Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 77gr | Lapua Open Tip bullet and 62 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 Ramshot Big Game.
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>> | 88% | 42,946 psi | 90% | 2484 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 41,887 psi | 88% | 2484 fps | 99.6% |
| Accurate 4064 | <<locked>> | 90% | 42,946 psi | 90% | 2516 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 40,799 psi | 85% | 2536 fps | 96% |
| ADI AR 2206H | <<locked>> | 84% | 42,351 psi | 88% | 2493 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 90% | 43,192 psi | 90% | 2490 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 41,916 psi | 88% | 2457 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 82% | 40,451 psi | 85% | 2454 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 40,915 psi | 85% | 2556 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 42,380 psi | 89% | 2513 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 88% | 42,859 psi | 90% | 2523 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 98% | 42,018 psi | 88% | 2552 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 94% | 41,858 psi | 87% | 2585 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 41,104 psi | 86% | 2484 fps | 96.1% |
| Bofors RP3 | <<locked>> | 90% | 41,698 psi | 87% | 2513 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 84% | 42,366 psi | 89% | 2516 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 90% | 43,207 psi | 90% | 2516 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 84% | 42,627 psi | 89% | 2503 fps | 98.2% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,770 psi | 85% | 2497 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 40,495 psi | 85% | 2513 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,519 psi | 72% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 41,060 psi | 86% | 2457 fps | 97.7% |
| IMR 3031 | <<locked>> | 84% | 41,350 psi | 86% | 2503 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 42,641 psi | 89% | 2474 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,438 psi | 89% | 2546 fps | 96.5% |
| IMR 4895 | <<locked>> | 86% | 41,220 psi | 86% | 2503 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 82% | 41,916 psi | 88% | 2457 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 84% | 40,335 psi | 84% | 2467 fps | 99.4% |
| Lovex S060 | <<locked>> | 84% | 43,120 psi | 90% | 2438 fps | 97.7% |
| Lovex S062 | <<locked>> | 88% | 42,337 psi | 88% | 2480 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 41,321 psi | 86% | 2448 fps | 98.5% |
| Norma 202 | <<locked>> | 84% | 41,191 psi | 86% | 2457 fps | 99.8% |
| Norma 203B | <<locked>> | 88% | 42,105 psi | 88% | 2510 fps | 97.6% |
| Norma URP | <<locked>> | 98% | 41,568 psi | 87% | 2539 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 88% | 41,568 psi | 87% | 2520 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 40,799 psi | 85% | 2470 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,809 psi | 73% | 1637 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 41,568 psi | 87% | 2559 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 41,989 psi | 88% | 2602 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 42,670 psi | 89% | 2448 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 86% | 41,611 psi | 87% | 2444 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 92% | 41,611 psi | 87% | 2503 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 40,335 psi | 84% | 2467 fps | 99.4% |
| Shooters World Precision | <<locked>> | 88% | 42,337 psi | 88% | 2480 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 43,163 psi | 90% | 2552 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 43,221 psi | 90% | 2503 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 40,683 psi | 85% | 2372 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 42,685 psi | 89% | 2415 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 42,525 psi | 89% | 2418 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 41,930 psi | 88% | 2470 fps | 97.4% |
| Somchem S355 | <<locked>> | 92% | 42,714 psi | 89% | 2510 fps | 98.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,523 psi | 83% | 2543 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 82% | 40,727 psi | 85% | 2372 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 43,134 psi | 90% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 41,785 psi | 87% | 2444 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 92% | 40,886 psi | 85% | 2451 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 82% | 41,539 psi | 87% | 2448 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 88% | 42,946 psi | 90% | 2484 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 98% | 42,888 psi | 90% | 2546 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 42,337 psi | 88% | 2487 fps | 98% |
| Winchester 748 | <<locked>> | 82% | 40,408 psi | 84% | 2484 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 86% | 42,583 psi | 89% | 2510 fps | 98.2% |
