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:1:13.0
Load data in caliber .338-06 A-Square with .338 | 250gr | Rhino Penetrator bullet and 102 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 ReloadSwiss RS 52.
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>> | 92% | 56,376 psi | 89% | 2283 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,534 psi | 85% | 2323 fps | 99.1% |
| Accurate 2230 | <<locked>> | 82% | 54,273 psi | 86% | 2336 fps | 99.4% |
| Accurate 2460 | <<locked>> | 88% | 54,781 psi | 87% | 2310 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 56,420 psi | 89% | 2333 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 56,304 psi | 89% | 2362 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 55,941 psi | 89% | 2369 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,234 psi | 65% | 2244 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 86% | 57,000 psi | 90% | 2241 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,911 psi | 85% | 2221 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 55,201 psi | 87% | 2362 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 82% | 55,129 psi | 87% | 2215 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,999 psi | 89% | 2356 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 84% | 53,621 psi | 85% | 2303 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 54,607 psi | 87% | 2326 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 54,056 psi | 86% | 2306 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 56,275 psi | 89% | 2415 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,447 psi | 86% | 2454 fps | 99.3% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,766 psi | 87% | 2372 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 88% | 56,579 psi | 90% | 2290 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 55,796 psi | 88% | 2392 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,351 psi | 67% | 2251 fps | 97% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,602 psi | 77% | 2379 fps | 99.5% |
| Alliant Reloder-7 | <<locked>> | 82% | 56,057 psi | 89% | 2231 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 55,753 psi | 88% | 2244 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 54,853 psi | 87% | 2379 fps | 99.1% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,926 psi | 87% | 2385 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,911 psi | 85% | 2277 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 94% | 56,782 psi | 90% | 2398 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 54,853 psi | 87% | 2431 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 88% | 55,390 psi | 88% | 2326 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 56,623 psi | 90% | 2352 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,534 psi | 85% | 2352 fps | 98.4% |
| Hodgdon H4198 | <<locked>> | 82% | 55,535 psi | 88% | 2238 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 55,622 psi | 88% | 2372 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,595 psi | 61% | 2159 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,679 psi | 85% | 2395 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,258 psi | 54% | 1358 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,969 psi | 86% | 2336 fps | 99.8% |
| IMR 3031 | <<locked>> | 94% | 54,636 psi | 87% | 2359 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,376 psi | 88% | 2339 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 96% | 56,739 psi | 90% | 2326 fps | 96.8% |
| IMR 4198 | <<locked>> | 86% | 53,853 psi | 85% | 2218 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 51,895 psi | 82% | 2297 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 39,943 psi | 63% | 2201 fps | 96.5% |
| IMR 4895 | <<locked>> | 96% | 53,940 psi | 85% | 2379 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 92% | 54,607 psi | 87% | 2326 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 54,766 psi | 87% | 2313 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 54,853 psi | 87% | 2320 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 53,925 psi | 85% | 2346 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 55,970 psi | 89% | 2306 fps | 99.7% |
| Lovex S062 | <<locked>> | 98% | 54,882 psi | 87% | 2343 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 47,529 psi | 75% | 2247 fps | 96.6% |
| Norma 200 | <<locked>> | 84% | 56,695 psi | 90% | 2267 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,867 psi | 85% | 2316 fps | 100% |
| Norma 202 | <<locked>> | 94% | 54,346 psi | 86% | 2326 fps | 100% |
| Norma 203B | <<locked>> | 98% | 54,781 psi | 87% | 2382 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 42,148 psi | 67% | 2244 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 98% | 55,201 psi | 87% | 2405 fps | 99.6% |
| Ramshot TAC | <<locked>> | 92% | 55,245 psi | 88% | 2339 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,172 psi | 86% | 2359 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 90% | 56,246 psi | 89% | 2333 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,766 psi | 55% | 1394 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 54,534 psi | 86% | 2316 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,476 psi | 86% | 2339 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 55,622 psi | 88% | 2451 fps | 99.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,953 psi | 82% | 2434 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 41,394 psi | 66% | 2257 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 92% | 55,158 psi | 87% | 2303 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,201 psi | 86% | 2313 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,242 psi | 81% | 2333 fps | 99.7% |
