Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 105gr | Berger BT 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 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 41,220 psi | 86% | 2461 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 43,265 psi | 90% | 2513 fps | 99.8% |
| Accurate 4064 | <<locked>> | 88% | 41,307 psi | 86% | 2497 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 42,540 psi | 89% | 2575 fps | 96.6% |
| ADI AR 2206H | <<locked>> | 84% | 43,221 psi | 90% | 2516 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 88% | 41,394 psi | 86% | 2464 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 42,801 psi | 89% | 2484 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 82% | 41,655 psi | 87% | 2480 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 41,989 psi | 88% | 2589 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 43,192 psi | 90% | 2533 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 86% | 41,104 psi | 86% | 2497 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 98% | 42,989 psi | 90% | 2585 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 43,221 psi | 90% | 2621 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 42,235 psi | 88% | 2516 fps | 96.6% |
| Bofors RP3 | <<locked>> | 90% | 43,004 psi | 90% | 2543 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 82% | 40,654 psi | 85% | 2493 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 82% | 41,017 psi | 86% | 2480 fps | 98% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,785 psi | 87% | 2526 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 41,698 psi | 87% | 2543 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,418 psi | 72% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 41,901 psi | 88% | 2484 fps | 98.1% |
| IMR 3031 | <<locked>> | 84% | 42,482 psi | 89% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 40,915 psi | 85% | 2451 fps | 96.9% |
| IMR 4831 | <<locked>> | 98% | 40,901 psi | 85% | 2526 fps | 96.2% |
| IMR 4895 | <<locked>> | 86% | 42,090 psi | 88% | 2526 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 82% | 42,801 psi | 89% | 2484 fps | 98.8% |
| Lovex D073.6 | <<locked>> | 84% | 41,713 psi | 87% | 2500 fps | 99.7% |
| Lovex S060 | <<locked>> | 82% | 41,408 psi | 87% | 2418 fps | 97.5% |
| Lovex S062 | <<locked>> | 88% | 43,236 psi | 90% | 2503 fps | 99% |
| Norma 201 | <<locked>> | 84% | 42,235 psi | 88% | 2474 fps | 98.8% |
| Norma 202 | <<locked>> | 84% | 42,583 psi | 89% | 2490 fps | 99.9% |
| Norma 203B | <<locked>> | 88% | 42,960 psi | 90% | 2533 fps | 97.9% |
| Norma URP | <<locked>> | 98% | 42,598 psi | 89% | 2569 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 88% | 42,728 psi | 89% | 2549 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 41,626 psi | 87% | 2493 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,157 psi | 73% | 1650 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 42,902 psi | 90% | 2595 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 43,018 psi | 90% | 2628 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 42,177 psi | 88% | 2585 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 86% | 42,946 psi | 90% | 2477 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 92% | 42,917 psi | 90% | 2536 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 41,713 psi | 87% | 2500 fps | 99.7% |
| Shooters World Precision | <<locked>> | 88% | 43,236 psi | 90% | 2503 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 41,698 psi | 87% | 2536 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 41,887 psi | 88% | 2490 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 41,655 psi | 87% | 2398 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 41,321 psi | 86% | 2402 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 40,872 psi | 85% | 2395 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 43,105 psi | 90% | 2503 fps | 97.8% |
| Somchem S355 | <<locked>> | 90% | 41,350 psi | 86% | 2493 fps | 98% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,480 psi | 85% | 2569 fps | 99% |
| Vihtavuori N133 | <<locked>> | 82% | 41,698 psi | 87% | 2395 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 41,872 psi | 87% | 2464 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 42,670 psi | 89% | 2467 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 42,061 psi | 88% | 2480 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 96% | 42,525 psi | 89% | 2526 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 82% | 42,424 psi | 89% | 2474 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 86% | 41,191 psi | 86% | 2461 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 96% | 41,350 psi | 86% | 2526 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 43,062 psi | 90% | 2510 fps | 98.3% |
| Winchester 748 | <<locked>> | 82% | 41,756 psi | 87% | 2520 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 84% | 40,770 psi | 85% | 2487 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% | 33,982 psi | 71% | 2329 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,205 psi | 84% | 2461 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 32,155 psi | 67% | 2313 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 39,769 psi | 83% | 2523 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 37,913 psi | 79% | 2411 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 36,680 psi | 77% | 2369 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,900 psi | 83% | 2428 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 38,914 psi | 81% | 2434 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 39,146 psi | 82% | 2526 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,343 psi | 65% | 2290 fps | 95.4% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,390 psi | 76% | 2402 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,203 psi | 80% | 2484 fps | 95.1% |
| Alliant Reloder-17 | 28.2 gr | 86% | 33,040 psi | 69% | 2395 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,421 psi | 82% | 2461 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 30,661 psi | 64% | 2287 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,247 psi | 80% | 2444 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 80% | 38,145 psi | 80% | 2425 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,692 psi | 68% | 2333 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,403 psi | 72% | 2392 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,570 psi | 53% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,057 psi | 77% | 2388 fps | 96.9% |
| IMR 3031 | <<locked>> | 80% | 37,231 psi | 78% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,143 psi | 76% | 2352 fps | 95.5% |
| IMR 4831 | <<locked>> | 96% | 38,450 psi | 80% | 2480 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 34,650 psi | 72% | 2375 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 39,900 psi | 83% | 2428 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 80% | 36,361 psi | 76% | 2398 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 39,001 psi | 81% | 2369 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 33,808 psi | 71% | 2316 fps | 96.8% |
| Norma 201 | <<locked>> | 80% | 37,347 psi | 78% | 2379 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 37,246 psi | 78% | 2392 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 33,272 psi | 70% | 2336 fps | 95.1% |
| Norma URP | <<locked>> | 96% | 40,089 psi | 84% | 2520 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 82% | 34,954 psi | 73% | 2392 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,160 psi | 82% | 2448 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,918 psi | 54% | 1473 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,128 psi | 73% | 2434 fps | 95% |
| ReloadSwiss RS 60 | 26.3 gr | 80% | 29,167 psi | 61% | 2300 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 39,697 psi | 83% | 2536 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 35,360 psi | 74% | 2329 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 30,937 psi | 65% | 2287 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,361 psi | 76% | 2398 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 33,808 psi | 71% | 2316 fps | 96.8% |
| SNPE Vectan SP 11 | 27.2 gr | 84% | 34,505 psi | 72% | 2385 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,796 psi | 77% | 2388 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,088 psi | 82% | 2352 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,068 psi | 67% | 2224 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 38,522 psi | 80% | 2352 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,391 psi | 78% | 2392 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 31,995 psi | 67% | 2297 fps | 95.1% |
| Somchem S365 | <<locked>> | 90% | 29,602 psi | 62% | 2316 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 39,189 psi | 82% | 2352 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,432 psi | 72% | 2333 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,389 psi | 74% | 2336 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 28,558 psi | 60% | 2195 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 94% | 39,610 psi | 83% | 2474 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 39,885 psi | 83% | 2425 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 33,968 psi | 71% | 2320 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 38,943 psi | 81% | 2480 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,199 psi | 69% | 2306 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 38,798 psi | 81% | 2464 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,708 psi | 75% | 2385 fps | 96.6% |
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 | 105gr | Berger BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,628 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,628 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 1:9.0 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 | 105gr | Berger 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.