Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 140gr | Sierra MatchKing bullet and 46 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% | 42,540 psi | 90% | 2343 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 40,118 psi | 85% | 2339 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 40,886 psi | 87% | 2421 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 86% | 42,235 psi | 90% | 2356 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,554 psi | 90% | 2477 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,568 psi | 88% | 2375 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,090 psi | 89% | 2388 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,017 psi | 87% | 2428 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,176 psi | 87% | 2461 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,925 psi | 74% | 2333 fps | 97.3% |
| Bofors RP3 | <<locked>> | 86% | 41,350 psi | 88% | 2385 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 42,366 psi | 90% | 2385 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 42,612 psi | 90% | 2421 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 39,972 psi | 85% | 2382 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,085 psi | 74% | 1519 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 41,742 psi | 89% | 2339 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 42,032 psi | 89% | 2421 fps | 97.8% |
| IMR 4895 | <<locked>> | 82% | 40,567 psi | 86% | 2369 fps | 98.5% |
| Lovex S062 | <<locked>> | 84% | 41,626 psi | 88% | 2346 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 40,915 psi | 87% | 2336 fps | 95.9% |
| Norma 203B | <<locked>> | 84% | 41,408 psi | 88% | 2375 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 41,379 psi | 88% | 2421 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 84% | 40,930 psi | 87% | 2392 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,346 psi | 75% | 1552 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 40,988 psi | 87% | 2428 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,002 psi | 87% | 2467 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,872 psi | 87% | 2441 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,510 psi | 88% | 2454 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 82% | 40,959 psi | 87% | 2313 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 88% | 41,292 psi | 88% | 2375 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,915 psi | 87% | 2336 fps | 95.9% |
| Shooters World Precision | <<locked>> | 84% | 41,626 psi | 88% | 2346 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,569 psi | 90% | 2428 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,221 psi | 90% | 2369 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 41,742 psi | 89% | 2277 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 41,974 psi | 89% | 2375 fps | 99% |
| Somchem S365 | <<locked>> | 98% | 41,785 psi | 89% | 2470 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 84% | 42,656 psi | 90% | 2336 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 40,785 psi | 87% | 2303 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 40,335 psi | 86% | 2323 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 92% | 40,625 psi | 86% | 2372 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 42,076 psi | 89% | 2346 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,569 psi | 90% | 2425 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,434 psi | 79% | 2402 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,089 psi | 87% | 2359 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 82% | 41,727 psi | 89% | 2375 fps | 99.1% |
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% | 37,463 psi | 79% | 2260 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,418 psi | 75% | 2251 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,228 psi | 70% | 2267 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 35,201 psi | 75% | 2218 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,057 psi | 79% | 2365 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,287 psi | 73% | 2234 fps | 97.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,941 psi | 78% | 2287 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,345 psi | 73% | 2283 fps | 95.3% |
| Alliant Reloder-17 | 30.7 gr | 80% | 29,747 psi | 63% | 2198 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,082 psi | 66% | 2238 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 33,678 psi | 71% | 2234 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 80% | 34,911 psi | 74% | 2241 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,530 psi | 63% | 2146 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,260 psi | 79% | 2329 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 55% | 1352 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,941 psi | 78% | 2247 fps | 97.1% |
| IMR 4831 | <<locked>> | 90% | 34,824 psi | 74% | 2283 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 37,811 psi | 80% | 2316 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 36,506 psi | 77% | 2251 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 38,218 psi | 81% | 2283 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 36,332 psi | 77% | 2280 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 34,127 psi | 72% | 2277 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 35,694 psi | 76% | 2287 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 56% | 1385 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,450 psi | 82% | 2379 fps | 97.5% |
| ReloadSwiss RS 60 | 30.7 gr | 80% | 31,705 psi | 67% | 2260 fps | 98.6% |
| ReloadSwiss RS 62 | 34.4 gr | 90% | 35,534 psi | 75% | 2333 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,769 psi | 82% | 2395 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 38,566 psi | 82% | 2270 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 31,792 psi | 67% | 2185 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,218 psi | 81% | 2283 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 36,506 psi | 77% | 2251 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,924 psi | 70% | 2231 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,769 psi | 84% | 2323 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,548 psi | 73% | 2152 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 32,866 psi | 70% | 2195 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 26,861 psi | 57% | 2133 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 37,507 psi | 80% | 2254 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,319 psi | 81% | 2260 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,140 psi | 66% | 2139 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 88% | 35,607 psi | 76% | 2274 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,014 psi | 79% | 2257 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 34,882 psi | 74% | 2277 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 33,040 psi | 70% | 2306 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,602 psi | 63% | 2113 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,914 psi | 83% | 2323 fps | 98.6% |
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 46 powders for 6.5 x 52 R K&S loaded with the .264 | 140gr | Sierra MatchKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,477 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,477 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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 | 140gr | 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.