Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 160gr | Sierra SP SemiSp bullet and 45 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Alliant Reloder-16.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100ᴾ | <<locked>> | 100% | 41,843 psi | 89% | 2274 fps | 97.6% |
| Accurate 4350 | <<locked>> | 90% | 41,611 psi | 88% | 2280 fps | 99% |
| ADI AR 2208 | <<locked>> | 82% | 41,684 psi | 88% | 2198 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 41,481 psi | 88% | 2221 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 41,263 psi | 88% | 2290 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 86% | 40,930 psi | 87% | 2310 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,972 psi | 85% | 2300 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,331 psi | 75% | 2215 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,640 psi | 88% | 2392 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 41,205 psi | 87% | 2228 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 42,076 psi | 89% | 2205 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 82% | 41,872 psi | 89% | 2231 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 88% | 41,379 psi | 88% | 2274 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 40,625 psi | 86% | 2238 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 76% | 1430 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 41,872 psi | 89% | 2224 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,857 psi | 87% | 2185 fps | 96.1% |
| IMR 4831 | <<locked>> | 92% | 42,540 psi | 90% | 2280 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 40,698 psi | 86% | 2188 fps | 97.5% |
| Lovex S070 | <<locked>> | 88% | 40,886 psi | 87% | 2211 fps | 96.5% |
| Norma MRP | <<locked>> | 98% | 41,582 psi | 88% | 2349 fps | 96.3% |
| Norma URP | <<locked>> | 90% | 41,727 psi | 89% | 2277 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 90% | 40,495 psi | 86% | 2267 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,100 psi | 77% | 1463 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,366 psi | 90% | 2218 fps | 97.3% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 40,683 psi | 86% | 2306 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,220 psi | 87% | 2300 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,133 psi | 87% | 2313 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 84% | 41,452 psi | 88% | 2224 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 86% | 42,076 psi | 89% | 2205 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,698 psi | 86% | 2188 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 88% | 40,886 psi | 87% | 2211 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 42,380 psi | 90% | 2270 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 41,046 psi | 87% | 2113 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,885 psi | 85% | 2139 fps | 96% |
| Somchem S355 | <<locked>> | 84% | 41,930 psi | 89% | 2221 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 42,351 psi | 90% | 2326 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 42,061 psi | 89% | 2267 fps | 96% |
| Vihtavuori N150 | <<locked>> | 84% | 40,205 psi | 85% | 2169 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 40,828 psi | 87% | 2231 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 90% | 42,554 psi | 90% | 2274 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 98% | 41,336 psi | 88% | 2320 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 40,625 psi | 86% | 2215 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 41,756 psi | 89% | 2280 fps | 96.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,752 psi | 76% | 2316 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>> | 94% | 34,185 psi | 73% | 2136 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 29,530 psi | 63% | 2044 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 39,247 psi | 83% | 2156 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,044 psi | 83% | 2178 fps | 99.7% |
| Alliant Reloder-16 | 28.7 gr | 80% | 30,327 psi | 64% | 2060 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,576 psi | 71% | 2162 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,310 psi | 56% | 1988 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,330 psi | 71% | 2169 fps | 95% |
| Alliant Reloder-26 | 35.6 gr | 90% | 31,618 psi | 67% | 2175 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 38,711 psi | 82% | 2185 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 39,320 psi | 83% | 2156 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 39,407 psi | 84% | 2188 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 38,972 psi | 83% | 2231 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,804 psi | 59% | 1975 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 56% | 1273 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 39,494 psi | 84% | 2185 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 82% | 38,522 psi | 82% | 2142 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 29,066 psi | 62% | 2018 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 33,808 psi | 72% | 2057 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 36,289 psi | 77% | 2126 fps | 95.1% |
| Norma MRP | <<locked>> | 96% | 39,160 psi | 83% | 2303 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 30,124 psi | 64% | 2047 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 86% | 35,694 psi | 76% | 2175 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,977 psi | 57% | 1306 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,624 psi | 84% | 2169 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,737 psi | 76% | 2215 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 29,573 psi | 63% | 2060 fps | 95% |
| ReloadSwiss RS 70 | 32.9 gr | 84% | 33,620 psi | 71% | 2156 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 36,274 psi | 77% | 2136 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 39,320 psi | 83% | 2156 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,808 psi | 72% | 2057 fps | 95.5% |
| Shooters World SW4350 | <<locked>> | 84% | 36,289 psi | 77% | 2126 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,202 psi | 79% | 2178 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,595 psi | 82% | 2077 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,521 psi | 80% | 2100 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 37,115 psi | 79% | 2139 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 27,064 psi | 57% | 2011 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 39,581 psi | 84% | 2224 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 35,244 psi | 75% | 2083 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 31,343 psi | 66% | 2047 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 30,951 psi | 66% | 2051 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 27,949 psi | 59% | 2047 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,212 psi | 66% | 2031 fps | 98% |
| Winchester 760 | <<locked>> | 84% | 36,680 psi | 78% | 2185 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,107 psi | 55% | 2051 fps | 95.9% |
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 45 powders for 6.5 x 52 R K&S loaded with the .264 | 160gr | Sierra SP SemiSp. Alliant Reloder-26 delivers the highest muzzle velocity at 2,392 fps; across all powders the maximum-charge window runs from 1,430 fps to 2,392 fps. Accurate 3100 gives the best case fill at 100 %, and 45 of the 45 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.264" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for 6.5 x 52 R K&S with the .264 | 160gr | Sierra SP SemiSp 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.