Load Specifications
Load data in caliber 9.3 x 62 with .366 | 255gr | Geco EXPRESS bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon CFE223.
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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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 2015 | <<locked>> | 92% | 50,778 psi | 90% | 2379 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 48,515 psi | 86% | 2398 fps | 97% |
| Accurate 2230 | <<locked>> | 82% | 48,762 psi | 86% | 2411 fps | 97.4% |
| Accurate 2460 | <<locked>> | 88% | 49,110 psi | 87% | 2395 fps | 99.9% |
| Accurate 2495 | <<locked>> | 98% | 49,661 psi | 88% | 2425 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 48,051 psi | 85% | 2428 fps | 99.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 49,110 psi | 87% | 2451 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 49,458 psi | 87% | 2300 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 49,850 psi | 88% | 2316 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 94% | 49,661 psi | 88% | 2438 fps | 98% |
| ADI AR 2207 | <<locked>> | 82% | 50,299 psi | 89% | 2323 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 50,618 psi | 89% | 2431 fps | 97.5% |
| ADI AR 2219 | <<locked>> | 84% | 48,225 psi | 85% | 2395 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 49,472 psi | 87% | 2408 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 94% | 50,908 psi | 90% | 2444 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 50,328 psi | 89% | 2493 fps | 98.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 49,139 psi | 87% | 2516 fps | 96.8% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 48,791 psi | 86% | 2448 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 48,167 psi | 85% | 2352 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 49,995 psi | 88% | 2464 fps | 97.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 43,613 psi | 77% | 2431 fps | 97% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 50,995 psi | 90% | 2339 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 49,066 psi | 87% | 2444 fps | 96.8% |
| Bofors RP3ᴾ | <<locked>> | 100% | 48,704 psi | 86% | 2457 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 90% | 49,226 psi | 87% | 2362 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 94% | 50,444 psi | 89% | 2474 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 90% | 49,008 psi | 87% | 2500 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 90% | 49,342 psi | 87% | 2411 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 50,865 psi | 90% | 2441 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 50,937 psi | 90% | 2464 fps | 96.4% |
| Hodgdon H4198 | <<locked>> | 84% | 50,995 psi | 90% | 2336 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 49,951 psi | 88% | 2448 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 47,993 psi | 85% | 2467 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,765 psi | 60% | 1447 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 50,299 psi | 89% | 2434 fps | 98.5% |
| IMR 3031 | <<locked>> | 98% | 49,690 psi | 88% | 2467 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 49,052 psi | 87% | 2402 fps | 97.4% |
| IMR 4198 | <<locked>> | 86% | 49,226 psi | 87% | 2323 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 48,167 psi | 85% | 2451 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 92% | 49,472 psi | 87% | 2408 fps | 98.9% |
| Lovex D073.4 | <<locked>> | 82% | 49,458 psi | 87% | 2402 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 88% | 49,197 psi | 87% | 2402 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 94% | 47,819 psi | 85% | 2425 fps | 99.7% |
| Lovex S060 | <<locked>> | 94% | 51,010 psi | 90% | 2385 fps | 98.2% |
| Lovex S062 | <<locked>> | 98% | 49,081 psi | 87% | 2418 fps | 99% |
| Norma 200 | <<locked>> | 82% | 48,240 psi | 85% | 2329 fps | 100% |
| Norma 201 | <<locked>> | 94% | 48,660 psi | 86% | 2398 fps | 98.9% |
| Norma 202 | <<locked>> | 94% | 48,733 psi | 86% | 2411 fps | 99.9% |
| Norma 203B | <<locked>> | 98% | 49,081 psi | 87% | 2454 fps | 98% |
| Ramshot Big Game | <<locked>> | 98% | 49,559 psi | 88% | 2477 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 92% | 48,602 psi | 86% | 2431 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 90% | 51,082 psi | 90% | 2411 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,968 psi | 60% | 1483 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 49,487 psi | 87% | 2402 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 49,342 psi | 87% | 2516 fps | 97.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 46,615 psi | 82% | 2497 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 92% | 49,980 psi | 88% | 2395 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 96% | 48,805 psi | 86% | 2392 fps | 98.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 45,049 psi | 80% | 2395 fps | 97.9% |
