Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 100gr | Sierra SP SemiSp bullet and 56 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 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 2495 | <<locked>> | 86% | 42,221 psi | 88% | 2556 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 42,569 psi | 89% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 40,857 psi | 85% | 2621 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 41,278 psi | 86% | 2559 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 88% | 42,525 psi | 89% | 2566 fps | 96.9% |
| Alliant AR-Comp | <<locked>> | 82% | 42,583 psi | 89% | 2572 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 42,743 psi | 89% | 2684 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 41,350 psi | 86% | 2579 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 86% | 42,308 psi | 88% | 2598 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 41,089 psi | 86% | 2628 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 92% | 41,118 psi | 86% | 2661 fps | 97.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 43,105 psi | 90% | 2612 fps | 96.7% |
| Bofors RP3 | <<locked>> | 88% | 41,002 psi | 86% | 2585 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 41,742 psi | 87% | 2592 fps | 99% |
| Hodgdon H4895 | <<locked>> | 82% | 41,568 psi | 87% | 2572 fps | 98% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,670 psi | 89% | 2621 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 42,627 psi | 89% | 2641 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,780 psi | 73% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 42,801 psi | 89% | 2579 fps | 98.1% |
| IMR 3031 | <<locked>> | 84% | 43,236 psi | 90% | 2621 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 41,771 psi | 87% | 2546 fps | 97% |
| IMR 4831 | <<locked>> | 98% | 41,800 psi | 87% | 2621 fps | 96.3% |
| IMR 4895 | <<locked>> | 86% | 43,265 psi | 90% | 2628 fps | 97.9% |
| Lovex D073.6 | <<locked>> | 84% | 42,511 psi | 89% | 2592 fps | 99.7% |
| Lovex S060 | <<locked>> | 82% | 42,018 psi | 88% | 2507 fps | 97.5% |
| Lovex S062 | <<locked>> | 86% | 41,539 psi | 87% | 2552 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 43,236 psi | 90% | 2569 fps | 98.9% |
| Norma 202 | <<locked>> | 84% | 43,134 psi | 90% | 2579 fps | 99.9% |
| Norma 203B | <<locked>> | 86% | 41,553 psi | 87% | 2585 fps | 97.5% |
| Norma URP | <<locked>> | 96% | 41,075 psi | 86% | 2618 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 86% | 40,959 psi | 86% | 2595 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 42,656 psi | 89% | 2592 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,012 psi | 73% | 1716 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 41,017 psi | 86% | 2638 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 41,046 psi | 86% | 2671 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 41,060 psi | 86% | 2520 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 90% | 41,278 psi | 86% | 2582 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 42,511 psi | 89% | 2592 fps | 99.7% |
| Shooters World Precision | <<locked>> | 86% | 41,539 psi | 87% | 2552 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 42,801 psi | 89% | 2638 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 42,554 psi | 89% | 2582 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 42,032 psi | 88% | 2484 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 41,785 psi | 87% | 2487 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 41,553 psi | 87% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 41,147 psi | 86% | 2543 fps | 97.2% |
| Somchem S355 | <<locked>> | 90% | 42,003 psi | 88% | 2582 fps | 98% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,611 psi | 87% | 2671 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 82% | 42,177 psi | 88% | 2484 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 42,583 psi | 89% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 41,031 psi | 86% | 2520 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 92% | 42,946 psi | 90% | 2572 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 86% | 42,192 psi | 88% | 2556 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 96% | 42,598 psi | 89% | 2625 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 41,452 psi | 87% | 2556 fps | 97.9% |
| Winchester 748 | <<locked>> | 82% | 42,540 psi | 89% | 2612 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 84% | 41,771 psi | 87% | 2582 fps | 98% |
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% | 34,809 psi | 73% | 2418 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,938 psi | 69% | 2402 fps | 98.9% |
| Accurate 4350 | <<locked>> | 94% | 37,913 psi | 79% | 2562 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 38,957 psi | 81% | 2510 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 37,565 psi | 78% | 2464 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 39,943 psi | 83% | 2530 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 39,987 psi | 84% | 2625 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,053 psi | 67% | 2379 fps | 95.5% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,941 psi | 77% | 2487 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,827 psi | 81% | 2575 fps | 95.2% |
| Alliant Reloder-17 | 29.9 gr | 86% | 33,721 psi | 70% | 2484 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,753 psi | 79% | 2503 fps | 95.1% |
| Bofors RP3 | 26.8 gr | 80% | 31,285 psi | 65% | 2372 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,030 psi | 82% | 2536 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 80% | 39,233 psi | 82% | 2523 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,127 psi | 69% | 2418 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,838 psi | 73% | 2477 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,585 psi | 53% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,739 psi | 79% | 2477 fps | 96.9% |
| IMR 3031 | <<locked>> | 80% | 38,203 psi | 80% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,811 psi | 77% | 2444 fps | 95.5% |
| IMR 4831 | <<locked>> | 96% | 39,407 psi | 82% | 2572 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 35,650 psi | 74% | 2470 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 80% | 37,362 psi | 78% | 2493 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 39,349 psi | 82% | 2454 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 34,243 psi | 72% | 2398 fps | 96.8% |
| Norma 201 | <<locked>> | 80% | 38,145 psi | 80% | 2470 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 37,985 psi | 79% | 2480 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 34,243 psi | 72% | 2431 fps | 95.2% |
| Norma URP | <<locked>> | 94% | 38,740 psi | 81% | 2569 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 82% | 35,882 psi | 75% | 2487 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,914 psi | 83% | 2539 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,918 psi | 54% | 1532 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,694 psi | 75% | 2523 fps | 95% |
| ReloadSwiss RS 60 | 27.9 gr | 80% | 29,805 psi | 62% | 2388 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 36,201 psi | 76% | 2421 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 31,517 psi | 66% | 2372 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,362 psi | 78% | 2493 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 34,243 psi | 72% | 2398 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,070 psi | 73% | 2474 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,260 psi | 78% | 2474 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,624 psi | 83% | 2438 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,576 psi | 68% | 2306 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 39,262 psi | 82% | 2444 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 38,435 psi | 80% | 2490 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 32,634 psi | 68% | 2382 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 30,313 psi | 63% | 2405 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 39,755 psi | 83% | 2441 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,041 psi | 73% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,100 psi | 75% | 2421 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 29,153 psi | 61% | 2277 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 34,534 psi | 72% | 2405 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 39,827 psi | 83% | 2572 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,881 psi | 71% | 2395 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 39,711 psi | 83% | 2556 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,477 psi | 76% | 2477 fps | 96.7% |
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 56 powders for 6 x 52 R BB2 loaded with the .243 | 100gr | Sierra SP SemiSp. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,684 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:11.5 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, Bofors RP3 rank at the top here: for 6 x 52 R BB2 with the .243 | 100gr | Sierra SP SemiSp 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.