| Shooters World AR Plus | <<locked>> | 82% | 54,766 psi | 87% | 2313 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 47,529 psi | 75% | 2247 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,925 psi | 85% | 2346 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 54,882 psi | 87% | 2343 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 54,621 psi | 87% | 2290 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,476 psi | 86% | 1995 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,737 psi | 85% | 2313 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,200 psi | 84% | 2388 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,331 psi | 86% | 2270 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 56,724 psi | 90% | 2362 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 56,985 psi | 90% | 2382 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 56,449 psi | 89% | 2270 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 55,724 psi | 88% | 2267 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 56,028 psi | 89% | 2362 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 55,187 psi | 87% | 2270 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 56,188 psi | 89% | 2359 fps | 99.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,243 psi | 83% | 2336 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,579 psi | 60% | 2201 fps | 98.7% |
| Vihtavuori N120 | <<locked>> | 82% | 54,998 psi | 87% | 2172 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 56,507 psi | 90% | 2244 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 56,159 psi | 89% | 2257 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 56,521 psi | 90% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 54,737 psi | 87% | 2306 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,343 psi | 80% | 2280 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,411 psi | 70% | 2241 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 92% | 55,274 psi | 88% | 2326 fps | 100% |
| Vihtavuori N540 | <<locked>> | 98% | 56,202 psi | 89% | 2346 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,323 psi | 69% | 2251 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,759 psi | 73% | 2238 fps | 99% |
| Winchester 748 | <<locked>> | 92% | 53,998 psi | 86% | 2365 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 56,521 psi | 90% | 2392 fps | 99.9% |
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% | 39,030 psi | 62% | 2064 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,096 psi | 79% | 2280 fps | 98.7% |
| Accurate 2230 | <<locked>> | 80% | 50,444 psi | 80% | 2287 fps | 99% |
| Accurate 2460 | <<locked>> | 80% | 42,308 psi | 67% | 2146 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 31,560 psi | 50% | 1991 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 37,405 psi | 59% | 2106 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 29,892 psi | 47% | 1978 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 36,027 psi | 57% | 2152 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 47,645 psi | 76% | 2129 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,037 psi | 76% | 2146 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,781 psi | 57% | 2067 fps | 96.5% |
| ADI AR 2207 | <<locked>> | 80% | 51,938 psi | 82% | 2182 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 34,679 psi | 55% | 2031 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 46,949 psi | 74% | 2224 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,739 psi | 60% | 2080 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 36,230 psi | 57% | 2080 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,366 psi | 69% | 2234 fps | 98.9% |
| Alliant Power Pro 2000-MR | 43.4 gr | 84% | 36,666 psi | 58% | 2162 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 29,370 psi | 47% | 1962 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,353 psi | 70% | 2142 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 33,953 psi | 54% | 2051 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 96% | 37,855 psi | 60% | 2165 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,040 psi | 52% | 2100 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 52,576 psi | 83% | 2195 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,282 psi | 73% | 2133 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 36,912 psi | 59% | 2106 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 28,427 psi | 45% | 1955 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,900 psi | 63% | 2077 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,404 psi | 56% | 2090 fps | 98.3% |
| Hodgdon CFE223 | 42.3 gr | 80% | 39,015 psi | 62% | 2192 fps | 96.9% |
| Hodgdon H322 | <<locked>> | 80% | 43,062 psi | 68% | 2169 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,511 psi | 69% | 2188 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 38,566 psi | 61% | 2133 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 52,402 psi | 83% | 2201 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,969 psi | 57% | 2077 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 32,213 psi | 51% | 2034 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,010 psi | 51% | 2041 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,585 psi | 41% | 1214 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,795 psi | 55% | 2041 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 34,693 psi | 55% | 2083 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,040 psi | 54% | 2011 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,328 psi | 80% | 2244 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 45,295 psi | 72% | 2113 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 49,052 psi | 78% | 2257 fps | 95.2% |
