Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 115gr | Barnes RNSP bullet and 51 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 ReloadSwiss RS 62.
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>> | 82% | 40,712 psi | 85% | 2346 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 40,843 psi | 85% | 2382 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,003 psi | 88% | 2467 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 86% | 42,714 psi | 89% | 2398 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 43,004 psi | 90% | 2520 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,337 psi | 88% | 2421 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,772 psi | 89% | 2431 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,872 psi | 87% | 2477 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,771 psi | 87% | 2503 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,650 psi | 74% | 2379 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,392 psi | 82% | 2510 fps | 96.4% |
| Bofors RP3 | <<locked>> | 86% | 41,872 psi | 87% | 2425 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 42,946 psi | 90% | 2428 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 40,814 psi | 85% | 2418 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,509 psi | 85% | 2425 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,230 psi | 74% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 43,308 psi | 90% | 2411 fps | 99.2% |
| IMR 4064 | <<locked>> | 84% | 42,279 psi | 88% | 2382 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 42,946 psi | 90% | 2467 fps | 98% |
| IMR 4895 | <<locked>> | 82% | 40,872 psi | 85% | 2408 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 82% | 43,192 psi | 90% | 2421 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 42,250 psi | 88% | 2388 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 41,510 psi | 87% | 2375 fps | 96% |
| Norma 203B | <<locked>> | 84% | 42,090 psi | 88% | 2421 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 42,235 psi | 88% | 2467 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 84% | 41,437 psi | 87% | 2431 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 74% | 1591 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,829 psi | 87% | 2474 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,568 psi | 87% | 2507 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,553 psi | 87% | 2484 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,409 psi | 89% | 2500 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 41,452 psi | 87% | 2352 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 88% | 42,192 psi | 88% | 2421 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,510 psi | 87% | 2375 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 82% | 43,192 psi | 90% | 2421 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 42,250 psi | 88% | 2388 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,466 psi | 85% | 2418 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,960 psi | 90% | 2415 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,206 psi | 88% | 2316 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 43,062 psi | 90% | 2425 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 42,699 psi | 89% | 2516 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 84% | 43,308 psi | 90% | 2379 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,655 psi | 87% | 2352 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,162 psi | 86% | 2365 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 41,205 psi | 86% | 2411 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 42,685 psi | 89% | 2385 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 43,134 psi | 90% | 2464 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,406 psi | 80% | 2451 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,742 psi | 87% | 2402 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,024 psi | 67% | 2362 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,424 psi | 89% | 2421 fps | 99.1% |
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% | 38,247 psi | 80% | 2303 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,172 psi | 76% | 2297 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,243 psi | 72% | 2320 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 35,723 psi | 75% | 2260 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,840 psi | 79% | 2411 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,983 psi | 73% | 2277 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,579 psi | 79% | 2333 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,780 psi | 73% | 2326 fps | 95.5% |
| Alliant Reloder-17 | 26.9 gr | 80% | 30,269 psi | 63% | 2241 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,792 psi | 66% | 2283 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,695 psi | 77% | 2448 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 34,432 psi | 72% | 2280 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 80% | 35,462 psi | 74% | 2283 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,878 psi | 62% | 2185 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,797 psi | 79% | 2372 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,049 psi | 54% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,393 psi | 84% | 2359 fps | 98.7% |
| IMR 4064 | <<locked>> | 80% | 37,478 psi | 78% | 2290 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 33,257 psi | 69% | 2277 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 38,421 psi | 80% | 2362 fps | 98% |
| Lovex D073.6 | <<locked>> | 80% | 40,611 psi | 85% | 2379 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 37,101 psi | 78% | 2293 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 39,146 psi | 82% | 2333 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 36,970 psi | 77% | 2323 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 34,853 psi | 73% | 2323 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 36,419 psi | 76% | 2333 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,469 psi | 55% | 1421 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,885 psi | 81% | 2418 fps | 97.6% |
| ReloadSwiss RS 60 | 26.9 gr | 80% | 32,198 psi | 67% | 2303 fps | 98.7% |
| ReloadSwiss RS 62 | 30.2 gr | 90% | 36,448 psi | 76% | 2382 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,624 psi | 83% | 2444 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 39,073 psi | 82% | 2310 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 32,256 psi | 67% | 2228 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,146 psi | 82% | 2333 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,611 psi | 85% | 2379 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,101 psi | 78% | 2293 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,199 psi | 69% | 2267 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,118 psi | 84% | 2362 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,085 psi | 73% | 2195 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,533 psi | 70% | 2241 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 27,253 psi | 57% | 2169 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 38,189 psi | 80% | 2297 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,812 psi | 81% | 2303 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,531 psi | 66% | 2178 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 88% | 36,492 psi | 76% | 2323 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 37,594 psi | 79% | 2297 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,752 psi | 75% | 2323 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 31,633 psi | 66% | 2300 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,008 psi | 63% | 2152 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,950 psi | 63% | 2300 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,566 psi | 83% | 2369 fps | 98.7% |
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 51 powders for 6 x 52 R BB2 loaded with the .243 | 115gr | Barnes RNSP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,520 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 67–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.243" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon TrailBoss 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, ReloadSwiss RS 62 rank at the top here: for 6 x 52 R BB2 with the .243 | 115gr | Barnes RNSP 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.