Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 100gr | Sierra SBT GameKing bullet and 61 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and SNPE Vectan SP 11.
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 2495 | <<locked>> | 86% | 41,713 psi | 87% | 2543 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 43,163 psi | 90% | 2589 fps | 99.7% |
| Accurate 4064 | <<locked>> | 88% | 41,640 psi | 87% | 2575 fps | 99.9% |
| Accurate 4350 | <<locked>> | 98% | 42,670 psi | 89% | 2651 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 84% | 43,221 psi | 90% | 2592 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 88% | 41,742 psi | 87% | 2543 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 42,917 psi | 90% | 2559 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 82% | 41,945 psi | 88% | 2559 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 42,061 psi | 88% | 2664 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 40,930 psi | 86% | 2566 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 86% | 41,452 psi | 87% | 2579 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 43,265 psi | 90% | 2664 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 92% | 40,509 psi | 85% | 2641 fps | 97.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 42,322 psi | 88% | 2589 fps | 96.4% |
| Bofors RP3 | <<locked>> | 90% | 43,091 psi | 90% | 2618 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 82% | 40,944 psi | 86% | 2569 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 82% | 41,075 psi | 86% | 2556 fps | 97.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,003 psi | 88% | 2602 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 41,829 psi | 87% | 2621 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 72% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 41,930 psi | 88% | 2556 fps | 97.9% |
| IMR 3031 | <<locked>> | 84% | 42,670 psi | 89% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 40,959 psi | 86% | 2523 fps | 96.7% |
| IMR 4831 | <<locked>> | 98% | 41,089 psi | 86% | 2602 fps | 96% |
| IMR 4895 | <<locked>> | 86% | 42,424 psi | 89% | 2608 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 82% | 42,917 psi | 90% | 2559 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 84% | 41,989 psi | 88% | 2579 fps | 99.6% |
| Lovex S060 | <<locked>> | 82% | 41,220 psi | 86% | 2484 fps | 97.2% |
| Lovex S062 | <<locked>> | 88% | 43,163 psi | 90% | 2575 fps | 98.8% |
| Norma 201 | <<locked>> | 84% | 42,322 psi | 88% | 2549 fps | 98.6% |
| Norma 202 | <<locked>> | 84% | 42,656 psi | 89% | 2566 fps | 99.9% |
| Norma 203B | <<locked>> | 88% | 43,207 psi | 90% | 2615 fps | 97.8% |
| Norma URP | <<locked>> | 98% | 42,830 psi | 89% | 2644 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 88% | 43,033 psi | 90% | 2628 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 41,872 psi | 87% | 2572 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,867 psi | 73% | 1706 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 43,134 psi | 90% | 2674 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 43,221 psi | 90% | 2710 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 42,554 psi | 89% | 2667 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 86% | 43,018 psi | 90% | 2552 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 92% | 43,004 psi | 90% | 2608 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 41,989 psi | 88% | 2579 fps | 99.6% |
| Shooters World Precision | <<locked>> | 88% | 43,163 psi | 90% | 2575 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 41,684 psi | 87% | 2608 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 41,727 psi | 87% | 2559 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 41,568 psi | 87% | 2467 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 41,336 psi | 86% | 2474 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 41,104 psi | 86% | 2474 fps | 99.9% |
| Somchem S341 | <<locked>> | 84% | 43,192 psi | 90% | 2575 fps | 97.6% |
| Somchem S355 | <<locked>> | 90% | 41,162 psi | 86% | 2562 fps | 97.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,930 psi | 86% | 2654 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 41,626 psi | 87% | 2467 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 41,597 psi | 87% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 43,047 psi | 90% | 2549 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 42,177 psi | 88% | 2552 fps | 99% |
| Vihtavuori N160 | <<locked>> | 96% | 42,351 psi | 88% | 2598 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 82% | 42,960 psi | 90% | 2556 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 86% | 41,423 psi | 87% | 2536 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 40,611 psi | 85% | 2533 fps | 97.6% |
| Winchester 748 | <<locked>> | 82% | 41,669 psi | 87% | 2589 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 84% | 41,017 psi | 86% | 2566 fps | 97.8% |
