Load Specifications
Load data in caliber 6 x 52 R Bretschneider with .243 | 75gr | Speer Varmint Hollow Point bullet and 36 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% | 40,669 psi | 85% | 2795 fps | 99.1% |
| Accurate 2460 | <<locked>> | 88% | 41,785 psi | 87% | 2831 fps | 96.8% |
| Accurate 2495 | <<locked>> | 98% | 40,828 psi | 85% | 2864 fps | 99.4% |
| Accurate 2520 | <<locked>> | 92% | 42,061 psi | 88% | 2877 fps | 96.5% |
| Accurate 4064ᴾ | <<locked>> | 100% | 40,712 psi | 85% | 2877 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 82% | 40,915 psi | 85% | 2713 fps | 98% |
| Accurate LT-32 | <<locked>> | 82% | 41,278 psi | 86% | 2720 fps | 96.1% |
| ADI AR 2207 | <<locked>> | 82% | 43,250 psi | 90% | 2822 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 41,162 psi | 86% | 2848 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 94% | 42,902 psi | 90% | 2927 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 41,582 psi | 87% | 2831 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 41,930 psi | 88% | 2749 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 88% | 42,989 psi | 90% | 2884 fps | 98.3% |
| Hodgdon H335 | <<locked>> | 86% | 41,031 psi | 86% | 2841 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,372 psi | 68% | 1841 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 43,265 psi | 90% | 2953 fps | 99.1% |
| IMR 4198 | <<locked>> | 86% | 43,033 psi | 90% | 2818 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 42,163 psi | 88% | 2844 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 96% | 42,960 psi | 90% | 2904 fps | 96.7% |
| Norma 200 | <<locked>> | 82% | 41,452 psi | 87% | 2808 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 41,336 psi | 86% | 2848 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,329 psi | 68% | 1883 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 42,641 psi | 89% | 2848 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 92% | 42,902 psi | 90% | 2844 fps | 97.1% |
| Shooters World AR Plus | <<locked>> | 82% | 42,163 psi | 88% | 2844 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 96% | 42,960 psi | 90% | 2904 fps | 96.7% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 41,756 psi | 87% | 2848 fps | 97% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 41,974 psi | 88% | 2831 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 41,945 psi | 88% | 2766 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 40,625 psi | 85% | 2756 fps | 97.8% |
| Somchem S335 | <<locked>> | 92% | 40,785 psi | 85% | 2766 fps | 97.7% |
| Vihtavuori N130 | <<locked>> | 88% | 42,177 psi | 88% | 2782 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 92% | 41,394 psi | 86% | 2776 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 98% | 42,105 psi | 88% | 2877 fps | 99.4% |
| Vihtavuori N140 | <<locked>> | 96% | 41,989 psi | 88% | 2835 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 98% | 43,047 psi | 90% | 2867 fps | 97.3% |
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% | 29,776 psi | 62% | 2536 fps | 96.1% |
| Accurate 2460 | <<locked>> | 84% | 36,680 psi | 77% | 2720 fps | 95.3% |
| Accurate 2495 | <<locked>> | 86% | 27,151 psi | 57% | 2536 fps | 95.6% |
| Accurate 2520 | <<locked>> | 90% | 39,291 psi | 82% | 2818 fps | 95.7% |
| Accurate 4064 | <<locked>> | 94% | 33,634 psi | 70% | 2720 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 38,348 psi | 80% | 2661 fps | 97.4% |
| Accurate LT-32 | <<locked>> | 80% | 38,711 psi | 81% | 2664 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 40,930 psi | 86% | 2779 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 36,071 psi | 75% | 2733 fps | 96.5% |
| Alliant AR-Comp | 23 gr | 80% | 27,137 psi | 57% | 2543 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,374 psi | 72% | 2674 fps | 98.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 36,724 psi | 77% | 2641 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 80% | 32,996 psi | 69% | 2654 fps | 95.4% |
| Hodgdon H335 | <<locked>> | 82% | 35,694 psi | 75% | 2723 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,859 psi | 50% | 1647 fps | 100% |
| IMR 3031 | 24.7 gr | 86% | 31,357 psi | 66% | 2671 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 36,056 psi | 75% | 2671 fps | 99.5% |
| Lovex D073.4 | <<locked>> | 80% | 38,914 psi | 81% | 2779 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 94% | 39,697 psi | 83% | 2838 fps | 95.8% |
| Norma 200 | <<locked>> | 80% | 38,812 psi | 81% | 2753 fps | 99.7% |
| Norma 202 | 26.4 gr | 90% | 36,651 psi | 77% | 2746 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,946 psi | 50% | 1690 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 39,987 psi | 84% | 2792 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 86% | 35,795 psi | 75% | 2687 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 38,914 psi | 81% | 2779 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 94% | 39,697 psi | 83% | 2838 fps | 95.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,709 psi | 77% | 2736 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 34,621 psi | 72% | 2671 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 37,188 psi | 78% | 2667 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 33,736 psi | 70% | 2602 fps | 95.7% |
| Somchem S335 | <<locked>> | 86% | 33,765 psi | 71% | 2608 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 32,793 psi | 69% | 2575 fps | 98% |
| Vihtavuori N133 | <<locked>> | 80% | 28,500 psi | 60% | 2470 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 84% | 27,108 psi | 57% | 2513 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 90% | 34,577 psi | 72% | 2671 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 92% | 35,563 psi | 74% | 2707 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 36 powders for 6 x 52 R Bretschneider loaded with the .243 | 75gr | Speer Varmint Hollow Point. IMR 3031 delivers the highest muzzle velocity at 2,953 fps; across all powders the maximum-charge window runs from 1,841 fps to 2,953 fps. Accurate 4064 gives the best case fill at 100 %, and 36 of the 36 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 75.0 gr projectile in 0.243" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, 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. IMR 3031, Alliant AR-Comp, Norma 202 rank at the top here: for 6 x 52 R Bretschneider with the .243 | 75gr | Speer Varmint Hollow 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.