Load Specifications
Load data in caliber 6 x 52 R Bretschneider with .243 | 73gr | SUS-TAC HPT bullet and 31 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, IMR 3031 and Hodgdon H322.
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>> | 94% | 41,379 psi | 86% | 2808 fps | 98.5% |
| Accurate 2460 | <<locked>> | 92% | 42,380 psi | 89% | 2841 fps | 95.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 37,608 psi | 79% | 2805 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 86% | 42,293 psi | 88% | 2733 fps | 97.4% |
| ADI AR 2207 | <<locked>> | 84% | 41,408 psi | 87% | 2795 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 42,177 psi | 88% | 2864 fps | 97.2% |
| Alliant AR-Comp | <<locked>> | 98% | 43,105 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 90% | 41,945 psi | 88% | 2841 fps | 99.4% |
| Alliant Reloder-7 | <<locked>> | 82% | 40,828 psi | 85% | 2756 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 40,625 psi | 85% | 2720 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 90% | 41,205 psi | 86% | 2841 fps | 97% |
| Hodgdon H335 | <<locked>> | 90% | 41,858 psi | 87% | 2854 fps | 96% |
| Hodgdon H4198 | <<locked>> | 82% | 41,510 psi | 87% | 2736 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,575 psi | 66% | 1814 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 41,075 psi | 86% | 2904 fps | 97.8% |
| IMR 4198 | <<locked>> | 88% | 41,104 psi | 86% | 2779 fps | 99.7% |
| Norma 200 | <<locked>> | 86% | 42,105 psi | 88% | 2825 fps | 99.7% |
| Norma 202 | <<locked>> | 98% | 41,510 psi | 87% | 2848 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,488 psi | 66% | 1860 fps | 100% |
| Rottweil R 901 | <<locked>> | 96% | 43,236 psi | 90% | 2848 fps | 96.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 42,453 psi | 89% | 2569 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 42,772 psi | 89% | 2867 fps | 96.2% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 42,525 psi | 89% | 2841 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 42,815 psi | 89% | 2772 fps | 96.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 38,580 psi | 81% | 2703 fps | 96.2% |
| Somchem S335 | <<locked>> | 96% | 41,452 psi | 87% | 2772 fps | 96.9% |
| Vihtavuori N120 | <<locked>> | 84% | 41,539 psi | 87% | 2756 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 43,018 psi | 90% | 2795 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 96% | 41,959 psi | 88% | 2785 fps | 98.5% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 39,218 psi | 82% | 2822 fps | 98.4% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 42,076 psi | 88% | 2828 fps | 96.5% |
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>> | 84% | 29,863 psi | 62% | 2543 fps | 95.1% |
| Accurate 2460 | <<locked>> | 90% | 39,450 psi | 82% | 2779 fps | 95.1% |
| Accurate 2495 | <<locked>> | 92% | 28,790 psi | 60% | 2595 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 35,085 psi | 73% | 2579 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 36,622 psi | 77% | 2700 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 37,057 psi | 77% | 2749 fps | 95.7% |
| Alliant AR-Comp | 21.8 gr | 82% | 26,107 psi | 55% | 2503 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,603 psi | 64% | 2579 fps | 96.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 38,029 psi | 79% | 2697 fps | 99% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 33,344 psi | 70% | 2556 fps | 95.1% |
| Hodgdon H322 | 23.6 gr | 86% | 36,187 psi | 76% | 2730 fps | 95.4% |
| Hodgdon H335 | <<locked>> | 88% | 39,015 psi | 82% | 2795 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 38,667 psi | 81% | 2674 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,380 psi | 49% | 1627 fps | 100% |
| IMR 3031 | 24.4 gr | 92% | 34,011 psi | 71% | 2736 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 32,764 psi | 68% | 2589 fps | 98.2% |
| Norma 200 | <<locked>> | 80% | 34,853 psi | 73% | 2671 fps | 98.6% |
| Norma 202 | <<locked>> | 96% | 39,160 psi | 82% | 2802 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,047 psi | 48% | 1660 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 40,828 psi | 85% | 2799 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,958 psi | 83% | 2526 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 39,929 psi | 83% | 2808 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 33,402 psi | 70% | 2635 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 40,277 psi | 84% | 2726 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 36,347 psi | 76% | 2654 fps | 95.4% |
| Somchem S335 | <<locked>> | 92% | 36,593 psi | 76% | 2671 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 36,811 psi | 77% | 2664 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,820 psi | 62% | 2500 fps | 96.1% |
| Vihtavuori N133 | <<locked>> | 86% | 30,937 psi | 65% | 2536 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 92% | 30,821 psi | 64% | 2621 fps | 95.7% |
| Vihtavuori N140 | <<locked>> | 98% | 39,740 psi | 83% | 2782 fps | 95.9% |
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 31 powders for 6 x 52 R Bretschneider loaded with the .243 | 73gr | SUS-TAC HPT. Alliant AR-Comp delivers the highest muzzle velocity at 2,933 fps; across all powders the maximum-charge window runs from 1,814 fps to 2,933 fps. Accurate 2495 gives the best case fill at 100 %, and 31 of the 31 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 73.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, 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. Alliant AR-Comp, IMR 3031, Hodgdon H322 rank at the top here: for 6 x 52 R Bretschneider with the .243 | 73gr | SUS-TAC HPT 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.