Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 156gr | RWS Evolution bullet and 44 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Somchem S365 and ReloadSwiss RS 70.
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 3100ᴾ | <<locked>> | 100% | 40,030 psi | 85% | 2267 fps | 96.8% |
| Accurate 4064 | <<locked>> | 82% | 41,495 psi | 88% | 2228 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 40,103 psi | 85% | 2280 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 40,524 psi | 86% | 2201 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 40,219 psi | 85% | 2224 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,206 psi | 90% | 2329 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,177 psi | 89% | 2356 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,479 psi | 82% | 2293 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,059 psi | 85% | 2382 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 42,424 psi | 90% | 2274 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 82% | 40,625 psi | 86% | 2231 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,524 psi | 88% | 2277 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 76% | 1444 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,554 psi | 90% | 2231 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,569 psi | 90% | 2238 fps | 96.1% |
| IMR 4831 | <<locked>> | 92% | 41,191 psi | 87% | 2283 fps | 98.7% |
| Lovex S062 | <<locked>> | 82% | 42,612 psi | 90% | 2234 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 42,003 psi | 89% | 2234 fps | 97.5% |
| Lovex S070 | <<locked>> | 90% | 42,134 psi | 89% | 2257 fps | 96.4% |
| Norma 203B | <<locked>> | 82% | 42,569 psi | 90% | 2270 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 42,598 psi | 90% | 2316 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 41,974 psi | 89% | 2283 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 41,713 psi | 88% | 2313 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,027 psi | 76% | 1476 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,220 psi | 87% | 2221 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,308 psi | 90% | 2362 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,409 psi | 90% | 2343 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,467 psi | 90% | 2359 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 84% | 40,132 psi | 85% | 2228 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,003 psi | 89% | 2234 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 42,612 psi | 90% | 2234 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 42,134 psi | 89% | 2257 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 41,060 psi | 87% | 2274 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,453 psi | 90% | 2159 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,191 psi | 87% | 2185 fps | 95.9% |
| Somchem S355 | <<locked>> | 84% | 40,640 psi | 86% | 2228 fps | 99.5% |
| Somchem S365 | <<locked>> | 94% | 40,973 psi | 87% | 2329 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,481 psi | 88% | 2215 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 42,047 psi | 89% | 2274 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 90% | 41,263 psi | 88% | 2277 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,061 psi | 89% | 2359 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,930 psi | 89% | 2257 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 40,118 psi | 85% | 2274 fps | 95.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,432 psi | 73% | 2303 fps | 99.4% |
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 3100 | <<locked>> | 96% | 35,128 psi | 75% | 2178 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 39,030 psi | 83% | 2185 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,603 psi | 65% | 2090 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,116 psi | 81% | 2159 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,797 psi | 80% | 2182 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,256 psi | 66% | 2103 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,561 psi | 69% | 2162 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,035 psi | 57% | 2028 fps | 95.4% |
| Alliant Reloder-26 | 36 gr | 92% | 32,518 psi | 69% | 2218 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 37,449 psi | 79% | 2185 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,218 psi | 81% | 2188 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,890 psi | 57% | 1972 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 56% | 1286 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,030 psi | 85% | 2188 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 39,798 psi | 84% | 2185 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 29,849 psi | 63% | 2057 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 39,740 psi | 84% | 2185 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 34,809 psi | 74% | 2100 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 37,362 psi | 79% | 2169 fps | 95% |
| Norma 203B | <<locked>> | 80% | 39,682 psi | 84% | 2221 fps | 99.2% |
| Norma URP | <<locked>> | 82% | 30,966 psi | 66% | 2090 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,117 psi | 83% | 2234 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 36,738 psi | 78% | 2218 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 57% | 1316 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,493 psi | 82% | 2172 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,635 psi | 73% | 2218 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,532 psi | 69% | 2152 fps | 95.9% |
| ReloadSwiss RS 70 | 33.4 gr | 86% | 34,954 psi | 74% | 2208 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 35,056 psi | 74% | 2136 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,809 psi | 74% | 2100 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 39,740 psi | 84% | 2185 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 37,362 psi | 79% | 2169 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,027 psi | 76% | 2182 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,782 psi | 80% | 2087 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,725 psi | 82% | 2142 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 35,940 psi | 76% | 2139 fps | 98.8% |
| Somchem S365 | 29 gr | 80% | 26,150 psi | 55% | 2008 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 34,113 psi | 72% | 2087 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 30,327 psi | 64% | 2044 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 82% | 31,821 psi | 68% | 2093 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 28,631 psi | 61% | 2087 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,356 psi | 64% | 2031 fps | 97.3% |
| Winchester 760 | <<locked>> | 86% | 37,768 psi | 80% | 2231 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,818 psi | 57% | 2087 fps | 95.7% |
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 44 powders for 6.5 x 52 R K&S loaded with the .264 | 156gr | RWS Evolution. Alliant Reloder-26 delivers the highest muzzle velocity at 2,382 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,382 fps. Accurate 3100 gives the best case fill at 100 %, and 44 of the 44 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.264" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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 Reloder-26, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 6.5 x 52 R K&S with the .264 | 156gr | RWS Evolution 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.