Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 140gr | Swift A-Frame 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-16 and Somchem S365.
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% | 40,422 psi | 86% | 2313 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 40,596 psi | 86% | 2349 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 41,698 psi | 88% | 2438 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 86% | 42,627 psi | 90% | 2365 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,074 psi | 85% | 2431 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,032 psi | 89% | 2385 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,554 psi | 90% | 2398 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,742 psi | 89% | 2444 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,495 psi | 88% | 2470 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,462 psi | 75% | 2349 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,827 psi | 82% | 2474 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 41,800 psi | 89% | 2395 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 39,929 psi | 85% | 2343 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 40,422 psi | 86% | 2385 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,408 psi | 86% | 2392 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,085 psi | 74% | 1522 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,163 psi | 89% | 2349 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 39,842 psi | 85% | 2385 fps | 97.3% |
| IMR 4895 | <<locked>> | 82% | 40,669 psi | 86% | 2375 fps | 98.6% |
| Lovex S062 | <<locked>> | 84% | 41,713 psi | 88% | 2349 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 41,292 psi | 88% | 2346 fps | 96.1% |
| Norma 203B | <<locked>> | 84% | 41,872 psi | 89% | 2388 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 41,756 psi | 89% | 2431 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 84% | 41,307 psi | 88% | 2402 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 76% | 1562 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,495 psi | 88% | 2438 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,321 psi | 88% | 2474 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,162 psi | 87% | 2451 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,785 psi | 89% | 2464 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 82% | 41,075 psi | 87% | 2316 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 88% | 41,742 psi | 89% | 2385 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,292 psi | 88% | 2346 fps | 96.1% |
| Shooters World Precision | <<locked>> | 84% | 41,713 psi | 88% | 2349 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,118 psi | 85% | 2385 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,598 psi | 90% | 2379 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,177 psi | 89% | 2287 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,409 psi | 90% | 2385 fps | 99.1% |
| Somchem S365 | <<locked>> | 98% | 42,163 psi | 89% | 2480 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 40,538 psi | 86% | 2306 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,234 psi | 87% | 2313 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 40,741 psi | 86% | 2329 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 40,973 psi | 87% | 2382 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 42,134 psi | 89% | 2349 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 40,408 psi | 86% | 2388 fps | 97% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,724 psi | 80% | 2411 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,365 psi | 88% | 2369 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,633 psi | 67% | 2326 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,090 psi | 89% | 2385 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% | 37,985 psi | 81% | 2270 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,897 psi | 76% | 2264 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,634 psi | 71% | 2280 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 35,288 psi | 75% | 2224 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,449 psi | 79% | 2375 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,693 psi | 74% | 2244 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,405 psi | 79% | 2300 fps | 97.3% |
| Alliant Reloder-16 | 31.6 gr | 88% | 34,693 psi | 74% | 2293 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,834 psi | 63% | 2205 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,602 psi | 63% | 2201 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,260 psi | 77% | 2415 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 34,084 psi | 72% | 2244 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 80% | 35,041 psi | 74% | 2244 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,834 psi | 63% | 2156 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,710 psi | 80% | 2343 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,034 psi | 55% | 1355 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,014 psi | 79% | 2254 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 32,808 psi | 70% | 2244 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 38,261 psi | 81% | 2326 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 36,941 psi | 78% | 2260 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 38,595 psi | 82% | 2293 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 36,767 psi | 78% | 2290 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 34,490 psi | 73% | 2287 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 36,027 psi | 76% | 2297 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,353 psi | 56% | 1391 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,914 psi | 83% | 2392 fps | 97.7% |
| ReloadSwiss RS 60 | 30.9 gr | 80% | 31,749 psi | 67% | 2267 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,158 psi | 77% | 2349 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,044 psi | 83% | 2408 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 38,696 psi | 82% | 2274 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 32,198 psi | 68% | 2198 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,595 psi | 82% | 2293 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 36,941 psi | 78% | 2260 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,257 psi | 71% | 2244 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,190 psi | 85% | 2333 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,983 psi | 74% | 2162 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,301 psi | 71% | 2208 fps | 97.1% |
| Somchem S365 | 30.8 gr | 84% | 27,166 psi | 58% | 2142 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 38,029 psi | 81% | 2264 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,798 psi | 82% | 2270 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,517 psi | 67% | 2149 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 33,852 psi | 72% | 2238 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 37,101 psi | 79% | 2260 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 35,534 psi | 75% | 2293 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 31,415 psi | 67% | 2270 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,849 psi | 63% | 2123 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,602 psi | 63% | 2264 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,305 psi | 83% | 2336 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 | 140gr | Swift A-Frame. Somchem S365 delivers the highest muzzle velocity at 2,480 fps; across all powders the maximum-charge window runs from 1,522 fps to 2,480 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 67–90 %, 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. 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-16, Somchem S365 rank at the top here: for 6.5 x 52 R K&S with the .264 | 140gr | Swift A-Frame 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.