| IMR 4831 | <<locked>> | 96% | 35,302 psi | 56% | 2116 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 32,474 psi | 51% | 2034 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 37,739 psi | 60% | 2080 fps | 98.2% |
| Lovex D073.4 | <<locked>> | 80% | 51,285 psi | 81% | 2274 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,771 psi | 66% | 2146 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 33,794 psi | 54% | 2051 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 36,941 psi | 59% | 2028 fps | 96.8% |
| Lovex S062 | <<locked>> | 80% | 31,720 psi | 50% | 1982 fps | 96.7% |
| Lovex S065 | <<locked>> | 96% | 42,119 psi | 67% | 2165 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 50,125 psi | 79% | 2195 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,244 psi | 56% | 2034 fps | 97.7% |
| Norma 202 | <<locked>> | 80% | 35,099 psi | 56% | 2047 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 31,241 psi | 50% | 2001 fps | 95% |
| Norma URP | <<locked>> | 96% | 37,304 psi | 59% | 2159 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 32,880 psi | 52% | 2051 fps | 95.1% |
| Ramshot TAC | <<locked>> | 84% | 42,670 psi | 68% | 2162 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,550 psi | 58% | 2093 fps | 96.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,872 psi | 65% | 2116 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,643 psi | 41% | 1240 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,453 psi | 67% | 2152 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 44,730 psi | 71% | 2205 fps | 95% |
| ReloadSwiss RS 52 | 41.1 gr | 82% | 34,896 psi | 55% | 2126 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,267 psi | 43% | 1965 fps | 95.6% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 38,856 psi | 62% | 2215 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 38,914 psi | 62% | 2080 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 33,417 psi | 53% | 1995 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 84% | 30,545 psi | 48% | 1995 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 51,285 psi | 81% | 2274 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 96% | 42,119 psi | 67% | 2165 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,794 psi | 54% | 2051 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 31,720 psi | 50% | 1982 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,628 psi | 71% | 2162 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,098 psi | 83% | 1969 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,369 psi | 75% | 2231 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,200 psi | 54% | 2083 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,078 psi | 71% | 2156 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 40,466 psi | 64% | 2136 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,389 psi | 55% | 2041 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,941 psi | 59% | 2008 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,124 psi | 48% | 1900 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 40,277 psi | 64% | 2146 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 36,434 psi | 58% | 2014 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 35,172 psi | 56% | 2051 fps | 96.2% |
| Somchem S355 | <<locked>> | 82% | 29,878 psi | 47% | 1962 fps | 95% |
| Somchem S365 | <<locked>> | 92% | 29,298 psi | 46% | 2024 fps | 95.9% |
| Vihtavuori N120 | <<locked>> | 80% | 51,837 psi | 82% | 2136 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,930 psi | 66% | 2070 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,941 psi | 59% | 2011 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,140 psi | 51% | 1991 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,141 psi | 53% | 1995 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 26,614 psi | 42% | 1877 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 94% | 36,840 psi | 58% | 2116 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 37,463 psi | 59% | 2073 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 80% | 31,850 psi | 50% | 1988 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 96% | 38,130 psi | 60% | 2162 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,257 psi | 53% | 2021 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 36,187 psi | 57% | 2106 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,315 psi | 53% | 2041 fps | 96.4% |
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 102 powders for .338-06 A-Square loaded with the .338 | 250gr | Rhino Penetrator. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,454 fps; across all powders the maximum-charge window runs from 1,358 fps to 2,454 fps. Accurate 4064 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, ADI AR 2208 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, ReloadSwiss RS 52 rank at the top here: for .338-06 A-Square with the .338 | 250gr | Rhino Penetrator 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.