| Shooters World AR Plus | <<locked>> | 82% | 49,458 psi | 87% | 2402 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 94% | 47,819 psi | 85% | 2425 fps | 99.7% |
| Shooters World Precision | <<locked>> | 98% | 49,081 psi | 87% | 2418 fps | 99% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 49,676 psi | 88% | 2375 fps | 98.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 50,981 psi | 90% | 2106 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 48,660 psi | 86% | 2402 fps | 99.9% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 47,558 psi | 84% | 2451 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 48,994 psi | 87% | 2365 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 50,792 psi | 90% | 2428 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 48,182 psi | 85% | 2415 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 48,544 psi | 86% | 2326 fps | 99.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 50,314 psi | 89% | 2359 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 50,459 psi | 89% | 2444 fps | 99.3% |
| Somchem S335 | <<locked>> | 94% | 50,154 psi | 89% | 2365 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 50,154 psi | 89% | 2428 fps | 97.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 46,412 psi | 82% | 2402 fps | 97.9% |
| Vihtavuori N120 | <<locked>> | 84% | 49,821 psi | 88% | 2274 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 50,299 psi | 89% | 2333 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 50,285 psi | 89% | 2349 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 50,212 psi | 89% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 48,196 psi | 85% | 2382 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 39,102 psi | 69% | 2260 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 90% | 49,139 psi | 87% | 2415 fps | 99% |
| Vihtavuori N540 | <<locked>> | 98% | 50,908 psi | 90% | 2448 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 41,336 psi | 73% | 2287 fps | 96.2% |
| Winchester 748 | <<locked>> | 90% | 49,095 psi | 87% | 2457 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 49,269 psi | 87% | 2448 fps | 98.5% |
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 2015 | <<locked>> | 80% | 35,143 psi | 62% | 2139 fps | 99.8% |
| Accurate 2200 | <<locked>> | 80% | 45,600 psi | 81% | 2352 fps | 96.3% |
| Accurate 2230 | <<locked>> | 80% | 45,295 psi | 80% | 2356 fps | 96.7% |
| Accurate 2460 | <<locked>> | 80% | 37,840 psi | 67% | 2218 fps | 98.7% |
| Accurate 2495 | <<locked>> | 80% | 27,601 psi | 49% | 2047 fps | 98.9% |
| Accurate 2520 | <<locked>> | 80% | 31,647 psi | 56% | 2142 fps | 96.7% |
| Accurate 4064 | <<locked>> | 80% | 26,165 psi | 46% | 2021 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 80% | 43,801 psi | 77% | 2221 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 80% | 44,179 psi | 78% | 2231 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 86% | 38,870 psi | 69% | 2257 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 47,253 psi | 84% | 2283 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 42,308 psi | 75% | 2300 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 42,308 psi | 75% | 2306 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,171 psi | 60% | 2142 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 32,314 psi | 57% | 2159 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 38,856 psi | 69% | 2303 fps | 96.4% |
| Alliant Power Pro 2000-MR | 55.8 gr | 92% | 42,888 psi | 76% | 2405 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 33,562 psi | 59% | 2182 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,190 psi | 71% | 2234 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,073 psi | 69% | 2283 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 96% | 38,319 psi | 68% | 2329 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,119 psi | 74% | 2215 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 43,178 psi | 76% | 2349 fps | 95.4% |
| Bofors RP3 | <<locked>> | 90% | 34,838 psi | 62% | 2224 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,521 psi | 65% | 2149 fps | 96.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,430 psi | 56% | 2142 fps | 95.3% |
| Hodgdon CFE223 | 52.2 gr | 84% | 40,074 psi | 71% | 2346 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 80% | 35,766 psi | 63% | 2192 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 80% | 41,263 psi | 73% | 2297 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 98% | 47,558 psi | 84% | 2415 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 45,397 psi | 80% | 2257 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 84% | 36,825 psi | 65% | 2224 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 34,925 psi | 62% | 2231 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,077 psi | 44% | 1293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,173 psi | 66% | 2218 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 28,398 psi | 50% | 2083 fps | 98.1% |
