Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 105gr | Barnes Match Burner BT 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% | 40,712 psi | 85% | 2451 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 42,351 psi | 88% | 2493 fps | 99.7% |
| Accurate 4064 | <<locked>> | 88% | 40,828 psi | 85% | 2484 fps | 99.9% |
| Accurate 4350 | <<locked>> | 98% | 41,669 psi | 87% | 2556 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 84% | 42,772 psi | 89% | 2503 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 88% | 41,031 psi | 86% | 2454 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 42,395 psi | 89% | 2470 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 82% | 41,075 psi | 86% | 2467 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 41,263 psi | 86% | 2569 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 42,772 psi | 89% | 2523 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 88% | 43,294 psi | 90% | 2533 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 98% | 42,322 psi | 88% | 2566 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 94% | 42,540 psi | 89% | 2602 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 41,872 psi | 87% | 2503 fps | 96.4% |
| Bofors RP3 | <<locked>> | 90% | 42,119 psi | 88% | 2523 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 84% | 43,221 psi | 90% | 2536 fps | 99.3% |
| Hodgdon H4895 | <<locked>> | 84% | 43,134 psi | 90% | 2516 fps | 98.3% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,104 psi | 86% | 2510 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 41,307 psi | 86% | 2533 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,476 psi | 72% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 41,524 psi | 87% | 2470 fps | 97.9% |
| IMR 3031 | <<locked>> | 84% | 41,916 psi | 88% | 2516 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 43,047 psi | 90% | 2484 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,786 psi | 89% | 2556 fps | 96.6% |
| IMR 4895 | <<locked>> | 86% | 41,684 psi | 87% | 2516 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 82% | 42,395 psi | 89% | 2470 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 84% | 41,249 psi | 86% | 2487 fps | 99.6% |
| Lovex S060 | <<locked>> | 82% | 41,002 psi | 86% | 2402 fps | 97.3% |
| Lovex S062 | <<locked>> | 88% | 42,772 psi | 89% | 2490 fps | 98.9% |
| Norma 201 | <<locked>> | 84% | 41,785 psi | 87% | 2461 fps | 98.6% |
| Norma 202 | <<locked>> | 84% | 42,090 psi | 88% | 2477 fps | 99.9% |
| Norma 203B | <<locked>> | 88% | 42,540 psi | 89% | 2523 fps | 97.8% |
| Norma URP | <<locked>> | 98% | 42,322 psi | 88% | 2559 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 88% | 42,351 psi | 88% | 2536 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 41,220 psi | 86% | 2484 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,766 psi | 73% | 1640 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 42,453 psi | 89% | 2582 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 42,293 psi | 88% | 2608 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 43,163 psi | 90% | 2461 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 86% | 42,061 psi | 88% | 2457 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 92% | 42,032 psi | 88% | 2513 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 41,249 psi | 86% | 2487 fps | 99.6% |
| Shooters World Precision | <<locked>> | 88% | 42,772 psi | 89% | 2490 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 40,944 psi | 86% | 2516 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 41,075 psi | 86% | 2470 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 41,176 psi | 86% | 2382 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 43,105 psi | 90% | 2425 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 42,989 psi | 90% | 2428 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 42,743 psi | 89% | 2490 fps | 97.6% |
| Somchem S355 | <<locked>> | 92% | 43,149 psi | 90% | 2520 fps | 98.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,205 psi | 84% | 2559 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 41,234 psi | 86% | 2385 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 41,379 psi | 86% | 2454 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 42,235 psi | 88% | 2457 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 41,292 psi | 86% | 2461 fps | 99% |
| Vihtavuori N160 | <<locked>> | 96% | 41,800 psi | 87% | 2510 fps | 96% |
| Vihtavuori N530 | <<locked>> | 82% | 42,018 psi | 88% | 2461 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 86% | 40,799 psi | 85% | 2451 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 42,525 psi | 89% | 2493 fps | 98.1% |
| Winchester 748 | <<locked>> | 82% | 40,901 psi | 85% | 2497 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 43,004 psi | 90% | 2523 fps | 98.3% |
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% | 33,460 psi | 70% | 2316 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,769 psi | 83% | 2448 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 31,662 psi | 66% | 2297 fps | 98.7% |
| Accurate 4350 | <<locked>> | 96% | 38,943 psi | 81% | 2503 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 37,478 psi | 78% | 2398 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 36,260 psi | 76% | 2356 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,465 psi | 82% | 2415 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 80% | 38,319 psi | 80% | 2421 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 38,812 psi | 81% | 2516 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,908 psi | 65% | 2274 fps | 95.1% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,940 psi | 75% | 2385 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,856 psi | 83% | 2513 fps | 95.6% |
| Alliant Reloder-17 | 28.5 gr | 88% | 34,795 psi | 73% | 2431 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,059 psi | 82% | 2448 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 30,269 psi | 63% | 2274 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,826 psi | 79% | 2431 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 80% | 37,710 psi | 79% | 2411 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,127 psi | 71% | 2362 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,663 psi | 70% | 2369 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 53% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,637 psi | 77% | 2375 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 36,680 psi | 77% | 2421 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,723 psi | 75% | 2339 fps | 95.2% |
| IMR 4831 | <<locked>> | 96% | 37,739 psi | 79% | 2461 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 34,156 psi | 71% | 2359 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 39,465 psi | 82% | 2415 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 35,882 psi | 75% | 2385 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 38,580 psi | 81% | 2356 fps | 96.7% |
| Lovex S062 | <<locked>> | 80% | 33,417 psi | 70% | 2303 fps | 96.6% |
| Norma 201 | <<locked>> | 80% | 36,883 psi | 77% | 2365 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 36,767 psi | 77% | 2375 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 35,331 psi | 74% | 2379 fps | 95.7% |
| Norma URP | <<locked>> | 96% | 39,755 psi | 83% | 2510 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 82% | 34,606 psi | 72% | 2379 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,392 psi | 80% | 2428 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,860 psi | 54% | 1467 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 36,985 psi | 77% | 2470 fps | 95.6% |
| ReloadSwiss RS 60 | 26 gr | 80% | 28,892 psi | 60% | 2287 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 40,625 psi | 85% | 2418 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 35,288 psi | 74% | 2323 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 32,547 psi | 68% | 2320 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,882 psi | 75% | 2385 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 33,417 psi | 70% | 2303 fps | 96.6% |
| SNPE Vectan SP 11 | 27.5 gr | 86% | 36,274 psi | 76% | 2421 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,998 psi | 75% | 2369 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,624 psi | 81% | 2336 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,647 psi | 66% | 2211 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 38,072 psi | 80% | 2343 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 37,043 psi | 77% | 2382 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 33,649 psi | 70% | 2329 fps | 95.7% |
| Somchem S365 | <<locked>> | 90% | 29,341 psi | 61% | 2303 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 38,696 psi | 81% | 2339 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,953 psi | 71% | 2316 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,954 psi | 73% | 2323 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 28,152 psi | 59% | 2182 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 94% | 39,276 psi | 82% | 2461 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 39,436 psi | 82% | 2411 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 80% | 33,605 psi | 70% | 2310 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 32,967 psi | 69% | 2293 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 38,363 psi | 80% | 2448 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,302 psi | 74% | 2372 fps | 96.4% |
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 | 105gr | Barnes Match Burner BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,608 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,608 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 105.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, Hodgdon TrailBoss, IMR 4831 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 | 105gr | Barnes Match Burner BT 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.