Load Specifications
Load data in caliber 6 x 52 R Bretschneider with .243 | 77gr | Ferrobull Tripple Expand Jagd bullet and 37 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 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>> | 92% | 42,525 psi | 89% | 2802 fps | 99.5% |
| Accurate 2460 | <<locked>> | 88% | 40,799 psi | 85% | 2789 fps | 96.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 42,656 psi | 89% | 2874 fps | 99.7% |
| Accurate 2520 | <<locked>> | 92% | 40,785 psi | 85% | 2825 fps | 96.5% |
| Accurate 4064ᴾ | <<locked>> | 100% | 39,610 psi | 83% | 2831 fps | 97.5% |
| Accurate LT-30 | <<locked>> | 84% | 42,902 psi | 90% | 2726 fps | 98.6% |
| Accurate LT-32 | <<locked>> | 82% | 40,538 psi | 85% | 2680 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 82% | 42,815 psi | 89% | 2785 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 43,308 psi | 90% | 2864 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 94% | 42,206 psi | 88% | 2887 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 42,989 psi | 90% | 2831 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 41,307 psi | 86% | 2710 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 88% | 42,337 psi | 88% | 2844 fps | 98.4% |
| Hodgdon H335 | <<locked>> | 88% | 43,105 psi | 90% | 2858 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,155 psi | 67% | 1814 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 42,598 psi | 89% | 2913 fps | 99.1% |
| IMR 4198 | <<locked>> | 86% | 42,279 psi | 88% | 2776 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 41,176 psi | 86% | 2802 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 96% | 41,742 psi | 87% | 2854 fps | 96.7% |
| Norma 200 | <<locked>> | 84% | 43,018 psi | 90% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 94% | 40,611 psi | 85% | 2808 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,053 psi | 67% | 1857 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 41,930 psi | 88% | 2808 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 92% | 41,669 psi | 87% | 2795 fps | 97.1% |
| Shooters World AR Plus | <<locked>> | 82% | 41,176 psi | 86% | 2802 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 96% | 41,742 psi | 87% | 2854 fps | 96.7% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 41,002 psi | 86% | 2808 fps | 97% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 41,220 psi | 86% | 2789 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 41,176 psi | 86% | 2726 fps | 97.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 42,366 psi | 89% | 2762 fps | 98.3% |
| Somchem S335 | <<locked>> | 94% | 42,685 psi | 89% | 2776 fps | 98.3% |
| Vihtavuori N120 | <<locked>> | 82% | 42,946 psi | 90% | 2743 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 41,307 psi | 86% | 2740 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 92% | 40,669 psi | 85% | 2736 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 98% | 41,365 psi | 86% | 2835 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 96% | 40,843 psi | 85% | 2785 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 98% | 42,482 psi | 89% | 2831 fps | 97.4% |
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% | 28,660 psi | 60% | 2487 fps | 96% |
| Accurate 2460 | <<locked>> | 84% | 35,592 psi | 74% | 2677 fps | 95.3% |
| Accurate 2495 | <<locked>> | 86% | 26,107 psi | 55% | 2487 fps | 95.4% |
| Accurate 2520 | <<locked>> | 90% | 38,029 psi | 79% | 2769 fps | 95.6% |
| Accurate 4064 | <<locked>> | 94% | 32,474 psi | 68% | 2671 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 37,971 psi | 79% | 2628 fps | 97.5% |
| Accurate LT-32 | <<locked>> | 80% | 38,334 psi | 80% | 2631 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 39,914 psi | 83% | 2733 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 35,244 psi | 74% | 2690 fps | 96.5% |
| Alliant AR-Comp | 22.8 gr | 80% | 26,513 psi | 55% | 2503 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,315 psi | 70% | 2625 fps | 98.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 36,056 psi | 75% | 2602 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 80% | 32,169 psi | 67% | 2612 fps | 95.4% |
| Hodgdon H335 | <<locked>> | 82% | 34,925 psi | 73% | 2680 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,496 psi | 49% | 1621 fps | 100% |
| IMR 3031 | 24.5 gr | 86% | 30,879 psi | 65% | 2635 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 35,172 psi | 73% | 2625 fps | 99.5% |
| Lovex D073.4 | <<locked>> | 80% | 37,985 psi | 79% | 2733 fps | 95.2% |
| Lovex D073.6 | 27.9 gr | 92% | 36,230 psi | 76% | 2740 fps | 95% |
| Norma 200 | <<locked>> | 80% | 37,507 psi | 78% | 2703 fps | 99.7% |
| Norma 202 | <<locked>> | 90% | 35,853 psi | 75% | 2703 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,554 psi | 49% | 1663 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 39,218 psi | 82% | 2753 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 88% | 36,927 psi | 77% | 2694 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 37,985 psi | 79% | 2733 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 36,230 psi | 76% | 2740 fps | 95% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 35,926 psi | 75% | 2697 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 34,142 psi | 71% | 2635 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 36,303 psi | 76% | 2621 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 32,982 psi | 69% | 2562 fps | 95.8% |
| Somchem S335 | <<locked>> | 86% | 33,156 psi | 69% | 2572 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 40,045 psi | 84% | 2690 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 32,213 psi | 67% | 2539 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 80% | 27,934 psi | 58% | 2434 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 84% | 26,179 psi | 55% | 2464 fps | 95% |
| Vihtavuori N140 | <<locked>> | 90% | 33,794 psi | 71% | 2631 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 92% | 34,838 psi | 73% | 2667 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 37 powders for 6 x 52 R Bretschneider loaded with the .243 | 77gr | Ferrobull Tripple Expand Jagd. IMR 3031 delivers the highest muzzle velocity at 2,913 fps; across all powders the maximum-charge window runs from 1,814 fps to 2,913 fps. Accurate 2495 gives the best case fill at 100 %, and 37 of the 37 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 67–90 %, leaving at least 10 % headroom. The 77.0 gr projectile in 0.243" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, 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. Alliant AR-Comp, IMR 3031, Lovex D073.6 rank at the top here: for 6 x 52 R Bretschneider with the .243 | 77gr | Ferrobull Tripple Expand Jagd 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.