Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 100gr | Speer Grand Slam bullet and 60 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% | 41,452 psi | 87% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 42,917 psi | 90% | 2582 fps | 99.7% |
| Accurate 4064 | <<locked>> | 88% | 41,437 psi | 87% | 2569 fps | 99.9% |
| Accurate 4350 | <<locked>> | 98% | 42,511 psi | 89% | 2644 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 84% | 43,018 psi | 90% | 2585 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 88% | 41,539 psi | 87% | 2536 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 42,714 psi | 89% | 2552 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 82% | 41,640 psi | 87% | 2552 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 41,843 psi | 87% | 2657 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 43,192 psi | 90% | 2608 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 86% | 41,263 psi | 86% | 2572 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 98% | 43,062 psi | 90% | 2657 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 94% | 43,163 psi | 90% | 2690 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 42,148 psi | 88% | 2585 fps | 96.3% |
| Bofors RP3 | <<locked>> | 90% | 42,902 psi | 90% | 2615 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 82% | 40,727 psi | 85% | 2566 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 82% | 40,886 psi | 85% | 2549 fps | 97.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,785 psi | 87% | 2598 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 41,655 psi | 87% | 2615 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,737 psi | 73% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 42,163 psi | 88% | 2559 fps | 97.9% |
| IMR 3031 | <<locked>> | 84% | 42,380 psi | 89% | 2602 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 41,133 psi | 86% | 2523 fps | 96.7% |
| IMR 4831 | <<locked>> | 98% | 40,944 psi | 86% | 2598 fps | 95.9% |
| IMR 4895 | <<locked>> | 86% | 42,221 psi | 88% | 2602 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 82% | 42,714 psi | 89% | 2552 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 84% | 41,771 psi | 87% | 2572 fps | 99.5% |
| Lovex S060 | <<locked>> | 82% | 41,394 psi | 86% | 2487 fps | 97.2% |
| Lovex S062 | <<locked>> | 86% | 40,524 psi | 85% | 2526 fps | 98.3% |
| Norma 201 | <<locked>> | 84% | 42,134 psi | 88% | 2543 fps | 98.6% |
| Norma 202 | <<locked>> | 84% | 42,467 psi | 89% | 2559 fps | 99.8% |
| Norma 203B | <<locked>> | 88% | 43,004 psi | 90% | 2608 fps | 97.7% |
| Norma URP | <<locked>> | 98% | 43,062 psi | 90% | 2648 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 88% | 42,873 psi | 90% | 2625 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 41,626 psi | 87% | 2566 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,983 psi | 73% | 1706 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 42,859 psi | 90% | 2667 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 43,091 psi | 90% | 2703 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 86% | 42,801 psi | 89% | 2546 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 92% | 42,801 psi | 89% | 2605 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 41,771 psi | 87% | 2572 fps | 99.5% |
| Shooters World Precision | <<locked>> | 86% | 40,524 psi | 85% | 2526 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 41,887 psi | 88% | 2612 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 41,539 psi | 87% | 2556 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 41,321 psi | 86% | 2464 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 41,176 psi | 86% | 2467 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 40,872 psi | 85% | 2467 fps | 99.9% |
| Somchem S341 | <<locked>> | 84% | 43,018 psi | 90% | 2569 fps | 97.5% |
| Somchem S355 | <<locked>> | 90% | 41,379 psi | 86% | 2566 fps | 97.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,814 psi | 85% | 2648 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 41,394 psi | 86% | 2464 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 41,785 psi | 87% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 42,844 psi | 90% | 2543 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 92% | 41,959 psi | 88% | 2549 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 96% | 42,134 psi | 88% | 2592 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 82% | 42,757 psi | 89% | 2549 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 86% | 41,249 psi | 86% | 2533 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 43,221 psi | 90% | 2582 fps | 98.2% |
| Winchester 748 | <<locked>> | 82% | 41,437 psi | 87% | 2582 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 84% | 40,799 psi | 85% | 2559 fps | 97.7% |
