Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 95gr | Sierra MatchKing bullet and 55 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 Bofors RP3.
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% | 40,915 psi | 85% | 2530 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 42,931 psi | 90% | 2621 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 42,424 psi | 89% | 2625 fps | 99.2% |
| Accurate 4064 | <<locked>> | 92% | 42,844 psi | 90% | 2648 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 42,714 psi | 89% | 2625 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 42,032 psi | 88% | 2585 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 84% | 40,799 psi | 85% | 2602 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 42,424 psi | 89% | 2641 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 90% | 43,004 psi | 90% | 2651 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 42,511 psi | 89% | 2717 fps | 97% |
| Bofors RP3 | <<locked>> | 92% | 41,568 psi | 87% | 2638 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 41,771 psi | 87% | 2539 fps | 98.2% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,844 psi | 90% | 2654 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 86% | 43,047 psi | 90% | 2638 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 40,944 psi | 86% | 2648 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,330 psi | 72% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 41,553 psi | 87% | 2592 fps | 96.9% |
| IMR 3031 | <<locked>> | 86% | 41,191 psi | 86% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 43,091 psi | 90% | 2605 fps | 96.3% |
| IMR 4895 | <<locked>> | 88% | 41,423 psi | 87% | 2635 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 84% | 42,032 psi | 88% | 2585 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 86% | 40,785 psi | 85% | 2605 fps | 99% |
| Lovex S060 | <<locked>> | 84% | 40,930 psi | 86% | 2520 fps | 96.2% |
| Lovex S062 | <<locked>> | 90% | 42,192 psi | 88% | 2605 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 41,800 psi | 87% | 2582 fps | 97.8% |
| Norma 202 | <<locked>> | 86% | 41,611 psi | 87% | 2595 fps | 99.5% |
| Norma 203B | <<locked>> | 90% | 42,192 psi | 88% | 2641 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 90% | 41,945 psi | 88% | 2648 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 84% | 40,988 psi | 86% | 2598 fps | 96.2% |
| Ramshot X-Terminator | <<locked>> | 82% | 42,931 psi | 90% | 2579 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,505 psi | 72% | 1729 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 42,322 psi | 88% | 2726 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 42,946 psi | 90% | 2585 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 88% | 42,032 psi | 88% | 2579 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 94% | 41,466 psi | 87% | 2628 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 40,785 psi | 85% | 2605 fps | 99% |
| Shooters World Precision | <<locked>> | 90% | 42,192 psi | 88% | 2605 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 40,973 psi | 86% | 2635 fps | 96.1% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 40,915 psi | 85% | 2585 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 41,104 psi | 86% | 2503 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 43,178 psi | 90% | 2549 fps | 99.9% |
| Somchem S321 | <<locked>> | 82% | 42,554 psi | 89% | 2615 fps | 98.2% |
| Somchem S335 | <<locked>> | 86% | 43,062 psi | 90% | 2556 fps | 99.9% |
| Somchem S341 | <<locked>> | 86% | 42,395 psi | 89% | 2602 fps | 96.5% |
| Somchem S355 | <<locked>> | 94% | 42,743 psi | 89% | 2635 fps | 97.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,231 psi | 78% | 2608 fps | 97% |
| Vihtavuori N133 | <<locked>> | 84% | 41,060 psi | 86% | 2507 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 40,698 psi | 85% | 2575 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 42,061 psi | 88% | 2579 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 94% | 40,886 psi | 85% | 2575 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 84% | 42,090 psi | 88% | 2582 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 90% | 43,062 psi | 90% | 2615 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 42,917 psi | 90% | 2612 fps | 97.1% |
| Winchester 748 | <<locked>> | 84% | 41,002 psi | 86% | 2625 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 43,018 psi | 90% | 2648 fps | 97.4% |
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% | 38,421 psi | 80% | 2484 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 30,676 psi | 64% | 2375 fps | 99.4% |
