Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 159gr | RWS TMR bullet and 43 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 and Vihtavuori N555.
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 3100 | <<locked>> | 98% | 39,929 psi | 85% | 2257 fps | 97.2% |
| Accurate 4350 | <<locked>> | 90% | 42,554 psi | 90% | 2310 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 82% | 42,337 psi | 90% | 2228 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,177 psi | 89% | 2247 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 41,742 psi | 89% | 2316 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 41,727 psi | 89% | 2339 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,959 psi | 87% | 2333 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,085 psi | 77% | 2247 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,496 psi | 90% | 2425 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 41,887 psi | 89% | 2251 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 42,641 psi | 90% | 2231 fps | 96.2% |
| Hodgdon H414 | <<locked>> | 88% | 42,206 psi | 90% | 2303 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 41,437 psi | 88% | 2267 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 41,887 psi | 89% | 2323 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 76% | 1444 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,756 psi | 89% | 2218 fps | 96.4% |
| IMR 4831 | <<locked>> | 90% | 40,872 psi | 87% | 2267 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 41,278 psi | 88% | 2215 fps | 97.8% |
| Lovex S070 | <<locked>> | 88% | 41,742 psi | 89% | 2241 fps | 96.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,868 psi | 76% | 2182 fps | 96.1% |
| Norma MRP | <<locked>> | 96% | 40,045 psi | 85% | 2339 fps | 96% |
| Norma URP | <<locked>> | 90% | 42,641 psi | 90% | 2310 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 41,220 psi | 87% | 2297 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,158 psi | 77% | 1476 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 41,510 psi | 88% | 2339 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,409 psi | 90% | 2333 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,742 psi | 89% | 2343 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 84% | 42,119 psi | 89% | 2251 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 42,641 psi | 90% | 2231 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,278 psi | 88% | 2215 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 88% | 41,742 psi | 89% | 2241 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 40,480 psi | 86% | 2254 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 41,771 psi | 89% | 2139 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,712 psi | 86% | 2169 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 40,147 psi | 85% | 2208 fps | 99.7% |
| Somchem S365 | <<locked>> | 92% | 40,683 psi | 86% | 2313 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 40,814 psi | 87% | 2195 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 41,698 psi | 88% | 2260 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 40,901 psi | 87% | 2264 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 98% | 42,206 psi | 90% | 2349 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 41,249 psi | 88% | 2238 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 42,583 psi | 90% | 2310 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,477 psi | 77% | 2352 fps | 99.9% |
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>> | 92% | 32,837 psi | 70% | 2123 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 30,458 psi | 65% | 2077 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 80% | 39,914 psi | 85% | 2185 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,769 psi | 84% | 2205 fps | 99.8% |
| Alliant Reloder-16 | 29.4 gr | 80% | 30,893 psi | 66% | 2087 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,113 psi | 72% | 2188 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,716 psi | 57% | 2014 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,837 psi | 72% | 2195 fps | 95.4% |
| Alliant Reloder-26 | 35.7 gr | 88% | 30,342 psi | 64% | 2159 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 39,407 psi | 84% | 2211 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 40,219 psi | 85% | 2188 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 84% | 37,173 psi | 79% | 2211 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,355 psi | 60% | 2005 fps | 97% |
| Hodgdon Superformance | <<locked>> | 86% | 38,899 psi | 83% | 2267 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 57% | 1289 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,073 psi | 83% | 2169 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 29,660 psi | 63% | 2044 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 34,418 psi | 73% | 2083 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 36,883 psi | 78% | 2152 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 33,388 psi | 71% | 2133 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 37,463 psi | 79% | 2287 fps | 95% |
| Norma URP | <<locked>> | 80% | 30,705 psi | 65% | 2073 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 84% | 34,127 psi | 72% | 2156 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 58% | 1322 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,289 psi | 77% | 2241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,081 psi | 64% | 2087 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 32,097 psi | 68% | 2136 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 36,999 psi | 78% | 2162 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 40,219 psi | 85% | 2188 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,418 psi | 73% | 2083 fps | 95.8% |
| Shooters World SW4350 | <<locked>> | 84% | 36,883 psi | 78% | 2152 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,826 psi | 80% | 2205 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,305 psi | 83% | 2103 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,014 psi | 81% | 2123 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 37,811 psi | 80% | 2165 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 27,615 psi | 59% | 2041 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 35,882 psi | 76% | 2110 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 32,184 psi | 68% | 2080 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 80% | 31,517 psi | 67% | 2080 fps | 95.9% |
| Vihtavuori N555 | 31 gr | 84% | 26,789 psi | 57% | 2031 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,836 psi | 68% | 2060 fps | 98.3% |
| Winchester 760 | <<locked>> | 84% | 37,173 psi | 79% | 2211 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,150 psi | 53% | 2034 fps | 95.3% |
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 43 powders for 6.5 x 52 R K&S loaded with the .264 | 159gr | RWS TMR. Alliant Reloder-26 delivers the highest muzzle velocity at 2,425 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,425 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 43 of the 43 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 76–90 %, leaving at least 10 % headroom. The 159.0 gr projectile in 0.264" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, 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, Alliant Reloder-16, Vihtavuori N555 rank at the top here: for 6.5 x 52 R K&S with the .264 | 159gr | RWS TMR 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.