Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 65gr | Berger ND bullet and 31 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>> | 90% | 43,120 psi | 90% | 3087 fps | 99.3% |
| Accurate 2460 | <<locked>> | 86% | 41,640 psi | 87% | 3071 fps | 96.5% |
| Accurate 2495 | <<locked>> | 96% | 41,278 psi | 86% | 3107 fps | 99.3% |
| Accurate 2520 | <<locked>> | 90% | 42,003 psi | 88% | 3114 fps | 96.2% |
| Accurate 4064 | <<locked>> | 98% | 41,249 psi | 86% | 3127 fps | 97.3% |
| Accurate LT-30 | <<locked>> | 82% | 42,888 psi | 90% | 3005 fps | 98.2% |
| Accurate LT-32 | <<locked>> | 82% | 43,279 psi | 90% | 3015 fps | 96.4% |
| ADI AR 2219 | <<locked>> | 82% | 40,582 psi | 85% | 3081 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 92% | 42,525 psi | 89% | 3173 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 40,727 psi | 85% | 3064 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 41,408 psi | 87% | 2979 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 86% | 42,598 psi | 89% | 3127 fps | 98% |
| Hodgdon H335 | <<locked>> | 86% | 43,192 psi | 90% | 3130 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,663 psi | 68% | 2057 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 40,567 psi | 85% | 3143 fps | 98.3% |
| IMR 4198 | <<locked>> | 84% | 42,264 psi | 88% | 3058 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 94% | 43,018 psi | 90% | 3146 fps | 96.5% |
| Norma 202 | <<locked>> | 92% | 41,568 psi | 87% | 3097 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,532 psi | 68% | 2103 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 42,656 psi | 89% | 3087 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 94% | 43,018 psi | 90% | 3146 fps | 96.5% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 41,539 psi | 87% | 3091 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 41,510 psi | 87% | 3074 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 41,611 psi | 87% | 3002 fps | 96.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 43,018 psi | 90% | 3045 fps | 98.1% |
| Somchem S335 | <<locked>> | 92% | 43,178 psi | 90% | 3054 fps | 98% |
| Vihtavuori N130 | <<locked>> | 86% | 41,698 psi | 87% | 3018 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 90% | 41,162 psi | 86% | 3015 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 96% | 42,395 psi | 89% | 3127 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 94% | 41,684 psi | 87% | 3071 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 96% | 43,192 psi | 90% | 3110 fps | 97.1% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 31,372 psi | 66% | 2805 fps | 96.3% |
| Accurate 2460 | <<locked>> | 84% | 38,986 psi | 81% | 3009 fps | 95.7% |
| Accurate 2495 | <<locked>> | 84% | 27,543 psi | 58% | 2756 fps | 95.1% |
| Accurate 2520 | <<locked>> | 88% | 39,233 psi | 82% | 3051 fps | 95.4% |
| Accurate 4064 | <<locked>> | 94% | 36,332 psi | 76% | 3009 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 40,205 psi | 84% | 2946 fps | 97.6% |
| Accurate LT-32 | <<locked>> | 80% | 40,567 psi | 85% | 2953 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 37,913 psi | 79% | 3022 fps | 96.8% |
| Alliant AR-Comp | <<locked>> | 80% | 28,674 psi | 60% | 2815 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 35,911 psi | 75% | 2949 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,609 psi | 81% | 2917 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 34,795 psi | 73% | 2940 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 82% | 37,884 psi | 79% | 3012 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,192 psi | 51% | 1850 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 31,212 psi | 65% | 2897 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 37,246 psi | 78% | 2946 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 92% | 40,161 psi | 84% | 3084 fps | 95.6% |
| Norma 202 | <<locked>> | 88% | 36,405 psi | 76% | 2972 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,207 psi | 51% | 1893 fps | 100% |
| Rottweil R 901 | <<locked>> | 86% | 37,898 psi | 79% | 2976 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 92% | 40,161 psi | 84% | 3084 fps | 95.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,566 psi | 81% | 3018 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,506 psi | 76% | 2956 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 36,724 psi | 77% | 2890 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 33,518 psi | 70% | 2825 fps | 95.3% |
| Somchem S335 | <<locked>> | 84% | 33,692 psi | 70% | 2835 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 34,461 psi | 72% | 2851 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 80% | 29,979 psi | 63% | 2736 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 84% | 28,514 psi | 60% | 2776 fps | 95.3% |
| Vihtavuori N140 | <<locked>> | 90% | 36,550 psi | 76% | 2949 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 92% | 37,942 psi | 79% | 2995 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 67 powders for 6 x 52 R BB2 loaded with the .243 | 65gr | Berger ND. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,192 fps; across all powders the maximum-charge window runs from 2,057 fps to 3,192 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 67 of the 67 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 65.0 gr projectile in 0.243" calls for a 1:11.5 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. As outliers, ADI AR 2206H, ADI Benchmark 8208, Alliant Power Pro 1200-R burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.