Load data for 9.3 x 57 + .366 | 250gr | Geco STAR
Recommended Powder(s): Accurate 4064, IMR 3031, Vihtavuori N540
Load Specifications
(Use the Personalized Load Calculator below to adjust )
Bullet: | .366 | 250gr | Geco STAR |
Manufacturer SKU: | 2426916 |
Bullet Weight: | 250gr | 16.2g |
Bullet Diameter: | 0.366" | 9.30mm |
Bullet Length: | 1.000" | 25.4mm |
Caliber: | 9.3 x 57 load data |
Case Length (l3): | 2.224" | 56.5mm |
Cartridge Length (C.O.L.): | 3.180" | 80.8mm |
Seated Depth: | 0.044" | 1.1mm |
Shank Seated Depth: | -0.074" | -1.9mm |
Case Capacity: | 63.0 Grains of Water | 4.09 cm³ |
Primer Size: | Large Rifle (LR) |
Max. allowed Pressure: | 43511 psi | 3000 bar |
LID: | LID_B10951_C1256 |
Last updated: | 2025-08-22 |
Recommended Twist Rate: | 1:24 - 1:20 |
Load data for 106 loads in caliber 9.3 x 57 with .366 | 250gr | Geco STAR bullet and 53 powders such as Accurate 4064, IMR 3031, Vihtavuori N540. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge unless there are reasons. Since xxlreloading.com has no control over the equipment and components used by the customer and the data used in connection with the website, any responsibility and liability for the results achieved is rejected. Also see our Terms of Service.
Questions regarding the load data: Please read the information in the next tab "Explanations".
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A load must fulfill certain criteria to be listed in the default view below - see "powder criteria to fulfill to be listed".
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Our load data might deviate from other sources - see the "most common reasons for deviations".
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All loads are based on the bullet and case dimensions shown under "Load Specifications" - see "reloading suggestions" if you deviate.
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Our default view only displays powders/loads that fulfill certain criteria: Max pressure of a load <=90% of Max. Standardized Pressure. Fill Rate (Min FR): >80% and <100% for rife loads, >60% and <100% for pistol loads. Min. Propellant Combustion (Min z): >90% for rifle loads , >80% for pistol/revolver loads. Relax these criteria at your own risk to potentially get more powders shown in the load tables.
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Click on the desired row in the tables below to add a specific load / powder to your Diary and manage there.
Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
ADI AR 2206H | <<locked>> | 86% | 38450 | 88% | **70 | 95% |
[ADI AR 2208]* | <<locked>> | 91% | 38841 | 89% | **57 | 94% |
[Accurate 2200]* | <<locked>> | 84% | 38522 | 89% | **28 | 93% |
Accurate 2495 | <<locked>> | 87% | 38392 | 88% | **00 | 100% |
Accurate 2520 | <<locked>> | 86% | 38464 | 88% | **00 | 98% |
Accurate 4064 👍 | <<locked>> | 93% | 38725 | 89% | **13 | 99% |
Alliant AR-Comp | <<locked>> | 86% | 38638 | 89% | **97 | 100% |
Alliant Reloder- TS 15.5 | <<locked>> | 93% | 39146 | 90% | **10 | 97% |
Alliant Reloder-15 | <<locked>> | 90% | 39160 | 90% | **00 | 95% |
Alliant Reloder-17 | <<locked>> | 96% | 38740 | 89% | **56 | 95% |
[Baschieri & Pellagri 107]* | <<locked>> | 87% | 39059 | 90% | **93 | 94% |
Hodgdon BL-C2 | <<locked>> | 86% | 39044 | 90% | **20 | 97% |
[Hodgdon CFE223]* | <<locked>> | 91% | 38798 | 89% | **16 | 93% |
[Hodgdon H380]* | <<locked>> | 92% | 38508 | 89% | **80 | 93% |
