Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 74gr | Berger M bullet and 39 powders. The key underlying parameters are shown in the table above.
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>> | 86% | 41,611 psi | 87% | 2887 fps | 99.7% |
| Accurate 2460 | <<locked>> | 84% | 42,467 psi | 89% | 2923 fps | 98% |
| Accurate 2495 | <<locked>> | 94% | 43,091 psi | 90% | 2976 fps | 99.9% |
| Accurate 2520 | <<locked>> | 88% | 43,163 psi | 90% | 2976 fps | 97.8% |
| Accurate 4064 | <<locked>> | 96% | 43,047 psi | 90% | 2995 fps | 98.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 43,018 psi | 90% | 2936 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 88% | 41,249 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 41,800 psi | 87% | 2910 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 86% | 43,047 psi | 90% | 2894 fps | 96.5% |
| Hodgdon BL-C2 | <<locked>> | 88% | 40,886 psi | 85% | 2946 fps | 96% |
| Hodgdon H322 | <<locked>> | 84% | 43,105 psi | 90% | 2966 fps | 99% |
| Hodgdon H335 | <<locked>> | 82% | 41,176 psi | 86% | 2923 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,185 psi | 69% | 1932 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 41,843 psi | 87% | 3002 fps | 99.4% |
| IMR 4198 | <<locked>> | 82% | 42,946 psi | 90% | 2894 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 43,018 psi | 90% | 2936 fps | 95.8% |
| Lovex D073.5 | <<locked>> | 84% | 42,525 psi | 89% | 2923 fps | 96.8% |
| Lovex D073.6 | <<locked>> | 90% | 41,379 psi | 86% | 2949 fps | 97.3% |
| Lovex S062 | <<locked>> | 94% | 42,931 psi | 90% | 2949 fps | 96% |
| Norma 201 | <<locked>> | 90% | 42,612 psi | 89% | 2930 fps | 95.9% |
| Norma 202 | <<locked>> | 90% | 42,322 psi | 88% | 2949 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,562 psi | 70% | 1985 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 42,801 psi | 89% | 2936 fps | 97.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 40,799 psi | 85% | 3002 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 86% | 41,234 psi | 86% | 2890 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 92% | 42,830 psi | 89% | 2923 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 41,379 psi | 86% | 2949 fps | 97.3% |
| Shooters World Precision | <<locked>> | 94% | 42,931 psi | 90% | 2949 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 42,525 psi | 89% | 2923 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 42,177 psi | 88% | 2854 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 41,118 psi | 86% | 2844 fps | 98.7% |
| Somchem S335 | <<locked>> | 88% | 41,379 psi | 86% | 2858 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 84% | 42,235 psi | 88% | 2861 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 88% | 41,901 psi | 88% | 2864 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 92% | 40,930 psi | 86% | 2923 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 92% | 42,902 psi | 90% | 2930 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 98% | 41,713 psi | 87% | 2913 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 92% | 41,350 psi | 86% | 2913 fps | 97.8% |
| Winchester 748 | <<locked>> | 88% | 41,959 psi | 88% | 2976 fps | 96.6% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 34,272 psi | 72% | 2723 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 37,144 psi | 78% | 2808 fps | 96.6% |
| Accurate 2495 | <<locked>> | 80% | 26,774 psi | 56% | 2579 fps | 96.3% |
| Accurate 2520 | <<locked>> | 82% | 34,853 psi | 73% | 2789 fps | 95.3% |
| Accurate 4064 | <<locked>> | 86% | 30,922 psi | 65% | 2710 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 40,712 psi | 85% | 2887 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 31,459 psi | 66% | 2743 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 39,436 psi | 82% | 2861 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 38,203 psi | 80% | 2785 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 86% | 38,247 psi | 80% | 2887 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 37,898 psi | 79% | 2854 fps | 98% |
| Hodgdon H335 | <<locked>> | 80% | 38,493 psi | 80% | 2864 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,511 psi | 51% | 1732 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 30,139 psi | 63% | 2710 fps | 96.3% |
| IMR 4198 | <<locked>> | 80% | 40,451 psi | 85% | 2844 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 40,712 psi | 85% | 2887 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 80% | 36,883 psi | 77% | 2799 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 86% | 36,042 psi | 75% | 2831 fps | 95.8% |
| Lovex S062 | <<locked>> | 92% | 40,553 psi | 85% | 2900 fps | 95.3% |
| Norma 201 | <<locked>> | 88% | 39,914 psi | 83% | 2871 fps | 95% |
| Norma 202 | <<locked>> | 82% | 32,634 psi | 68% | 2720 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,613 psi | 51% | 1775 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 37,492 psi | 78% | 2815 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 38,247 psi | 80% | 2936 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 34,214 psi | 71% | 2723 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 90% | 40,132 psi | 84% | 2864 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 86% | 36,042 psi | 75% | 2831 fps | 95.8% |
| Shooters World Precision | <<locked>> | 92% | 40,553 psi | 85% | 2900 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 39,711 psi | 83% | 2864 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,779 psi | 68% | 2638 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 30,095 psi | 63% | 2585 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 32,198 psi | 67% | 2641 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 80% | 37,304 psi | 78% | 2756 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 80% | 32,605 psi | 68% | 2654 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 80% | 27,572 psi | 58% | 2595 fps | 96.4% |
| Vihtavuori N140 | <<locked>> | 82% | 31,009 psi | 65% | 2654 fps | 95% |
| Vihtavuori N150 | <<locked>> | 96% | 38,986 psi | 81% | 2854 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 86% | 33,939 psi | 71% | 2743 fps | 95.6% |
| Winchester 748 | <<locked>> | 86% | 38,928 psi | 81% | 2907 fps | 95.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 39 powders for 6 x 52 R BB2 loaded with the .243 | 74gr | Berger M. IMR 3031 delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,002 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 39 of the 39 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 74.0 gr projectile in 0.243" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.