |
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% | 40,843 psi | 85% | 2569 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,127 psi | 71% | 2484 fps | 99.6% |
| Accurate 2520 | <<locked>> | 80% | 38,957 psi | 81% | 2598 fps | 98.1% |
| Accurate 4064 | <<locked>> | 80% | 32,256 psi | 67% | 2457 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 82% | 39,465 psi | 82% | 2598 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,030 psi | 82% | 2569 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 80% | 37,318 psi | 78% | 2585 fps | 100% |
| Alliant Reloder- TS 15.5 | 26.7 gr | 86% | 36,767 psi | 77% | 2569 fps | 95.4% |
| Bofors RP3 | 27.4 gr | 86% | 36,361 psi | 76% | 2569 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,927 psi | 77% | 2575 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 80% | 37,507 psi | 78% | 2562 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 37,753 psi | 79% | 2618 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,889 psi | 54% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 38,029 psi | 79% | 2562 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 35,810 psi | 75% | 2572 fps | 99.4% |
| IMR 4895 | <<locked>> | 86% | 40,480 psi | 85% | 2657 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 39,030 psi | 82% | 2569 fps | 96.4% |
| Lovex D073.6 | <<locked>> | 80% | 35,389 psi | 74% | 2533 fps | 97.2% |
| Lovex S060 | <<locked>> | 82% | 40,219 psi | 84% | 2546 fps | 95.3% |
| Lovex S062 | <<locked>> | 82% | 35,244 psi | 74% | 2493 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 36,869 psi | 77% | 2516 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 36,274 psi | 76% | 2526 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 40,292 psi | 84% | 2628 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,266 psi | 55% | 1591 fps | 100% |
| ReloadSwiss RS 60 | 28.5 gr | 86% | 34,490 psi | 72% | 2579 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 40,901 psi | 85% | 2582 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 80% | 35,085 psi | 73% | 2464 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 88% | 36,593 psi | 76% | 2566 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,389 psi | 74% | 2533 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 35,244 psi | 74% | 2493 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 40,219 psi | 84% | 2615 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,232 psi | 80% | 2490 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,444 psi | 66% | 2356 fps | 97.7% |
| Somchem S335 | <<locked>> | 80% | 37,811 psi | 79% | 2493 fps | 99% |
| Somchem S355 | <<locked>> | 88% | 37,724 psi | 79% | 2575 fps | 95.1% |
| Somchem S365 | <<locked>> | 96% | 34,548 psi | 72% | 2579 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 38,058 psi | 80% | 2497 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 33,605 psi | 70% | 2474 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 34,447 psi | 72% | 2467 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 86% | 33,808 psi | 71% | 2464 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 38,638 psi | 81% | 2556 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 80% | 33,243 psi | 69% | 2451 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 39,044 psi | 82% | 2569 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 37,304 psi | 78% | 2592 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 39,436 psi | 82% | 2618 fps | 95.8% |
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 | 90gr | Impala RNFP KO. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,749 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,749 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 72–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:8.5 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, Bofors RP3, Alliant Reloder- TS 15.5 rank at the top here: for 6 x 52 R BB2 with the .243 | 90gr | Impala RNFP KO 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.