| Accurate 2520 | <<locked>> | 80% | 36,622 psi | 77% | 2510 fps | 98.1% |
| Accurate 4064 | <<locked>> | 80% | 29,051 psi | 61% | 2349 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 82% | 37,507 psi | 78% | 2516 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,231 psi | 78% | 2490 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 80% | 35,723 psi | 75% | 2507 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,824 psi | 73% | 2484 fps | 95.4% |
| Alliant Reloder-15 | <<locked>> | 88% | 40,495 psi | 85% | 2602 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 92% | 36,956 psi | 77% | 2592 fps | 95% |
| Bofors RP3 | 27.2 gr | 86% | 33,997 psi | 71% | 2477 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,378 psi | 82% | 2493 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,911 psi | 73% | 2490 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 80% | 35,447 psi | 74% | 2480 fps | 95.1% |
| Hodgdon LEVERevolution | 27.5 gr | 84% | 35,940 psi | 75% | 2536 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,121 psi | 52% | 1503 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,376 psi | 76% | 2484 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 33,837 psi | 71% | 2487 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 40,480 psi | 85% | 2552 fps | 95.5% |
| IMR 4895 | <<locked>> | 86% | 38,899 psi | 81% | 2582 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 37,231 psi | 78% | 2490 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 80% | 33,025 psi | 69% | 2441 fps | 97.1% |
| Lovex S060 | <<locked>> | 82% | 38,537 psi | 81% | 2470 fps | 95.5% |
| Lovex S062 | <<locked>> | 82% | 32,982 psi | 69% | 2408 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 34,418 psi | 72% | 2425 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 34,548 psi | 72% | 2451 fps | 98.2% |
| Norma 203B | <<locked>> | 86% | 37,347 psi | 78% | 2539 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 88% | 39,523 psi | 83% | 2598 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 38,609 psi | 81% | 2549 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,509 psi | 85% | 2533 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,396 psi | 53% | 1542 fps | 100% |
| ReloadSwiss RS 60 | 28.3 gr | 86% | 32,692 psi | 68% | 2497 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 38,014 psi | 79% | 2487 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 80% | 32,909 psi | 69% | 2382 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 88% | 34,287 psi | 72% | 2477 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,025 psi | 69% | 2441 fps | 97.1% |
| Shooters World Precision | <<locked>> | 82% | 32,982 psi | 69% | 2408 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 38,232 psi | 80% | 2579 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 38,522 psi | 80% | 2539 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,260 psi | 76% | 2408 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,544 psi | 62% | 2274 fps | 97.7% |
| Somchem S321 | <<locked>> | 80% | 39,682 psi | 83% | 2559 fps | 97.5% |
| Somchem S335 | <<locked>> | 80% | 35,607 psi | 74% | 2411 fps | 99% |
| Somchem S341 | <<locked>> | 84% | 39,508 psi | 83% | 2546 fps | 95.6% |
| Somchem S355 | <<locked>> | 88% | 35,563 psi | 74% | 2487 fps | 95.1% |
| Somchem S365 | <<locked>> | 96% | 32,663 psi | 68% | 2497 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 36,245 psi | 76% | 2418 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 31,343 psi | 65% | 2382 fps | 99.4% |
| Vihtavuori N140 | <<locked>> | 80% | 32,474 psi | 68% | 2385 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 86% | 31,807 psi | 66% | 2382 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 36,753 psi | 77% | 2477 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 80% | 31,154 psi | 65% | 2365 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 37,463 psi | 78% | 2500 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 35,491 psi | 74% | 2507 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 82% | 35,099 psi | 73% | 2484 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 55 powders for 6 x 52 R BB2 loaded with the .243 | 95gr | Sierra MatchKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,726 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 55 of the 55 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 95.0 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, Hodgdon LEVERevolution, Bofors RP3 rank at the top here: for 6 x 52 R BB2 with the .243 | 95gr | Sierra MatchKing 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.