Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 140gr | Speer IRB bullet and 47 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 2495 | <<locked>> | 82% | 40,466 psi | 86% | 2313 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 40,669 psi | 86% | 2352 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 41,698 psi | 88% | 2441 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 86% | 42,641 psi | 90% | 2369 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,408 psi | 86% | 2441 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,047 psi | 89% | 2388 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,569 psi | 90% | 2402 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,713 psi | 88% | 2448 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,800 psi | 89% | 2477 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,462 psi | 75% | 2352 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,117 psi | 83% | 2480 fps | 96.4% |
| Bofors RP3 | <<locked>> | 86% | 41,858 psi | 89% | 2398 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 40,248 psi | 85% | 2352 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 40,770 psi | 86% | 2392 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,422 psi | 86% | 2395 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,259 psi | 75% | 1526 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,192 psi | 90% | 2352 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 40,176 psi | 85% | 2395 fps | 97.5% |
| IMR 4895 | <<locked>> | 82% | 41,060 psi | 87% | 2382 fps | 98.7% |
| Lovex S062 | <<locked>> | 84% | 42,076 psi | 89% | 2359 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 41,292 psi | 88% | 2346 fps | 96.1% |
| Norma 203B | <<locked>> | 84% | 41,887 psi | 89% | 2392 fps | 98.8% |
| Norma URP | <<locked>> | 94% | 41,771 psi | 89% | 2434 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 84% | 41,684 psi | 88% | 2408 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,520 psi | 75% | 1562 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,916 psi | 89% | 2448 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,669 psi | 88% | 2484 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,524 psi | 88% | 2457 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,047 psi | 89% | 2470 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 41,495 psi | 88% | 2326 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 88% | 41,727 psi | 89% | 2388 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,292 psi | 88% | 2346 fps | 96.1% |
| Shooters World Precision | <<locked>> | 84% | 42,076 psi | 89% | 2359 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,466 psi | 86% | 2395 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,192 psi | 90% | 2290 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 40,321 psi | 86% | 2352 fps | 98.8% |
| Somchem S365 | <<locked>> | 98% | 42,496 psi | 90% | 2490 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 40,596 psi | 86% | 2310 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,263 psi | 88% | 2316 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 40,727 psi | 86% | 2333 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 41,336 psi | 88% | 2392 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 42,482 psi | 90% | 2356 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 40,379 psi | 86% | 2392 fps | 97% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,087 psi | 81% | 2421 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,626 psi | 88% | 2375 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,821 psi | 68% | 2336 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,148 psi | 89% | 2388 fps | 99.2% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 38,043 psi | 81% | 2274 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,940 psi | 76% | 2267 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,011 psi | 72% | 2290 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,650 psi | 76% | 2234 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,782 psi | 80% | 2385 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,041 psi | 74% | 2254 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,434 psi | 79% | 2303 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,969 psi | 74% | 2303 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,095 psi | 64% | 2215 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,834 psi | 63% | 2211 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,477 psi | 77% | 2421 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 34,447 psi | 73% | 2257 fps | 98% |
| Hodgdon H380 | <<locked>> | 80% | 35,375 psi | 75% | 2254 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,892 psi | 63% | 2159 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,029 psi | 81% | 2349 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 56% | 1362 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,405 psi | 79% | 2264 fps | 97.3% |
| IMR 4831 | <<locked>> | 88% | 33,141 psi | 70% | 2251 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 38,305 psi | 81% | 2329 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 36,985 psi | 78% | 2264 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 38,928 psi | 83% | 2303 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 36,796 psi | 78% | 2293 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 34,534 psi | 73% | 2290 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 36,361 psi | 77% | 2306 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 56% | 1398 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,986 psi | 83% | 2395 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,039 psi | 68% | 2277 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,069 psi | 72% | 2306 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,349 psi | 83% | 2418 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,059 psi | 83% | 2283 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 32,285 psi | 68% | 2201 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,928 psi | 83% | 2303 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 36,985 psi | 78% | 2264 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,286 psi | 71% | 2244 fps | 96.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,041 psi | 74% | 2165 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,344 psi | 71% | 2211 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 25,628 psi | 54% | 2100 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 38,116 psi | 81% | 2267 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,841 psi | 82% | 2274 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,560 psi | 67% | 2152 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 34,185 psi | 73% | 2247 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 37,434 psi | 79% | 2267 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,534 psi | 75% | 2297 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 31,459 psi | 67% | 2274 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,095 psi | 64% | 2133 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,791 psi | 63% | 2274 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,320 psi | 83% | 2336 fps | 98.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 72 powders for 6.5 x 52 R K&S loaded with the .264 | 140gr | Speer IRB. Somchem S365 delivers the highest muzzle velocity at 2,490 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,490 fps. Accurate 3100 gives the best case fill at 100 %, and 72 of the 72 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, Accurate 2700, Accurate 3100, ADI AR 2209 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.