Load Specifications
Load data in caliber 6 x 52 R Bretschneider with .243 | 90gr | Berger BT M T bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Accurate 2520 and Accurate 2495.
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 2015 | <<locked>> | 90% | 43,178 psi | 90% | 2575 fps | 99.9% |
| Accurate 2460 | <<locked>> | 86% | 41,191 psi | 86% | 2562 fps | 97.9% |
| Accurate 2495 | <<locked>> | 96% | 40,872 psi | 85% | 2602 fps | 99.9% |
| Accurate 2520 | <<locked>> | 90% | 41,104 psi | 86% | 2598 fps | 97.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 43,120 psi | 90% | 2661 fps | 99% |
| Accurate LT-30 | <<locked>> | 82% | 42,467 psi | 89% | 2487 fps | 99.2% |
| Accurate LT-32 | <<locked>> | 82% | 42,902 psi | 90% | 2493 fps | 97.8% |
| ADI AR 2219 | <<locked>> | 84% | 43,163 psi | 90% | 2621 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 90% | 41,974 psi | 88% | 2572 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 92% | 42,018 psi | 88% | 2638 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 40,785 psi | 85% | 2546 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 40,872 psi | 85% | 2477 fps | 99.2% |
| Bofors RP3ᴾ | <<locked>> | 100% | 42,844 psi | 90% | 2654 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 42,192 psi | 88% | 2533 fps | 96.5% |
| Hodgdon BL-C2 | <<locked>> | 92% | 42,148 psi | 88% | 2638 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 86% | 42,148 psi | 88% | 2602 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 86% | 42,757 psi | 89% | 2615 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,953 psi | 69% | 1647 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 42,670 psi | 89% | 2671 fps | 99.7% |
| IMR 4198 | <<locked>> | 84% | 42,018 psi | 88% | 2523 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 41,974 psi | 88% | 2572 fps | 95.8% |
| Lovex D073.5 | <<locked>> | 86% | 40,886 psi | 85% | 2556 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 94% | 42,322 psi | 88% | 2631 fps | 97.8% |
| Lovex S062 | <<locked>> | 96% | 41,205 psi | 86% | 2575 fps | 95.8% |
| Norma 201 | <<locked>> | 92% | 41,060 psi | 86% | 2559 fps | 95.7% |
| Norma 202 | <<locked>> | 92% | 40,727 psi | 85% | 2579 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,083 psi | 69% | 1686 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 41,989 psi | 88% | 2575 fps | 97.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 41,800 psi | 87% | 2677 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 90% | 42,525 psi | 89% | 2572 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 94% | 41,452 psi | 87% | 2559 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 94% | 42,322 psi | 88% | 2631 fps | 97.8% |
| Shooters World Precision | <<locked>> | 96% | 41,205 psi | 86% | 2575 fps | 95.8% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 41,191 psi | 86% | 2575 fps | 98.1% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 41,727 psi | 87% | 2556 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 41,307 psi | 86% | 2500 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 42,380 psi | 89% | 2533 fps | 99.1% |
| Somchem S321 | <<locked>> | 88% | 42,366 psi | 89% | 2605 fps | 96.3% |
| Somchem S335 | <<locked>> | 92% | 42,656 psi | 89% | 2543 fps | 99% |
| Vihtavuori N130 | <<locked>> | 86% | 41,568 psi | 87% | 2507 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 40,901 psi | 85% | 2507 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 96% | 41,626 psi | 87% | 2602 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 94% | 41,147 psi | 86% | 2562 fps | 98.5% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 39,827 psi | 83% | 2546 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 90% | 42,206 psi | 88% | 2572 fps | 96% |
| Vihtavuori N540 | <<locked>> | 96% | 42,424 psi | 89% | 2598 fps | 98.3% |
| Winchester 748 | <<locked>> | 92% | 43,047 psi | 90% | 2654 fps | 97.2% |
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 2015 | <<locked>> | 80% | 31,459 psi | 66% | 2339 fps | 98.1% |
| Accurate 2460 | <<locked>> | 80% | 33,620 psi | 70% | 2408 fps | 95.8% |
| Accurate 2495 | 21.1 gr | 80% | 23,772 psi | 50% | 2205 fps | 95.5% |
| Accurate 2520 | 23.9 gr | 84% | 33,446 psi | 70% | 2441 fps | 95.3% |
| Accurate 4064 | <<locked>> | 88% | 29,544 psi | 62% | 2375 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 40,059 psi | 84% | 2441 fps | 98.8% |
| Accurate LT-32 | <<locked>> | 80% | 40,437 psi | 84% | 2448 fps | 97.3% |
| ADI AR 2219 | <<locked>> | 80% | 37,753 psi | 79% | 2516 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 88% | 39,624 psi | 83% | 2530 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 28,674 psi | 60% | 2352 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,100 psi | 75% | 2454 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,667 psi | 81% | 2434 fps | 98.8% |
| Bofors RP3 | <<locked>> | 98% | 40,277 psi | 84% | 2608 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 37,231 psi | 78% | 2434 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 88% | 36,593 psi | 76% | 2526 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 34,708 psi | 73% | 2451 fps | 97.5% |
| Hodgdon H335 | <<locked>> | 80% | 35,027 psi | 73% | 2461 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,424 psi | 51% | 1473 fps | 100% |
| IMR 3031 | 20.9 gr | 80% | 27,528 psi | 58% | 2323 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 37,637 psi | 79% | 2444 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 39,624 psi | 83% | 2530 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 82% | 35,853 psi | 75% | 2454 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 88% | 34,360 psi | 72% | 2474 fps | 95.6% |
| Lovex S062 | <<locked>> | 94% | 38,856 psi | 81% | 2530 fps | 95.1% |
| Norma 201 | <<locked>> | 90% | 38,711 psi | 81% | 2513 fps | 95% |
| Norma 202 | <<locked>> | 84% | 31,662 psi | 66% | 2382 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,221 psi | 51% | 1503 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 34,360 psi | 72% | 2418 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 39,479 psi | 82% | 2625 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 82% | 33,301 psi | 70% | 2382 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 92% | 39,073 psi | 82% | 2510 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 88% | 34,360 psi | 72% | 2474 fps | 95.6% |
| Shooters World Precision | <<locked>> | 94% | 38,856 psi | 81% | 2530 fps | 95.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,406 psi | 80% | 2523 fps | 97.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,419 psi | 76% | 2454 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 32,068 psi | 67% | 2306 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 29,515 psi | 62% | 2267 fps | 95.7% |
| Somchem S321 | <<locked>> | 86% | 39,523 psi | 83% | 2549 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 29,443 psi | 62% | 2264 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 34,330 psi | 72% | 2365 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 80% | 29,878 psi | 62% | 2277 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 80% | 25,034 psi | 52% | 2221 fps | 95.8% |
| Vihtavuori N140 | <<locked>> | 84% | 29,936 psi | 63% | 2320 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 98% | 37,492 psi | 78% | 2497 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 88% | 39,276 psi | 82% | 2516 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 88% | 32,822 psi | 69% | 2405 fps | 95.6% |
| Winchester 748 | <<locked>> | 88% | 37,898 psi | 79% | 2552 fps | 95.7% |
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 47 powders for 6 x 52 R Bretschneider loaded with the .243 | 90gr | Berger BT M T. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,677 fps. Accurate 4064 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Bofors RP3, 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. IMR 3031, Accurate 2520, Accurate 2495 rank at the top here: for 6 x 52 R Bretschneider with the .243 | 90gr | Berger BT M T 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.