Load Specifications
Load data in caliber 6.5 x 52 R K&S with .263 | 150gr | Rhino Solid Shank bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 and Alliant Reloder-17.
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% | 41,858 psi | 89% | 2241 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 42,134 psi | 89% | 2280 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 40,335 psi | 86% | 2323 fps | 98% |
| ADI AR 2208 | <<locked>> | 84% | 41,046 psi | 87% | 2251 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,278 psi | 88% | 2369 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 40,611 psi | 86% | 2270 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 82% | 41,075 psi | 87% | 2283 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,205 psi | 85% | 2329 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 40,103 psi | 85% | 2356 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,651 psi | 78% | 2293 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,205 psi | 85% | 2418 fps | 97.5% |
| Bofors RP3 | <<locked>> | 84% | 40,161 psi | 85% | 2274 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 84% | 41,423 psi | 88% | 2283 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,945 psi | 89% | 2323 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,597 psi | 88% | 2323 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,404 psi | 75% | 1463 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,495 psi | 86% | 2231 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 41,466 psi | 88% | 2326 fps | 98.3% |
| IMR 4895 | <<locked>> | 82% | 42,032 psi | 89% | 2310 fps | 99.2% |
| Lovex S062 | <<locked>> | 82% | 40,524 psi | 86% | 2238 fps | 99.6% |
| Lovex S065 | <<locked>> | 90% | 42,482 psi | 90% | 2280 fps | 97% |
| Lovex S070 | <<locked>> | 92% | 42,612 psi | 90% | 2300 fps | 95.9% |
| Norma 203B | <<locked>> | 82% | 40,393 psi | 86% | 2274 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 40,379 psi | 86% | 2320 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 82% | 39,813 psi | 84% | 2283 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 94% | 42,192 psi | 90% | 2356 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 76% | 1496 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,669 psi | 88% | 2264 fps | 96% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 39,871 psi | 85% | 2359 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,103 psi | 85% | 2343 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,205 psi | 85% | 2349 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 82% | 42,264 psi | 90% | 2247 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 86% | 40,451 psi | 86% | 2274 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,482 psi | 90% | 2280 fps | 97% |
| Shooters World Precision | <<locked>> | 82% | 40,524 psi | 86% | 2238 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 92% | 42,612 psi | 90% | 2300 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 41,423 psi | 88% | 2320 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 40,785 psi | 87% | 2175 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 41,408 psi | 88% | 2280 fps | 99.3% |
| Somchem S365 | <<locked>> | 96% | 40,930 psi | 87% | 2369 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 41,829 psi | 89% | 2231 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,569 psi | 90% | 2244 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,945 psi | 89% | 2260 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 42,467 psi | 90% | 2320 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 40,698 psi | 86% | 2234 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 41,640 psi | 88% | 2323 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,595 psi | 84% | 2359 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,598 psi | 90% | 2303 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,532 psi | 69% | 2280 fps | 98.1% |
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% | 39,276 psi | 83% | 2201 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,130 psi | 79% | 2195 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,706 psi | 69% | 2175 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,289 psi | 77% | 2159 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,783 psi | 82% | 2320 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,810 psi | 76% | 2182 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,580 psi | 82% | 2238 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 31,575 psi | 67% | 2139 fps | 95% |
| Alliant Reloder-17 | 30.1 gr | 80% | 30,879 psi | 66% | 2156 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,848 psi | 61% | 2106 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,186 psi | 75% | 2310 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 35,331 psi | 75% | 2185 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 80% | 36,230 psi | 77% | 2185 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,093 psi | 57% | 2008 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,059 psi | 83% | 2280 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 56% | 1306 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,087 psi | 81% | 2188 fps | 98% |
| IMR 4831 | <<locked>> | 86% | 31,879 psi | 68% | 2139 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,508 psi | 84% | 2264 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 38,058 psi | 81% | 2195 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 37,637 psi | 80% | 2192 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 40,118 psi | 85% | 2257 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 37,956 psi | 81% | 2228 fps | 98.5% |
| Norma URP | <<locked>> | 86% | 33,446 psi | 71% | 2182 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 37,420 psi | 79% | 2241 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 92% | 39,784 psi | 84% | 2313 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 57% | 1339 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,276 psi | 83% | 2221 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,909 psi | 70% | 2211 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,692 psi | 69% | 2192 fps | 95.2% |
| ReloadSwiss RS 70 | 33.6 gr | 88% | 35,346 psi | 75% | 2247 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 40,118 psi | 85% | 2211 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 33,344 psi | 71% | 2139 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,637 psi | 80% | 2192 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 38,058 psi | 81% | 2195 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 40,118 psi | 85% | 2257 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,156 psi | 72% | 2178 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,911 psi | 76% | 2093 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 34,345 psi | 73% | 2146 fps | 98% |
| Somchem S365 | 28.5 gr | 80% | 24,714 psi | 52% | 1995 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 39,175 psi | 83% | 2192 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,987 psi | 85% | 2201 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,576 psi | 69% | 2090 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 32,779 psi | 70% | 2136 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 38,305 psi | 81% | 2195 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,242 psi | 68% | 2139 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 30,487 psi | 65% | 2169 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,950 psi | 61% | 2028 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,660 psi | 61% | 2169 fps | 95.8% |
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 49 powders for 6.5 x 52 R K&S loaded with the .263 | 150gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 2,418 fps; across all powders the maximum-charge window runs from 1,463 fps to 2,418 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.263" calls for a 1:9.5 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. Somchem S365, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 6.5 x 52 R K&S with the .263 | 150gr | Rhino Solid Shank 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.