[Hodgdon Hybrid 100V]* | <<locked>> | 97% | 31328 | 72% | **39 | 92% |
[Hodgdon VARGET]* | <<locked>> | 91% | 38334 | 88% | **47 | 94% |
IMR 3031 👍 | <<locked>> | 90% | 39001 | 90% | **29 | 100% |
[IMR 4064]* | <<locked>> | 92% | 38711 | 89% | **47 | 94% |
IMR 4895 | <<locked>> | 90% | 39131 | 90% | **16 | 95% |
IMR 8208 XBR | <<locked>> | 84% | 38754 | 89% | **51 | 97% |
Lovex D073.6 | <<locked>> | 88% | 38870 | 89% | **06 | 98% |
Lovex S060 | <<locked>> | 85% | 38914 | 89% | **08 | 95% |
Lovex S062 | <<locked>> | 90% | 38885 | 89% | **74 | 97% |
Norma 201 | <<locked>> | 87% | 38682 | 89% | **54 | 97% |
Norma 202 | <<locked>> | 87% | 38957 | 90% | **80 | 99% |
Norma 203B | <<locked>> | 91% | 38899 | 89% | **06 | 95% |
Ramshot Big Game | <<locked>> | 91% | 38957 | 90% | **13 | 95% |
[Ramshot TAC]* | <<locked>> | 84% | 38870 | 89% | **41 | 92% |
Ramshot Wild Boar | <<locked>> | 85% | 38667 | 89% | **87 | 95% |
ReloadSwiss RS 52 | <<locked>> | 92% | 39044 | 90% | **49 | 97% |
ReloadSwiss RS 60 | <<locked>> | 97% | 38551 | 89% | **56 | 96% |
Rottweil R 901 | <<locked>> | 83% | 38493 | 88% | **31 | 99% |
Rottweil R 902 | <<locked>> | 88% | 38682 | 89% | **44 | 97% |
Rottweil R 903 | <<locked>> | 95% | 38595 | 89% | **10 | 96% |
SNPE Vectan SP 11 | <<locked>> | 93% | 38653 | 89% | **16 | 95% |
[SNPE Vectan SP 7]* | <<locked>> | 86% | 38696 | 89% | **57 | 92% |
SNPE Vectan SP 9 | <<locked>> | 87% | 38885 | 89% | **80 | 95% |
SNPE Vectan Tubal 3000 | <<locked>> | 85% | 39044 | 90% | **98 | 99% |
SNPE Vectan Tubal 5000 | <<locked>> | 91% | 38319 | 88% | **05 | 99% |
Shooters World Match Rifle | <<locked>> | 88% | 38870 | 89% | **06 | 98% |
Shooters World Precision | <<locked>> | 90% | 38885 | 89% | **74 | 97% |
Somchem S335 | <<locked>> | 85% | 38798 | 89% | **15 | 99% |
Somchem S341 | <<locked>> | 86% | 39001 | 90% | **74 | 95% |
Somchem S355 | <<locked>> | 94% | 38914 | 89% | **93 | 96% |
[Somchem S365]* | <<locked>> | 97% | 30110 | 69% | **69 | 93% |
Vihtavuori N133 | <<locked>> | 88% | 39131 | 90% | **11 | 100% |
Vihtavuori N135 | <<locked>> | 96% | 38914 | 89% | **77 | 100% |
Vihtavuori N140 | <<locked>> | 89% | 38580 | 89% | **57 | 99% |
Vihtavuori N150 | <<locked>> | 97% | 35665 | 82% | **15 | 96% |
[Vihtavuori N160]* | <<locked>> | 97% | 37971 | 87% | **70 | 92% |
Vihtavuori N540 👍 | <<locked>> | 90% | 39117 | 90% | **90 | 99% |
[Vihtavuori N550]* | <<locked>> | 97% | 37405 | 86% | **06 | 92% |
Winchester 6.5 StaBALL | <<locked>> | 97% | 37579 | 86% | **34 | 95% |
Max Load - Barrel Length: 23.60''
Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
[ADI AR 2206H]* | <<locked>> | 81% | 33112 | 76% | **56 | 93% |
[ADI AR 2208]* | <<locked>> | 82% | 29689 | 68% | **60 | 90% |
[Accurate 2200]* | <<locked>> | 81% | 35476 | 82% | **62 | 92% |
Accurate 2495 | <<locked>> | 81% | 32039 | 74% | **75 | 99% |
Accurate 2520 | <<locked>> | 81% | 32721 | 75% | **85 | 97% |
Accurate 4064 | <<locked>> | 81% | 26963 | 62% | **60 | 96% |
Alliant AR-Comp | <<locked>> | 81% | 33373 | 77% | **05 | 100% |
[Alliant Reloder- TS 15.5]* | <<locked>> | 81% | 26948 | 62% | **37 | 91% |
[Alliant Reloder-15]* | <<locked>> | 81% | 29269 | 67% | **90 | 90% |
[Alliant Reloder-17]* | <<locked>> | 88% | 29834 | 69% | **39 | 90% |
[Baschieri & Pellagri 107]* | <<locked>> | 81% | 32039 | 74% | **46 | 91% |
Hodgdon BL-C2 | <<locked>> | 81% | 33025 | 76% | **01 | 95% |
[Hodgdon CFE223]* | <<locked>> | 85% | 32445 | 75% | **78 | 90% |
