Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338-06 A-Square load data
Case Length (l3):2.494"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:69 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,091 psi
Recommended Twist Rate:1:15.0
Load data in caliber .338-06 A-Square with .338 | 250gr | Rhino Solid Shank bullet and 105 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, Hodgdon CFE223 and Ramshot Big Game.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 56,202 psi | 89% | 2306 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 56,304 psi | 89% | 2392 fps | 99.6% |
| Accurate 2460 | <<locked>> | 86% | 54,752 psi | 87% | 2333 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 56,695 psi | 90% | 2359 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 55,956 psi | 89% | 2382 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 54,288 psi | 86% | 2316 fps | 96% |
| Accurate 4064 | <<locked>> | 98% | 56,115 psi | 89% | 2395 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,933 psi | 71% | 2323 fps | 98% |
| Accurate LT-30 | <<locked>> | 84% | 56,072 psi | 89% | 2257 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,550 psi | 90% | 2280 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 54,868 psi | 87% | 2388 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 98% | 55,651 psi | 88% | 2382 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 84% | 56,594 psi | 90% | 2362 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,389 psi | 86% | 2352 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 54,128 psi | 86% | 2329 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,927 psi | 89% | 2438 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,099 psi | 86% | 2484 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 54,940 psi | 87% | 2402 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,057 psi | 89% | 2310 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 55,941 psi | 89% | 2421 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,078 psi | 71% | 2329 fps | 98.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,909 psi | 82% | 2457 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,027 psi | 87% | 2260 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 54,447 psi | 86% | 2402 fps | 99.3% |
| Bofors RP3 | <<locked>> | 98% | 55,390 psi | 88% | 2418 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 52,895 psi | 84% | 2339 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 90% | 56,695 psi | 90% | 2336 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 56,478 psi | 90% | 2421 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 54,897 psi | 87% | 2461 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 86% | 55,216 psi | 88% | 2349 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 56,289 psi | 89% | 2375 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 56,913 psi | 90% | 2425 fps | 99.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,588 psi | 77% | 2365 fps | 96% |
| Hodgdon H4895 | <<locked>> | 92% | 55,361 psi | 88% | 2398 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,307 psi | 65% | 2234 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 53,780 psi | 85% | 2425 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,780 psi | 55% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,884 psi | 90% | 2398 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 54,549 psi | 86% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,245 psi | 88% | 2369 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,115 psi | 89% | 2352 fps | 97.2% |
| IMR 4198 | <<locked>> | 86% | 56,681 psi | 90% | 2274 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 54,897 psi | 87% | 2369 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,917 psi | 68% | 2277 fps | 97.7% |
| IMR 4895 | <<locked>> | 94% | 53,969 psi | 86% | 2408 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 54,389 psi | 86% | 2352 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 54,607 psi | 87% | 2343 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 54,041 psi | 86% | 2372 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,216 psi | 88% | 2326 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 54,911 psi | 87% | 2369 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,299 psi | 80% | 2316 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,747 psi | 76% | 2300 fps | 96% |
| Norma 200 | <<locked>> | 82% | 56,217 psi | 89% | 2287 fps | 100% |
| Norma 201 | <<locked>> | 94% | 57,072 psi | 90% | 2382 fps | 100% |
| Norma 202 | <<locked>> | 92% | 54,230 psi | 86% | 2349 fps | 100% |
| Norma 203B | <<locked>> | 96% | 54,998 psi | 87% | 2411 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 45,078 psi | 71% | 2320 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 96% | 55,245 psi | 88% | 2434 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2310 fps | 95.8% |
| Ramshot TAC | <<locked>> | 90% | 54,766 psi | 87% | 2365 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,969 psi | 86% | 2385 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,651 psi | 88% | 2356 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,012 psi | 55% | 1421 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,201 psi | 86% | 2339 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 54,143 psi | 86% | 2365 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 55,709 psi | 88% | 2477 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 55,477 psi | 88% | 2510 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,556 psi | 71% | 2339 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,905 psi | 73% | 2356 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 90% | 55,056 psi | 87% | 2329 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 54,027 psi | 86% | 2339 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,882 psi | 87% | 2405 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 52,895 psi | 84% | 2339 fps | 96.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,299 psi | 80% | 2316 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 54,041 psi | 86% | 2372 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 54,911 psi | 87% | 2369 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,747 psi | 76% | 2300 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 53,998 psi | 86% | 2313 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,652 psi | 90% | 2037 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 57,043 psi | 90% | 2375 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 56,724 psi | 90% | 2457 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 57,043 psi | 90% | 2326 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 56,536 psi | 90% | 2392 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 56,637 psi | 90% | 2408 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,260 psi | 89% | 2297 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 55,521 psi | 88% | 2290 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 2280 fps | 96.2% |
| Somchem S321 | <<locked>> | 88% | 55,506 psi | 88% | 2382 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 54,955 psi | 87% | 2293 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 55,738 psi | 88% | 2382 fps | 99.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,492 psi | 88% | 2402 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,176 psi | 64% | 2277 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 88% | 55,941 psi | 89% | 2264 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,130 psi | 89% | 2283 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 56,463 psi | 89% | 2346 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,375 psi | 86% | 2326 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,766 psi | 85% | 2346 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,645 psi | 76% | 2320 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 90% | 54,940 psi | 87% | 2352 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 56,130 psi | 89% | 2369 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,514 psi | 74% | 2326 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,718 psi | 77% | 2310 fps | 99.6% |
| Winchester 748 | <<locked>> | 90% | 54,099 psi | 86% | 2392 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 2369 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 94% | 56,463 psi | 89% | 2418 fps | 100% |