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 2495 | <<locked>> | 80% | 33,910 psi | 71% | 2395 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,234 psi | 84% | 2536 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 32,097 psi | 67% | 2379 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 39,639 psi | 83% | 2592 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 38,101 psi | 80% | 2487 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 36,782 psi | 77% | 2441 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,103 psi | 84% | 2507 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 80% | 39,276 psi | 82% | 2516 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 39,291 psi | 82% | 2602 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,560 psi | 66% | 2362 fps | 95.2% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,506 psi | 76% | 2474 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 96% | 40,466 psi | 85% | 2605 fps | 95.6% |
| Alliant Reloder-17 | 30.1 gr | 88% | 35,418 psi | 74% | 2523 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,610 psi | 83% | 2536 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 30,806 psi | 64% | 2356 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,203 psi | 80% | 2516 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,392 psi | 80% | 2500 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,838 psi | 73% | 2451 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,447 psi | 72% | 2464 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,701 psi | 54% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,912 psi | 77% | 2454 fps | 96.5% |
| IMR 3031 | <<locked>> | 80% | 37,159 psi | 78% | 2507 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,376 psi | 76% | 2428 fps | 95.2% |
| IMR 4831 | <<locked>> | 96% | 38,334 psi | 80% | 2546 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 34,838 psi | 73% | 2448 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 40,103 psi | 84% | 2507 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 36,463 psi | 76% | 2470 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 38,914 psi | 81% | 2438 fps | 96.6% |
| Lovex S062 | <<locked>> | 80% | 33,765 psi | 71% | 2385 fps | 96.5% |
| Norma 201 | <<locked>> | 80% | 37,275 psi | 78% | 2448 fps | 97.5% |
| Norma 202 | <<locked>> | 80% | 37,478 psi | 78% | 2467 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 35,839 psi | 75% | 2464 fps | 95.7% |
| Norma URP | <<locked>> | 96% | 40,379 psi | 84% | 2598 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 82% | 35,172 psi | 73% | 2464 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,102 psi | 82% | 2516 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 54% | 1529 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 37,391 psi | 78% | 2556 fps | 95.5% |
| ReloadSwiss RS 60 | 27.4 gr | 80% | 29,211 psi | 61% | 2362 fps | 95.5% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 39,711 psi | 83% | 2608 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 35,708 psi | 75% | 2405 fps | 97% |
| Rottweil R 903 | <<locked>> | 84% | 32,996 psi | 69% | 2402 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,463 psi | 76% | 2470 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 33,765 psi | 71% | 2385 fps | 96.5% |
| SNPE Vectan SP 11 | 29 gr | 86% | 36,782 psi | 77% | 2507 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,854 psi | 77% | 2461 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,131 psi | 82% | 2421 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,097 psi | 67% | 2290 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 38,406 psi | 80% | 2421 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 37,724 psi | 79% | 2470 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 34,156 psi | 71% | 2411 fps | 95.7% |
| Somchem S365 | <<locked>> | 90% | 29,718 psi | 62% | 2382 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 39,204 psi | 82% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,490 psi | 72% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,288 psi | 74% | 2402 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 82% | 30,530 psi | 64% | 2310 fps | 95.9% |
| Vihtavuori N160 | <<locked>> | 94% | 39,871 psi | 83% | 2549 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 40,074 psi | 84% | 2500 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 80% | 34,098 psi | 71% | 2388 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,417 psi | 70% | 2375 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 38,856 psi | 81% | 2536 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,708 psi | 75% | 2454 fps | 96.3% |
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 61 powders for 6 x 52 R BB2 loaded with the .243 | 100gr | Sierra SBT GameKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,710 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,710 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 61 of the 61 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 100.0 gr projectile in 0.243" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, 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, Alliant Reloder-17, SNPE Vectan SP 11 rank at the top here: for 6 x 52 R BB2 with the .243 | 100gr | Sierra SBT GameKing 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.