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% | 34,055 psi | 71% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,408 psi | 84% | 2536 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 32,213 psi | 67% | 2379 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 39,392 psi | 82% | 2585 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 37,927 psi | 79% | 2480 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 36,593 psi | 76% | 2438 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,914 psi | 83% | 2500 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 39,044 psi | 82% | 2510 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 39,073 psi | 82% | 2595 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,357 psi | 66% | 2356 fps | 95% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,274 psi | 76% | 2467 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 40,292 psi | 84% | 2598 fps | 95.5% |
| Alliant Reloder-17 | 30 gr | 88% | 35,288 psi | 74% | 2516 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,392 psi | 82% | 2530 fps | 95.5% |
| Bofors RP3 | <<locked>> | 82% | 32,909 psi | 69% | 2405 fps | 95.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,985 psi | 79% | 2510 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 80% | 38,159 psi | 80% | 2493 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,635 psi | 72% | 2448 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,258 psi | 72% | 2454 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,773 psi | 54% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,072 psi | 77% | 2457 fps | 96.6% |
| IMR 3031 | <<locked>> | 80% | 37,347 psi | 78% | 2510 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,172 psi | 76% | 2421 fps | 95.1% |
| IMR 4831 | <<locked>> | 96% | 38,130 psi | 80% | 2539 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 34,606 psi | 72% | 2441 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 39,914 psi | 83% | 2500 fps | 98% |
| Lovex D073.6 | <<locked>> | 80% | 36,274 psi | 76% | 2464 fps | 98.7% |
| Lovex S060 | <<locked>> | 80% | 38,711 psi | 81% | 2434 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 33,576 psi | 70% | 2375 fps | 96.4% |
| Norma 201 | <<locked>> | 80% | 37,463 psi | 78% | 2448 fps | 97.5% |
| Norma 202 | <<locked>> | 80% | 37,289 psi | 78% | 2461 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 35,665 psi | 75% | 2457 fps | 95.6% |
| Norma URP | <<locked>> | 96% | 40,176 psi | 84% | 2592 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 82% | 35,012 psi | 73% | 2457 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,914 psi | 81% | 2513 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,730 psi | 54% | 1519 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 37,565 psi | 78% | 2556 fps | 95.5% |
| ReloadSwiss RS 60 | 27.3 gr | 80% | 29,066 psi | 61% | 2359 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 35,505 psi | 74% | 2398 fps | 97% |
| Rottweil R 903 | <<locked>> | 84% | 32,822 psi | 69% | 2395 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,274 psi | 76% | 2464 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 33,576 psi | 70% | 2375 fps | 96.4% |
| SNPE Vectan SP 11 | 28.9 gr | 86% | 36,593 psi | 76% | 2500 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,637 psi | 77% | 2454 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,899 psi | 81% | 2418 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,908 psi | 67% | 2283 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 38,580 psi | 81% | 2425 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 37,536 psi | 78% | 2464 fps | 96% |
| Somchem S355 | <<locked>> | 84% | 33,953 psi | 71% | 2408 fps | 95.6% |
| Somchem S365 | <<locked>> | 92% | 31,618 psi | 66% | 2434 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 80% | 38,972 psi | 81% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,272 psi | 72% | 2395 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,447 psi | 74% | 2405 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 28,587 psi | 60% | 2257 fps | 95% |
| Vihtavuori N160 | <<locked>> | 94% | 39,726 psi | 83% | 2543 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 39,842 psi | 83% | 2493 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 80% | 33,910 psi | 71% | 2385 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,491 psi | 74% | 2421 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 39,030 psi | 82% | 2536 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,882 psi | 75% | 2457 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 60 powders for 6 x 52 R BB2 loaded with the .243 | 100gr | Speer Grand Slam. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,703 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,703 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 60 of the 60 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 1:10.5 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, SNPE Vectan SP 11 rank at the top here: for 6 x 52 R BB2 with the .243 | 100gr | Speer Grand Slam 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.