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% | 32,953 psi | 69% | 2303 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,262 psi | 82% | 2438 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 31,169 psi | 65% | 2283 fps | 98.5% |
| Accurate 4350 | <<locked>> | 96% | 38,101 psi | 80% | 2484 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 37,014 psi | 77% | 2385 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 38,159 psi | 80% | 2392 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,001 psi | 81% | 2402 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 80% | 37,753 psi | 79% | 2408 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 38,087 psi | 80% | 2493 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,489 psi | 68% | 2310 fps | 95.7% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,520 psi | 74% | 2375 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,566 psi | 83% | 2503 fps | 95.3% |
| Alliant Reloder-17 | 28.2 gr | 88% | 34,519 psi | 72% | 2421 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,682 psi | 81% | 2438 fps | 95.4% |
| Bofors RP3 | <<locked>> | 82% | 31,807 psi | 66% | 2306 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,970 psi | 77% | 2411 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 88% | 40,567 psi | 85% | 2467 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 37,231 psi | 78% | 2395 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,808 psi | 71% | 2349 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,301 psi | 70% | 2359 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,469 psi | 53% | 1424 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,187 psi | 76% | 2359 fps | 96.4% |
| IMR 3031 | <<locked>> | 80% | 36,143 psi | 76% | 2408 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,302 psi | 74% | 2326 fps | 95% |
| IMR 4831 | <<locked>> | 98% | 39,421 psi | 82% | 2490 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 33,750 psi | 71% | 2346 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 39,001 psi | 81% | 2402 fps | 97.9% |
| Lovex D073.6 | <<locked>> | 80% | 35,433 psi | 74% | 2372 fps | 98.6% |
| Lovex S060 | <<locked>> | 80% | 38,116 psi | 80% | 2343 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 32,938 psi | 69% | 2290 fps | 96.3% |
| Norma 201 | <<locked>> | 80% | 36,448 psi | 76% | 2349 fps | 97.4% |
| Norma 202 | <<locked>> | 80% | 36,260 psi | 76% | 2362 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 34,911 psi | 73% | 2365 fps | 95.5% |
| Norma URP | <<locked>> | 96% | 39,030 psi | 82% | 2490 fps | 95.1% |
| Ramshot Big Game | 27.3 gr | 84% | 36,434 psi | 76% | 2415 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,985 psi | 79% | 2415 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,817 psi | 54% | 1460 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 36,506 psi | 76% | 2457 fps | 95.3% |
| ReloadSwiss RS 60 | 25.6 gr | 80% | 28,297 psi | 59% | 2264 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 40,132 psi | 84% | 2402 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 34,853 psi | 73% | 2310 fps | 96.9% |
| Rottweil R 903 | <<locked>> | 84% | 32,082 psi | 67% | 2306 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,433 psi | 74% | 2372 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 32,938 psi | 69% | 2290 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,578 psi | 74% | 2402 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,592 psi | 74% | 2356 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,116 psi | 80% | 2323 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,212 psi | 65% | 2198 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 37,623 psi | 79% | 2329 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 36,637 psi | 77% | 2369 fps | 95.9% |
| Somchem S355 | <<locked>> | 84% | 33,228 psi | 69% | 2316 fps | 95.4% |
| Somchem S365 | <<locked>> | 92% | 30,821 psi | 64% | 2339 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 38,203 psi | 80% | 2329 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,446 psi | 70% | 2303 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,534 psi | 72% | 2310 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 29,660 psi | 62% | 2215 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 38,972 psi | 81% | 2398 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 33,170 psi | 69% | 2297 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 96% | 40,321 psi | 84% | 2497 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,751 psi | 73% | 2333 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 37,927 psi | 79% | 2438 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,925 psi | 73% | 2359 fps | 96.2% |
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 62 powders for 6 x 52 R BB2 loaded with the .243 | 77gr | Lapua Open Tip. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,598 fps to 2,602 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 62 of the 62 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 1:8.0 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, Ramshot Big Game rank at the top here: for 6 x 52 R BB2 with the .243 | 77gr | Lapua Open Tip 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.