Load Specifications
Load data in caliber .356 Win. with .358 | 180gr | Alaska Bullet Works Kodiak SP SPBC bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, Alliant Reloder-7 and ReloadSwiss RS 36.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 92% | 45,963 psi | 88% | 2375 fps | 97.5% |
| Accurate 5744 | <<locked>> | 82% | 46,905 psi | 90% | 2405 fps | 98.5% |
| ADI AR 2205 | <<locked>> | 84% | 46,963 psi | 90% | 2303 fps | 100% |
| ADI AR 2207 | <<locked>> | 98% | 46,485 psi | 89% | 2474 fps | 99.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 40,553 psi | 78% | 2395 fps | 96.6% |
| Alliant Reloder-7 | <<locked>> | 96% | 46,427 psi | 89% | 2428 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,617 psi | 57% | 1470 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 44,208 psi | 85% | 2402 fps | 98.2% |
| IMR 4227 | <<locked>> | 90% | 45,977 psi | 88% | 2375 fps | 99.4% |
| Lovex D060 | <<locked>> | 82% | 44,425 psi | 85% | 2362 fps | 98.1% |
| Lovex D063 | <<locked>> | 82% | 44,222 psi | 85% | 2339 fps | 98.6% |
| Lovex S053 | <<locked>> | 92% | 46,992 psi | 90% | 2382 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 46,137 psi | 89% | 2477 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,225 psi | 56% | 1506 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 44,773 psi | 86% | 2395 fps | 99.2% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 44,425 psi | 85% | 2362 fps | 98.1% |
| Shooters World SOCOM | <<locked>> | 82% | 44,222 psi | 85% | 2339 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 45,643 psi | 88% | 2241 fps | 100% |
| Vihtavuori N110 | <<locked>> | 86% | 46,702 psi | 90% | 2313 fps | 100% |
| Vihtavuori N120 | <<locked>> | 98% | 46,702 psi | 90% | 2438 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 39,755 psi | 76% | 2320 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 86% | 37,869 psi | 73% | 2241 fps | 95.5% |
| Accurate 5744 | <<locked>> | 80% | 44,425 psi | 85% | 2362 fps | 98.1% |
| ADI AR 2205 | <<locked>> | 80% | 41,727 psi | 80% | 2224 fps | 100% |
| ADI AR 2207 | 30.2 gr | 80% | 26,803 psi | 52% | 2087 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 96% | 35,636 psi | 69% | 2303 fps | 95.2% |
| Alliant Reloder-7 | 33.6 gr | 86% | 34,243 psi | 66% | 2211 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,727 psi | 42% | 1312 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 33,576 psi | 65% | 2195 fps | 95.2% |
| IMR 4227 | <<locked>> | 80% | 34,084 psi | 66% | 2162 fps | 97.2% |
| Lovex D060 | <<locked>> | 80% | 42,090 psi | 81% | 2320 fps | 97.6% |
| Lovex D063 | <<locked>> | 80% | 41,553 psi | 80% | 2293 fps | 98.1% |
| Lovex S053 | <<locked>> | 80% | 33,199 psi | 64% | 2149 fps | 99.5% |
| Norma 200 | <<locked>> | 90% | 33,678 psi | 65% | 2254 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,321 psi | 41% | 1342 fps | 100% |
| ReloadSwiss RS 36 | 31.4 gr | 80% | 32,953 psi | 63% | 2178 fps | 96.7% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 42,090 psi | 81% | 2320 fps | 97.6% |
| Shooters World SOCOM | <<locked>> | 80% | 41,553 psi | 80% | 2293 fps | 98.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 31,618 psi | 61% | 2021 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 39,189 psi | 75% | 2205 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 27,180 psi | 52% | 2070 fps | 97.5% |
| Vihtavuori N130 | <<locked>> | 98% | 37,347 psi | 72% | 2274 fps | 95.2% |
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 21 powders for .356 Win. loaded with the .358 | 180gr | Alaska Bullet Works Kodiak SP SPBC. Norma 200 delivers the highest muzzle velocity at 2,477 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,477 fps. Alliant Reloder-10x gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (359 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. Alliant Reloder-10x, Hodgdon TrailBoss, IMR 4198 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. ADI AR 2207, Alliant Reloder-7, ReloadSwiss RS 36 rank at the top here: for .356 Win. with the .358 | 180gr | Alaska Bullet Works Kodiak SP SPBC 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.