| IMR 4064 | <<locked>> | 94% | 41,133 psi | 73% | 2274 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 41,452 psi | 73% | 2211 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 37,318 psi | 66% | 2264 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 34,171 psi | 60% | 2142 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 45,919 psi | 81% | 2352 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 37,449 psi | 66% | 2211 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 80% | 29,878 psi | 53% | 2103 fps | 96.1% |
| Lovex S060 | <<locked>> | 84% | 38,043 psi | 67% | 2175 fps | 95.2% |
| Lovex S062 | <<locked>> | 86% | 34,142 psi | 60% | 2162 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 45,368 psi | 80% | 2290 fps | 100% |
| Norma 201 | <<locked>> | 82% | 33,663 psi | 60% | 2136 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 31,328 psi | 55% | 2106 fps | 97.3% |
| Norma 203B | <<locked>> | 90% | 38,276 psi | 68% | 2274 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 92% | 40,640 psi | 72% | 2329 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 39,784 psi | 70% | 2287 fps | 95.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 39,668 psi | 70% | 2228 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,179 psi | 45% | 1322 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,392 psi | 68% | 2224 fps | 98.2% |
| ReloadSwiss RS 52 | 52.9 gr | 90% | 40,292 psi | 71% | 2362 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 31,720 psi | 56% | 2188 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 35,143 psi | 62% | 2146 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 84% | 33,968 psi | 60% | 2133 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 92% | 34,780 psi | 61% | 2215 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 45,919 psi | 81% | 2352 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,878 psi | 53% | 2103 fps | 96.1% |
| Shooters World Precision | <<locked>> | 86% | 34,142 psi | 60% | 2162 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,437 psi | 71% | 2231 fps | 96.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 48,501 psi | 86% | 2077 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 42,670 psi | 75% | 2310 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 39,421 psi | 70% | 2313 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,770 psi | 72% | 2244 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 47,500 psi | 84% | 2382 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 37,376 psi | 66% | 2231 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,562 psi | 59% | 2077 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,166 psi | 48% | 1959 fps | 96.8% |
| Somchem S321 | <<locked>> | 80% | 35,984 psi | 64% | 2205 fps | 96.5% |
| Somchem S335 | <<locked>> | 80% | 32,909 psi | 58% | 2080 fps | 98.4% |
| Somchem S341 | <<locked>> | 86% | 38,406 psi | 68% | 2241 fps | 95.2% |
| Somchem S355 | <<locked>> | 92% | 36,376 psi | 64% | 2228 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 44,280 psi | 78% | 2201 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 37,463 psi | 66% | 2146 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 31,270 psi | 55% | 2044 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 80% | 28,427 psi | 50% | 2054 fps | 98.9% |
| Vihtavuori N140 | <<locked>> | 80% | 29,298 psi | 52% | 2047 fps | 97% |
| Vihtavuori N150 | <<locked>> | 94% | 32,634 psi | 58% | 2136 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 35,592 psi | 63% | 2182 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 80% | 28,935 psi | 51% | 2057 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 38,812 psi | 69% | 2241 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 34,882 psi | 62% | 2215 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,043 psi | 65% | 2244 fps | 95.7% |
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 86 powders for 9.3 x 62 loaded with the .366 | 255gr | Geco EXPRESS. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,516 fps; across all powders the maximum-charge window runs from 1,447 fps to 2,516 fps. Accurate 4064 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 255.0 gr projectile in 0.366" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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 Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for 9.3 x 62 with the .366 | 255gr | Geco EXPRESS 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.