Load Specifications
Load data in caliber 6 x 52 R Bretschneider with .243 | 80gr | Berger Varmint bullet and 37 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Alliant AR-Comp and Norma 202.
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% | 41,321 psi | 86% | 2713 fps | 99.4% |
| Accurate 2460 | <<locked>> | 88% | 42,293 psi | 88% | 2749 fps | 97.4% |
| Accurate 2495 | <<locked>> | 98% | 41,611 psi | 87% | 2782 fps | 99.6% |
| Accurate 2520 | <<locked>> | 92% | 42,815 psi | 89% | 2799 fps | 97.2% |
| Accurate 4064ᴾ | <<locked>> | 100% | 41,553 psi | 87% | 2802 fps | 98% |
| Accurate LT-30 | <<locked>> | 82% | 41,553 psi | 87% | 2635 fps | 98.5% |
| Accurate LT-32 | <<locked>> | 82% | 41,916 psi | 88% | 2641 fps | 96.8% |
| ADI AR 2219 | <<locked>> | 84% | 41,800 psi | 87% | 2766 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 92% | 40,886 psi | 85% | 2792 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 42,003 psi | 88% | 2743 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 42,685 psi | 89% | 2671 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 88% | 43,279 psi | 90% | 2795 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 86% | 41,452 psi | 87% | 2759 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,779 psi | 68% | 1772 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 41,408 psi | 87% | 2822 fps | 99.1% |
| IMR 4198 | <<locked>> | 86% | 43,221 psi | 90% | 2723 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 42,395 psi | 89% | 2756 fps | 96.7% |
| Lovex D073.5 | <<locked>> | 88% | 42,337 psi | 88% | 2746 fps | 96.1% |
| Lovex D073.6 | <<locked>> | 94% | 40,437 psi | 84% | 2766 fps | 96.5% |
| Norma 200 | <<locked>> | 82% | 41,814 psi | 87% | 2717 fps | 100% |
| Norma 202 | <<locked>> | 94% | 42,308 psi | 88% | 2776 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,793 psi | 69% | 1814 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 40,654 psi | 85% | 2713 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 90% | 41,263 psi | 86% | 2717 fps | 97.1% |
| Shooters World AR Plus | <<locked>> | 82% | 42,395 psi | 89% | 2756 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 94% | 40,437 psi | 84% | 2766 fps | 96.5% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 42,569 psi | 89% | 2772 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 42,931 psi | 90% | 2753 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 42,612 psi | 89% | 2687 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 41,075 psi | 86% | 2674 fps | 98.2% |
| Somchem S335 | <<locked>> | 92% | 41,162 psi | 86% | 2680 fps | 98.1% |
| Vihtavuori N130 | <<locked>> | 88% | 42,641 psi | 89% | 2694 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 92% | 42,076 psi | 88% | 2694 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 98% | 42,670 psi | 89% | 2792 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 96% | 42,612 psi | 89% | 2753 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 96% | 41,118 psi | 86% | 2740 fps | 97.2% |
| Winchester 748 | <<locked>> | 92% | 41,887 psi | 88% | 2795 fps | 95.8% |
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% | 30,298 psi | 63% | 2464 fps | 96.9% |
| Accurate 2460 | <<locked>> | 82% | 34,490 psi | 72% | 2582 fps | 95.1% |
| Accurate 2495 | <<locked>> | 84% | 26,034 psi | 54% | 2421 fps | 95.6% |
| Accurate 2520 | <<locked>> | 88% | 36,825 psi | 77% | 2677 fps | 95.4% |
| Accurate 4064 | <<locked>> | 92% | 31,865 psi | 67% | 2585 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 38,899 psi | 81% | 2582 fps | 97.9% |
| Accurate LT-32 | <<locked>> | 80% | 39,218 psi | 82% | 2585 fps | 96% |
| ADI AR 2219 | <<locked>> | 80% | 36,463 psi | 76% | 2651 fps | 97.1% |
| Alliant AR-Comp | 22.2 gr | 80% | 27,601 psi | 58% | 2474 fps | 98.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,911 psi | 73% | 2592 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 37,217 psi | 78% | 2562 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 33,257 psi | 69% | 2575 fps | 96% |
| Hodgdon H335 | <<locked>> | 80% | 33,620 psi | 70% | 2582 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,902 psi | 50% | 1578 fps | 100% |
| IMR 3031 | 23.3 gr | 84% | 30,037 psi | 63% | 2546 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 36,332 psi | 76% | 2585 fps | 99.7% |
| Lovex D073.4 | <<locked>> | 80% | 39,566 psi | 83% | 2700 fps | 96% |
| Lovex D073.5 | <<locked>> | 86% | 39,566 psi | 83% | 2690 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 92% | 37,739 psi | 79% | 2707 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 39,508 psi | 83% | 2674 fps | 99.9% |
| Norma 202 | 24.9 gr | 88% | 34,940 psi | 73% | 2618 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,062 psi | 50% | 1621 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 38,000 psi | 79% | 2657 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 86% | 36,593 psi | 76% | 2618 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 80% | 39,566 psi | 83% | 2700 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 92% | 37,739 psi | 79% | 2707 fps | 95.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,898 psi | 77% | 2651 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,157 psi | 73% | 2592 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 35,491 psi | 74% | 2539 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 32,024 psi | 67% | 2477 fps | 95.6% |
| Somchem S335 | <<locked>> | 84% | 32,358 psi | 68% | 2487 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 33,272 psi | 70% | 2500 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 80% | 28,921 psi | 60% | 2402 fps | 96.1% |
| Vihtavuori N135 | <<locked>> | 82% | 25,831 psi | 54% | 2392 fps | 95% |
| Vihtavuori N140 | <<locked>> | 88% | 32,953 psi | 69% | 2546 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 92% | 36,027 psi | 75% | 2631 fps | 95.7% |
| Winchester 748 | <<locked>> | 90% | 39,218 psi | 82% | 2740 fps | 95% |
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 77 powders for 6 x 52 R Bretschneider loaded with the .243 | 80gr | Berger Varmint. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,848 fps; across all powders the maximum-charge window runs from 1,772 fps to 2,848 fps. Accurate 4064 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Alliant Reloder- TS 15.5, Bofors RP3 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, Alliant AR-Comp, Norma 202 rank at the top here: for 6 x 52 R Bretschneider with the .243 | 80gr | Berger Varmint they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2200, Accurate 2230, ADI AR 2206H burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.