Load Specifications
Load data in caliber 6 x 52 R Bretschneider with .243 | 90gr | Speer Deep Curl Soft Point bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon BL-C2, ReloadSwiss RS 60 and Lovex D073.6.
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>> | 88% | 42,409 psi | 89% | 2579 fps | 99.9% |
| Accurate 2460 | <<locked>> | 84% | 40,785 psi | 85% | 2575 fps | 98.2% |
| Accurate 2495 | <<locked>> | 94% | 41,104 psi | 86% | 2621 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 41,089 psi | 86% | 2621 fps | 98% |
| Accurate 4064 | <<locked>> | 96% | 40,669 psi | 85% | 2638 fps | 98.8% |
| ADI AR 2219 | <<locked>> | 82% | 42,786 psi | 89% | 2635 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 41,437 psi | 87% | 2585 fps | 96.1% |
| Alliant AR-Comp | <<locked>> | 90% | 42,177 psi | 88% | 2657 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 43,279 psi | 90% | 2674 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 84% | 42,772 psi | 89% | 2598 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 42,975 psi | 90% | 2536 fps | 99.6% |
| Bofors RP3 | <<locked>> | 98% | 43,018 psi | 90% | 2680 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 41,713 psi | 87% | 2549 fps | 96.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 41,930 psi | 88% | 2654 fps | 97% |
| Hodgdon H322 | <<locked>> | 84% | 41,800 psi | 87% | 2618 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 84% | 42,206 psi | 88% | 2628 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 42,656 psi | 89% | 2687 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,344 psi | 70% | 1673 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 42,772 psi | 89% | 2694 fps | 99.8% |
| IMR 4198 | <<locked>> | 82% | 41,626 psi | 87% | 2539 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 41,437 psi | 87% | 2585 fps | 96.1% |
| Lovex D073.5 | <<locked>> | 86% | 43,279 psi | 90% | 2621 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 92% | 42,192 psi | 88% | 2651 fps | 98.2% |
| Lovex S062 | <<locked>> | 94% | 41,147 psi | 86% | 2598 fps | 96.2% |
| Norma 201 | <<locked>> | 90% | 40,611 psi | 85% | 2572 fps | 96.1% |
| Norma 202 | <<locked>> | 92% | 43,149 psi | 90% | 2644 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,475 psi | 70% | 1716 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 41,553 psi | 87% | 2592 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 41,379 psi | 86% | 2700 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 88% | 42,279 psi | 88% | 2592 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 92% | 40,915 psi | 85% | 2572 fps | 96.1% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 42,351 psi | 88% | 2657 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 42,192 psi | 88% | 2651 fps | 98.2% |
| Shooters World Precision | <<locked>> | 94% | 41,147 psi | 86% | 2598 fps | 96.2% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 43,192 psi | 90% | 2638 fps | 98.7% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 41,234 psi | 86% | 2569 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 40,886 psi | 85% | 2513 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 42,105 psi | 88% | 2549 fps | 99.3% |
| Somchem S321 | <<locked>> | 86% | 41,684 psi | 87% | 2615 fps | 96.6% |
| Somchem S335 | <<locked>> | 90% | 42,119 psi | 88% | 2556 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 84% | 40,944 psi | 86% | 2513 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 42,975 psi | 90% | 2562 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 94% | 41,742 psi | 87% | 2621 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 41,060 psi | 86% | 2582 fps | 98.8% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,235 psi | 88% | 2612 fps | 97% |
| Vihtavuori N530 | <<locked>> | 88% | 41,568 psi | 87% | 2585 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 94% | 42,047 psi | 88% | 2615 fps | 98.5% |
| Winchester 748 | <<locked>> | 90% | 42,714 psi | 89% | 2671 fps | 97.5% |
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% | 33,257 psi | 69% | 2402 fps | 98.8% |
| Accurate 2460 | <<locked>> | 80% | 35,578 psi | 74% | 2470 fps | 96.9% |
| Accurate 2495 | <<locked>> | 80% | 25,715 psi | 54% | 2277 fps | 96.9% |
| Accurate 2520 | <<locked>> | 82% | 33,344 psi | 70% | 2457 fps | 95.7% |
| Accurate 4064 | <<locked>> | 86% | 29,414 psi | 61% | 2388 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 39,929 psi | 83% | 2582 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 39,218 psi | 82% | 2543 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 30,298 psi | 63% | 2411 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 40,857 psi | 85% | 2628 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,101 psi | 80% | 2513 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,364 psi | 84% | 2487 fps | 99.3% |
| Bofors RP3 | <<locked>> | 96% | 40,089 psi | 84% | 2625 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 37,057 psi | 77% | 2454 fps | 95.5% |
| Hodgdon BL-C2 | 26.1 gr | 86% | 36,593 psi | 76% | 2546 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 36,347 psi | 76% | 2507 fps | 98.3% |
| Hodgdon H335 | <<locked>> | 80% | 36,869 psi | 77% | 2520 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 40,001 psi | 84% | 2635 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,729 psi | 52% | 1499 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,066 psi | 61% | 2385 fps | 96.8% |
| IMR 4198 | <<locked>> | 80% | 39,262 psi | 82% | 2493 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 39,218 psi | 82% | 2543 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 80% | 35,302 psi | 74% | 2464 fps | 95.4% |
| Lovex D073.6 | 24.6 gr | 84% | 31,865 psi | 67% | 2434 fps | 95.1% |
| Lovex S062 | <<locked>> | 92% | 38,885 psi | 81% | 2556 fps | 95.6% |
| Norma 201 | <<locked>> | 88% | 38,392 psi | 80% | 2526 fps | 95.4% |
| Norma 202 | <<locked>> | 80% | 29,588 psi | 62% | 2349 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,555 psi | 51% | 1529 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,289 psi | 76% | 2484 fps | 96.2% |
| ReloadSwiss RS 60 | 28 gr | 94% | 36,303 psi | 76% | 2582 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 33,170 psi | 69% | 2398 fps | 96% |
| Rottweil R 902 | <<locked>> | 90% | 38,725 psi | 81% | 2526 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 98% | 39,972 psi | 84% | 2615 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,865 psi | 67% | 2434 fps | 95.1% |
| Shooters World Precision | <<locked>> | 92% | 38,885 psi | 81% | 2556 fps | 95.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,393 psi | 84% | 2582 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,406 psi | 80% | 2516 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,705 psi | 66% | 2320 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 27,528 psi | 58% | 2234 fps | 95.2% |
| Somchem S321 | <<locked>> | 82% | 36,535 psi | 76% | 2510 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 31,256 psi | 65% | 2329 fps | 96.6% |
| Vihtavuori N130 | <<locked>> | 80% | 36,143 psi | 76% | 2421 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 80% | 31,517 psi | 66% | 2333 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 80% | 26,571 psi | 56% | 2283 fps | 97% |
| Vihtavuori N140 | <<locked>> | 82% | 29,907 psi | 62% | 2339 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 96% | 37,188 psi | 78% | 2516 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 86% | 38,827 psi | 81% | 2533 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 84% | 30,472 psi | 64% | 2365 fps | 95.1% |
| Winchester 748 | <<locked>> | 84% | 34,998 psi | 73% | 2510 fps | 95.1% |
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 48 powders for 6 x 52 R Bretschneider loaded with the .243 | 90gr | Speer Deep Curl Soft Point. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,700 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Rottweil R 903 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. Hodgdon BL-C2, ReloadSwiss RS 60, Lovex D073.6 rank at the top here: for 6 x 52 R Bretschneider with the .243 | 90gr | Speer Deep Curl Soft Point 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.