Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 75gr | Peregrine VLR-4 bullet and 35 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 Accurate 2495.
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>> | 88% | 41,017 psi | 86% | 2851 fps | 99.5% |
| Accurate 2460 | <<locked>> | 86% | 42,032 psi | 88% | 2890 fps | 97.7% |
| Accurate 2495 | <<locked>> | 96% | 41,423 psi | 87% | 2920 fps | 99.8% |
| Accurate 2520 | <<locked>> | 90% | 42,583 psi | 89% | 2936 fps | 97.5% |
| Accurate 4064 | <<locked>> | 98% | 41,626 psi | 87% | 2946 fps | 98.4% |
| Accurate LT-30 | <<locked>> | 82% | 43,294 psi | 90% | 2818 fps | 99% |
| ADI AR 2219 | <<locked>> | 82% | 41,133 psi | 86% | 2900 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 92% | 43,120 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 41,510 psi | 87% | 2881 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 41,829 psi | 87% | 2799 fps | 99% |
| Hodgdon Benchmark | <<locked>> | 88% | 43,018 psi | 90% | 2861 fps | 96.3% |
| Hodgdon H322 | <<locked>> | 86% | 42,917 psi | 90% | 2936 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 84% | 41,046 psi | 86% | 2894 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,938 psi | 69% | 1900 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 41,118 psi | 86% | 2963 fps | 99.2% |
| IMR 4198 | <<locked>> | 84% | 42,873 psi | 90% | 2864 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 41,785 psi | 87% | 2881 fps | 96.4% |
| Lovex D073.6 | <<locked>> | 92% | 40,321 psi | 84% | 2904 fps | 96.9% |
| Norma 202 | <<locked>> | 92% | 41,742 psi | 87% | 2910 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,822 psi | 69% | 1942 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 42,670 psi | 89% | 2904 fps | 97% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 43,221 psi | 90% | 3022 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 90% | 42,844 psi | 90% | 2900 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 40,321 psi | 84% | 2904 fps | 96.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 41,901 psi | 88% | 2904 fps | 97.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 42,076 psi | 88% | 2884 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 42,032 psi | 88% | 2822 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 40,843 psi | 85% | 2812 fps | 98.5% |
| Somchem S335 | <<locked>> | 90% | 40,669 psi | 85% | 2815 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 86% | 42,250 psi | 88% | 2831 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 90% | 41,742 psi | 87% | 2835 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 96% | 42,757 psi | 89% | 2936 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 94% | 42,134 psi | 88% | 2887 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 94% | 40,683 psi | 85% | 2871 fps | 97.5% |
| Winchester 748 | <<locked>> | 90% | 41,278 psi | 86% | 2933 fps | 96.2% |
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% | 31,517 psi | 66% | 2631 fps | 97.6% |
| Accurate 2460 | <<locked>> | 80% | 33,837 psi | 71% | 2707 fps | 95.2% |
| Accurate 2495 | 26.1 gr | 82% | 25,440 psi | 53% | 2526 fps | 95.5% |
| Accurate 2520 | <<locked>> | 86% | 36,738 psi | 77% | 2812 fps | 95.8% |
| Accurate 4064 | <<locked>> | 90% | 31,575 psi | 66% | 2710 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 40,770 psi | 85% | 2769 fps | 98.6% |
| ADI AR 2219 | <<locked>> | 80% | 38,624 psi | 81% | 2844 fps | 98% |
| Alliant AR-Comp | 25.2 gr | 80% | 29,008 psi | 61% | 2651 fps | 99% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,187 psi | 76% | 2766 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,088 psi | 82% | 2743 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 40,205 psi | 84% | 2802 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 35,143 psi | 73% | 2762 fps | 97.1% |
| Hodgdon H335 | <<locked>> | 80% | 35,578 psi | 74% | 2769 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,192 psi | 51% | 1699 fps | 100% |
| IMR 3031 | 25.8 gr | 82% | 29,617 psi | 62% | 2671 fps | 95.9% |
| IMR 4198 | <<locked>> | 80% | 37,782 psi | 79% | 2759 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 38,870 psi | 81% | 2822 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 88% | 35,099 psi | 73% | 2785 fps | 95.2% |
| Norma 202 | <<locked>> | 86% | 34,345 psi | 72% | 2740 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,859 psi | 50% | 1732 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 37,434 psi | 78% | 2789 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 40,321 psi | 84% | 2956 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 82% | 33,301 psi | 70% | 2677 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 88% | 35,099 psi | 73% | 2785 fps | 95.2% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,059 psi | 82% | 2844 fps | 97.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,985 psi | 77% | 2776 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 34,476 psi | 72% | 2657 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 29,863 psi | 62% | 2556 fps | 95.1% |
| Somchem S335 | <<locked>> | 82% | 31,720 psi | 66% | 2605 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 34,751 psi | 73% | 2674 fps | 99% |
| Vihtavuori N133 | <<locked>> | 80% | 30,197 psi | 63% | 2569 fps | 97% |
| Vihtavuori N135 | <<locked>> | 80% | 25,135 psi | 53% | 2500 fps | 95% |
| Vihtavuori N140 | <<locked>> | 86% | 32,619 psi | 68% | 2674 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 88% | 33,243 psi | 69% | 2700 fps | 95.1% |
| Winchester 748 | <<locked>> | 88% | 38,841 psi | 81% | 2877 fps | 95.4% |
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 35 powders for 6 x 52 R BB2 loaded with the .243 | 75gr | Peregrine VLR-4. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,022 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 35 of the 35 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 75.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, ReloadSwiss RS 60 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, Accurate 2495 rank at the top here: for 6 x 52 R BB2 with the .243 | 75gr | Peregrine VLR-4 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.