Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 144gr | Sierra MatchKing bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and ReloadSwiss RS 62.
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>> | 84% | 42,496 psi | 90% | 2300 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 40,103 psi | 85% | 2297 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 40,828 psi | 87% | 2379 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 86% | 42,264 psi | 90% | 2313 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,395 psi | 90% | 2431 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,655 psi | 88% | 2336 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,148 psi | 89% | 2346 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,278 psi | 88% | 2392 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,147 psi | 87% | 2418 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,969 psi | 74% | 2297 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,638 psi | 82% | 2425 fps | 96.3% |
| Bofors RP3 | <<locked>> | 86% | 41,133 psi | 87% | 2339 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 86% | 42,525 psi | 90% | 2349 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 40,030 psi | 85% | 2333 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 42,641 psi | 90% | 2388 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 74% | 1486 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 41,713 psi | 88% | 2297 fps | 98.4% |
| IMR 4831 | <<locked>> | 96% | 42,032 psi | 89% | 2382 fps | 98% |
| IMR 4895 | <<locked>> | 82% | 40,538 psi | 86% | 2329 fps | 98.6% |
| Lovex S062 | <<locked>> | 84% | 41,597 psi | 88% | 2303 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 40,712 psi | 86% | 2290 fps | 96% |
| Norma 203B | <<locked>> | 84% | 41,466 psi | 88% | 2336 fps | 98.8% |
| Norma URP | <<locked>> | 94% | 41,321 psi | 88% | 2379 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 84% | 40,770 psi | 86% | 2346 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 76% | 1526 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,075 psi | 87% | 2385 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 40,901 psi | 87% | 2421 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,944 psi | 87% | 2402 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,307 psi | 88% | 2408 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 82% | 40,857 psi | 87% | 2270 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 88% | 41,408 psi | 88% | 2336 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,712 psi | 86% | 2290 fps | 96% |
| Shooters World Precision | <<locked>> | 84% | 41,597 psi | 88% | 2303 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,438 psi | 90% | 2382 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,250 psi | 90% | 2329 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 41,698 psi | 88% | 2234 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,105 psi | 89% | 2336 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 41,901 psi | 89% | 2431 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 84% | 42,583 psi | 90% | 2293 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 40,741 psi | 86% | 2260 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 40,451 psi | 86% | 2283 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 40,524 psi | 86% | 2329 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 41,814 psi | 89% | 2300 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,583 psi | 90% | 2385 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,478 psi | 80% | 2365 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 40,843 psi | 87% | 2316 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,343 psi | 66% | 2277 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 41,814 psi | 89% | 2336 fps | 99.2% |
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 2495 | <<locked>> | 80% | 37,318 psi | 79% | 2218 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,317 psi | 75% | 2211 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,388 psi | 71% | 2234 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 35,070 psi | 74% | 2178 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,101 psi | 79% | 2326 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,490 psi | 73% | 2198 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,217 psi | 79% | 2254 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,432 psi | 73% | 2247 fps | 95.6% |
| Alliant Reloder-17 | 29.9 gr | 80% | 29,559 psi | 63% | 2159 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,254 psi | 62% | 2156 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 35,998 psi | 76% | 2365 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 33,939 psi | 72% | 2201 fps | 98% |
| Hodgdon H380 | <<locked>> | 80% | 34,911 psi | 74% | 2201 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,544 psi | 63% | 2110 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,289 psi | 79% | 2290 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 55% | 1325 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,796 psi | 78% | 2208 fps | 97.3% |
| IMR 4831 | <<locked>> | 88% | 32,561 psi | 69% | 2198 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 38,072 psi | 81% | 2283 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 36,724 psi | 78% | 2215 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 38,319 psi | 81% | 2247 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 36,608 psi | 78% | 2244 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 34,229 psi | 73% | 2238 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,737 psi | 76% | 2251 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,411 psi | 56% | 1358 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,450 psi | 82% | 2336 fps | 97.7% |
| ReloadSwiss RS 60 | 29.9 gr | 80% | 31,488 psi | 67% | 2218 fps | 98.7% |
| ReloadSwiss RS 62 | 33.7 gr | 90% | 35,853 psi | 76% | 2303 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,856 psi | 82% | 2359 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 38,435 psi | 82% | 2224 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 31,705 psi | 67% | 2146 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,319 psi | 81% | 2247 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 36,724 psi | 78% | 2215 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,909 psi | 70% | 2195 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,769 psi | 84% | 2283 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,679 psi | 74% | 2116 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 32,779 psi | 70% | 2156 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 26,890 psi | 57% | 2096 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 37,695 psi | 80% | 2215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,232 psi | 81% | 2218 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,067 psi | 66% | 2103 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 33,576 psi | 71% | 2192 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 36,970 psi | 78% | 2215 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,070 psi | 74% | 2244 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 31,038 psi | 66% | 2221 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,704 psi | 63% | 2083 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,298 psi | 62% | 2218 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,928 psi | 83% | 2283 fps | 98.7% |
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 48 powders for 6.5 x 52 R K&S loaded with the .264 | 144gr | Sierra MatchKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,431 fps; across all powders the maximum-charge window runs from 1,486 fps to 2,431 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 144.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 6.5 x 52 R K&S with the .264 | 144gr | Sierra MatchKing 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.