Load Specifications
Load data in caliber .33 Win. with .338 | 230gr | Nosler CT FailSafe bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Accurate 4064.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 38,696 psi | 87% | 2110 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 39,349 psi | 89% | 2146 fps | 98.8% |
| Accurate 2495 | <<locked>> | 94% | 38,957 psi | 88% | 2182 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 37,478 psi | 85% | 2165 fps | 98.2% |
| Accurate 2520 | <<locked>> | 88% | 37,478 psi | 85% | 2165 fps | 98.2% |
| Accurate 4064 | <<locked>> | 96% | 38,798 psi | 88% | 2201 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 37,739 psi | 85% | 2116 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 88% | 37,840 psi | 86% | 2165 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 37,724 psi | 85% | 2182 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 38,914 psi | 88% | 2188 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 82% | 39,247 psi | 89% | 2123 fps | 100% |
| Bofors RP3 | <<locked>> | 96% | 38,290 psi | 87% | 2195 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 38,101 psi | 86% | 2080 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 88% | 37,217 psi | 84% | 2165 fps | 97% |
| Hodgdon H322 | <<locked>> | 82% | 37,884 psi | 86% | 2136 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 82% | 38,101 psi | 86% | 2146 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 88% | 38,087 psi | 86% | 2152 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 38,682 psi | 87% | 2205 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,373 psi | 75% | 1358 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 39,407 psi | 89% | 2159 fps | 95.9% |
| IMR 3031 | <<locked>> | 90% | 38,435 psi | 87% | 2198 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 37,739 psi | 85% | 2116 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 84% | 39,044 psi | 88% | 2142 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 90% | 37,478 psi | 85% | 2165 fps | 98.2% |
| Lovex S062 | <<locked>> | 94% | 39,682 psi | 90% | 2169 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 39,363 psi | 89% | 2149 fps | 96.9% |
| Norma 202 | <<locked>> | 90% | 39,131 psi | 88% | 2165 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,170 psi | 75% | 1388 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 37,594 psi | 85% | 2113 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 39,697 psi | 90% | 2260 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 86% | 38,595 psi | 87% | 2116 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 92% | 39,682 psi | 90% | 2146 fps | 97% |
| Rottweil R 903 | <<locked>> | 98% | 37,884 psi | 86% | 2178 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 37,478 psi | 85% | 2165 fps | 98.2% |
| Shooters World Precision | <<locked>> | 94% | 39,682 psi | 90% | 2169 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 39,943 psi | 90% | 2119 fps | 96.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 39,943 psi | 90% | 2129 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 39,465 psi | 89% | 2087 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 38,363 psi | 87% | 2090 fps | 99.4% |
| Somchem S321 | <<locked>> | 84% | 37,623 psi | 85% | 2139 fps | 96.7% |
| Somchem S335 | <<locked>> | 88% | 38,638 psi | 87% | 2093 fps | 99.3% |
| Somchem S355 | <<locked>> | 98% | 39,668 psi | 90% | 2192 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 84% | 39,798 psi | 90% | 2087 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 39,117 psi | 88% | 2093 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 37,405 psi | 85% | 2139 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 39,494 psi | 89% | 2152 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 98% | 37,927 psi | 86% | 2139 fps | 97% |
| Vihtavuori N530 | <<locked>> | 86% | 37,579 psi | 85% | 2110 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 92% | 37,724 psi | 85% | 2139 fps | 98.6% |
| Winchester 748 | <<locked>> | 88% | 38,348 psi | 87% | 2182 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 32,068 psi | 72% | 1991 fps | 99.4% |
| Accurate 2460 | <<locked>> | 80% | 34,476 psi | 78% | 2060 fps | 97.8% |
| Accurate 2495 | <<locked>> | 80% | 24,627 psi | 56% | 1900 fps | 97.9% |
| Accurate 2520 | <<locked>> | 80% | 28,514 psi | 64% | 1988 fps | 95.3% |
| Accurate 2520 | <<locked>> | 80% | 28,514 psi | 64% | 1988 fps | 95.3% |
| Accurate 4064 | 34.4 gr | 82% | 24,874 psi | 56% | 1913 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 35,636 psi | 81% | 2077 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 29,399 psi | 66% | 2011 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 35,201 psi | 80% | 2133 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 34,374 psi | 78% | 2106 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,941 psi | 84% | 2083 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 35,708 psi | 81% | 2149 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 33,750 psi | 76% | 1998 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 84% | 32,634 psi | 74% | 2080 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 35,404 psi | 80% | 2090 fps | 99% |
| Hodgdon H335 | <<locked>> | 80% | 35,694 psi | 81% | 2103 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 86% | 35,665 psi | 81% | 2106 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 36,347 psi | 82% | 2159 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,685 psi | 56% | 1211 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,188 psi | 84% | 2116 fps | 95.2% |
| IMR 3031 | 33.2 gr | 80% | 28,210 psi | 64% | 1991 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 84% | 35,636 psi | 81% | 2077 fps | 95.7% |
| Lovex D073.5 | <<locked>> | 80% | 33,924 psi | 77% | 2054 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 82% | 28,718 psi | 65% | 1995 fps | 95.4% |
| Lovex S062 | <<locked>> | 90% | 35,099 psi | 79% | 2087 fps | 95.8% |
| Norma 201 | <<locked>> | 86% | 34,809 psi | 79% | 2064 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 28,645 psi | 65% | 1962 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,627 psi | 56% | 1240 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,215 psi | 80% | 2070 fps | 97.2% |
| ReloadSwiss RS 60 | 41.4 gr | 92% | 32,895 psi | 74% | 2116 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 32,227 psi | 73% | 1995 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 88% | 35,085 psi | 79% | 2064 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 96% | 35,650 psi | 81% | 2139 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 28,718 psi | 65% | 1995 fps | 95.4% |
| Shooters World Precision | <<locked>> | 90% | 35,099 psi | 79% | 2087 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,333 psi | 84% | 2073 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,550 psi | 85% | 2090 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,038 psi | 70% | 1932 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,135 psi | 57% | 1821 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 32,996 psi | 75% | 2051 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 30,269 psi | 68% | 1939 fps | 97.5% |
| Somchem S355 | <<locked>> | 96% | 37,144 psi | 84% | 2149 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 35,346 psi | 80% | 2014 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 30,806 psi | 70% | 1946 fps | 99% |
| Vihtavuori N135 | <<locked>> | 80% | 25,860 psi | 58% | 1909 fps | 98.1% |
| Vihtavuori N140 | <<locked>> | 80% | 27,238 psi | 62% | 1909 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 94% | 33,460 psi | 76% | 2060 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 84% | 35,114 psi | 79% | 2067 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 82% | 27,746 psi | 63% | 1939 fps | 95.5% |
| Winchester 748 | <<locked>> | 82% | 31,604 psi | 71% | 2047 fps | 95.3% |
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 50 powders for .33 Win. loaded with the .338 | 230gr | Nosler CT FailSafe. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,260 fps; across all powders the maximum-charge window runs from 1,358 fps to 2,260 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 230.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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. ReloadSwiss RS 60, IMR 3031, Accurate 4064 rank at the top here: for .33 Win. with the .338 | 230gr | Nosler CT FailSafe 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.