[Hodgdon H380]* | <<locked>> | 87% | 33011 | 76% | **69 | 90% |
[Hodgdon Hybrid 100V]* | <<locked>> | 94% | 28805 | 66% | **77 | 90% |
[Hodgdon VARGET]* | <<locked>> | 82% | 29530 | 68% | **54 | 90% |
IMR 3031 | <<locked>> | 81% | 29298 | 67% | **26 | 98% |
[IMR 4064]* | <<locked>> | 82% | 28718 | 66% | **34 | 90% |
[IMR 4895]* | <<locked>> | 81% | 29776 | 68% | **16 | 92% |
IMR 8208 XBR | <<locked>> | 81% | 35056 | 81% | **78 | 95% |
Lovex D073.6 | <<locked>> | 81% | 30792 | 71% | **42 | 96% |
[Lovex S060]* | <<locked>> | 81% | 34505 | 79% | **19 | 94% |
[Lovex S062]* | <<locked>> | 81% | 28950 | 67% | **64 | 93% |
Norma 201 | <<locked>> | 81% | 32576 | 75% | **29 | 95% |
Norma 202 | <<locked>> | 81% | 32256 | 74% | **42 | 97% |
[Norma 203B]* | <<locked>> | 81% | 28543 | 66% | **77 | 91% |
[Ramshot Big Game]* | <<locked>> | 82% | 29588 | 68% | **03 | 90% |
[Ramshot TAC]* | <<locked>> | 81% | 35099 | 81% | **69 | 90% |
[Ramshot Wild Boar]* | <<locked>> | 81% | 33852 | 78% | **85 | 93% |
[ReloadSwiss RS 52]* | <<locked>> | 81% | 27340 | 63% | **80 | 92% |
[ReloadSwiss RS 60]* | <<locked>> | 88% | 29211 | 67% | **19 | 90% |
Rottweil R 901 | <<locked>> | 81% | 36143 | 83% | **85 | 98% |
[Rottweil R 902]* | <<locked>> | 81% | 31169 | 72% | **93 | 94% |
[Rottweil R 903]* | <<locked>> | 83% | 25512 | 59% | **11 | 90% |
[SNPE Vectan SP 11]* | <<locked>> | 84% | 28906 | 66% | **93 | 90% |
[SNPE Vectan SP 7]* | <<locked>> | 81% | 33199 | 76% | **42 | 90% |
[SNPE Vectan SP 9]* | <<locked>> | 81% | 31676 | 73% | **26 | 92% |
SNPE Vectan Tubal 3000 | <<locked>> | 81% | 34679 | 80% | **16 | 98% |
SNPE Vectan Tubal 5000 | <<locked>> | 81% | 27949 | 64% | **95 | 97% |
Shooters World Match Rifle | <<locked>> | 81% | 30792 | 71% | **42 | 96% |
[Shooters World Precision]* | <<locked>> | 81% | 28950 | 67% | **64 | 93% |
Somchem S335 | <<locked>> | 81% | 33910 | 78% | **19 | 98% |
[Somchem S341]* | <<locked>> | 81% | 32445 | 75% | **36 | 92% |
[Somchem S355]* | <<locked>> | 82% | 26150 | 60% | **08 | 90% |
[Somchem S365]* | <<locked>> | 92% | 26136 | 60% | **54 | 90% |
Vihtavuori N133 | <<locked>> | 81% | 32184 | 74% | **80 | 99% |
Vihtavuori N135 | <<locked>> | 81% | 24758 | 57% | **72 | 97% |
Vihtavuori N140 | <<locked>> | 81% | 30211 | 69% | **87 | 97% |
[Vihtavuori N150]* | <<locked>> | 83% | 23206 | 53% | **13 | 90% |
[Vihtavuori N160]* | <<locked>> | 93% | 33098 | 76% | **65 | 90% |
Vihtavuori N540 | <<locked>> | 81% | 29834 | 69% | **96 | 96% |
[Vihtavuori N550]* | <<locked>> | 93% | 32721 | 75% | **08 | 90% |
[Winchester 6.5 StaBALL]* | <<locked>> | 89% | 29124 | 67% | **44 | 90% |
Start Load - Barrel Length: 23.60''
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FR ... fill rate of the cartridge in percent
MaxP ... max. pressure of load in psi or bar
% ... max. pressure of load in percent of the maximum allowed pressure for this caliber
V(0) ... muzzle velocity in feet per second (fps) or meters per second (m/s)
z ... powder burnt in percent
[...] *... not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
[...] ²... fill rate low - you might want to consider using a filler to ensure proper ignition.
[...] ᴾ... possible press load - work up slowly to this load while watching for signs of excessive pressure.
👍 ... recommended powder/load for this caliber and bullet combination based on its ballistic performance.
<<locked>>... you need to buy an access license to unlock the data