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% | 41,524 psi | 66% | 2123 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,939 psi | 84% | 2346 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 44,773 psi | 71% | 2208 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,939 psi | 54% | 2054 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,045 psi | 63% | 2172 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 50,792 psi | 81% | 2270 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 32,097 psi | 51% | 2041 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 33,939 psi | 54% | 2136 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 49,690 psi | 79% | 2182 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,082 psi | 79% | 2201 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,826 psi | 60% | 2129 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 34,374 psi | 54% | 2051 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 49,719 psi | 79% | 2280 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,798 psi | 63% | 2139 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 38,885 psi | 62% | 2139 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,006 psi | 73% | 2300 fps | 99.5% |
| Alliant Power Pro 2000-MR | 45 gr | 82% | 36,361 psi | 58% | 2185 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,372 psi | 50% | 2024 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,833 psi | 74% | 2198 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,808 psi | 54% | 2073 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,549 psi | 56% | 2149 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 84% | 30,806 psi | 49% | 2073 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,617 psi | 77% | 2185 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,738 psi | 58% | 2129 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 30,574 psi | 48% | 2024 fps | 96.5% |
| Bofors RP7 | <<locked>> | 98% | 49,763 psi | 79% | 2297 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,974 psi | 67% | 2136 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,782 psi | 60% | 2156 fps | 99.1% |
| Hodgdon CFE223 | 45 gr | 80% | 41,640 psi | 66% | 2267 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 45,498 psi | 72% | 2224 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,195 psi | 73% | 2247 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 36,303 psi | 58% | 2116 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 98% | 45,426 psi | 72% | 2320 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 38,087 psi | 60% | 2139 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,458 psi | 48% | 2021 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,127 psi | 54% | 2113 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,802 psi | 41% | 1237 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,796 psi | 58% | 2103 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 37,217 psi | 59% | 2146 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,837 psi | 54% | 2034 fps | 95.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,760 psi | 74% | 2224 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 47,587 psi | 75% | 2165 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 45,992 psi | 73% | 2241 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 35,636 psi | 56% | 2149 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 34,548 psi | 55% | 2096 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 80% | 39,798 psi | 63% | 2139 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 44,672 psi | 71% | 2215 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 36,201 psi | 57% | 2116 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 38,667 psi | 61% | 2083 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 33,547 psi | 53% | 2041 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 39,610 psi | 63% | 2152 fps | 95.1% |
| Lovex S070 | <<locked>> | 98% | 44,976 psi | 71% | 2257 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 52,939 psi | 84% | 2251 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,333 psi | 59% | 2096 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 37,289 psi | 59% | 2110 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 33,170 psi | 53% | 2064 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 35,085 psi | 56% | 2142 fps | 95.1% |
| Ramshot Big Game | 43.9 gr | 80% | 32,619 psi | 52% | 2070 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 98% | 41,814 psi | 66% | 2264 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 39,784 psi | 63% | 2139 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,841 psi | 62% | 2159 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,134 psi | 68% | 2182 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,092 psi | 41% | 1270 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,933 psi | 71% | 2215 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 44,759 psi | 71% | 2234 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 34,838 psi | 55% | 2149 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,022 psi | 46% | 2037 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,666 psi | 58% | 2201 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,234 psi | 64% | 2254 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 41,031 psi | 65% | 2136 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,520 psi | 56% | 2057 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 28,805 psi | 46% | 1975 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 98% | 49,763 psi | 79% | 2297 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 39,610 psi | 63% | 2152 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,201 psi | 57% | 2116 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 33,547 psi | 53% | 2041 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 44,976 psi | 71% | 2257 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,181 psi | 75% | 2224 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,983 psi | 86% | 2011 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,082 psi | 79% | 2293 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,097 psi | 51% | 2064 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,572 psi | 75% | 2211 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,768 psi | 60% | 2116 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,434 psi | 58% | 2106 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,928 psi | 62% | 2064 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,952 psi | 51% | 1955 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,210 psi | 75% | 2234 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 42,699 psi | 68% | 2208 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 38,508 psi | 61% | 2070 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,405 psi | 59% | 2116 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 30,052 psi | 48% | 1988 fps | 95.6% |
| Somchem S365 | <<locked>> | 88% | 27,644 psi | 44% | 2008 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 44,164 psi | 70% | 2123 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,015 psi | 62% | 2064 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,316 psi | 54% | 2051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,186 psi | 56% | 2054 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 28,340 psi | 45% | 1936 fps | 96.5% |
| Vihtavuori N160 | <<locked>> | 92% | 36,840 psi | 58% | 2142 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 39,813 psi | 63% | 2139 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 33,707 psi | 53% | 2044 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 36,027 psi | 57% | 2149 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,937 psi | 49% | 1998 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 38,740 psi | 61% | 2175 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 45,745 psi | 73% | 2323 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,534 psi | 56% | 2106 fps | 97.5% |
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 105 powders for .338-06 A-Square loaded with the .338 | 250gr | Rhino Solid Shank. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,510 fps; across all powders the maximum-charge window runs from 1,388 fps to 2,510 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, Hodgdon CFE223, Ramshot Big Game rank at the top here: for .338-06 A-Square with the .338 | 250gr | 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.