Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:265 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.340 Weath. Mag. load data
Case Length (l3):2.825"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:100 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:10.5
Load data in caliber .340 Weath. Mag. with .338 | 265gr | Barnes TAC-TX BT bullet and 110 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 55,492 psi | 87% | 2444 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,638 psi | 90% | 2530 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,386 psi | 79% | 2520 fps | 99.9% |
| Accurate 4064 | <<locked>> | 86% | 55,854 psi | 88% | 2497 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,550 psi | 89% | 2608 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,288 psi | 87% | 2707 fps | 98.8% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 52,330 psi | 82% | 2654 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 82% | 55,521 psi | 87% | 2530 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,579 psi | 89% | 2536 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,186 psi | 85% | 2608 fps | 99.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,677 psi | 81% | 2602 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,028 psi | 88% | 2654 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,143 psi | 85% | 2605 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,143 psi | 85% | 2605 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,334 psi | 90% | 2556 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,682 psi | 90% | 2579 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,696 psi | 90% | 2657 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,172 psi | 86% | 2635 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 2648 fps | 99.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,212 psi | 79% | 2598 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,485 psi | 74% | 2536 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,394 psi | 65% | 2480 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2717 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,434 psi | 87% | 2552 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,180 psi | 72% | 2536 fps | 98% |
| Bofors RP3 | <<locked>> | 86% | 54,230 psi | 85% | 2526 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,212 psi | 79% | 2598 fps | 98.8% |
| Bofors RP7 | <<locked>> | 92% | 57,580 psi | 90% | 2566 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,551 psi | 90% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,853 psi | 86% | 2546 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,390 psi | 87% | 2615 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 55,651 psi | 87% | 2579 fps | 99.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,579 psi | 87% | 2605 fps | 97.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2585 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 56,188 psi | 88% | 2536 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,186 psi | 85% | 2539 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,246 psi | 88% | 2572 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 40,553 psi | 64% | 2507 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 92% | 55,579 psi | 87% | 2654 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 57% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,203 psi | 90% | 2536 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,898 psi | 89% | 2507 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,072 psi | 88% | 2520 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,390 psi | 87% | 2510 fps | 99.8% |
| IMR 4350 | <<locked>> | 94% | 54,926 psi | 86% | 2552 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,898 psi | 88% | 2546 fps | 99.8% |
| IMR 4831 | <<locked>> | 96% | 57,000 psi | 89% | 2598 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,419 psi | 87% | 2556 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,377 psi | 90% | 2592 fps | 98.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,284 psi | 77% | 2579 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 82% | 55,709 psi | 87% | 2503 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,592 psi | 86% | 2461 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,202 psi | 88% | 2510 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,434 psi | 87% | 2536 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 56,753 psi | 89% | 2579 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,611 psi | 65% | 2388 fps | 99.1% |
| Norma 201 | <<locked>> | 84% | 57,551 psi | 90% | 2516 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,824 psi | 86% | 2470 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,927 psi | 89% | 2566 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,390 psi | 87% | 2602 fps | 99.1% |
| Norma MRPᴾ | <<locked>> | 100% | 53,345 psi | 84% | 2677 fps | 99.8% |
| Norma URP | <<locked>> | 94% | 55,492 psi | 87% | 2595 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 57,740 psi | 90% | 2592 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,371 psi | 77% | 2592 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 94% | 54,085 psi | 85% | 2602 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,714 psi | 69% | 2480 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,854 psi | 58% | 1568 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,071 psi | 86% | 2536 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,998 psi | 86% | 2595 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,810 psi | 86% | 2625 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,594 psi | 89% | 2635 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,317 psi | 87% | 2664 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,118 psi | 63% | 2500 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 84% | 54,592 psi | 86% | 2474 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,346 psi | 85% | 2520 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,999 psi | 88% | 2579 fps | 98.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 2631 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 92% | 57,580 psi | 90% | 2566 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,434 psi | 87% | 2536 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,709 psi | 87% | 2503 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,202 psi | 88% | 2510 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,753 psi | 89% | 2579 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,217 psi | 88% | 2579 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,637 psi | 89% | 2539 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,508 psi | 90% | 2552 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,288 psi | 87% | 2411 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,086 psi | 88% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,274 psi | 87% | 2497 fps | 99.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,593 psi | 87% | 2628 fps | 99.3% |
| Somchem S335 | <<locked>> | 82% | 54,766 psi | 86% | 2408 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,391 psi | 88% | 2526 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,447 psi | 85% | 2516 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 57,725 psi | 90% | 2575 fps | 98% |
| Somchem S365 | <<locked>> | 96% | 54,447 psi | 85% | 2595 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 2605 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 82% | 55,840 psi | 88% | 2392 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,071 psi | 86% | 2434 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,550 psi | 87% | 2454 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,753 psi | 87% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,740 psi | 90% | 2585 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 2490 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 86% | 57,014 psi | 89% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,695 psi | 89% | 2595 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 2605 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 2671 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,551 psi | 90% | 2562 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,637 psi | 87% | 2615 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,540 psi | 67% | 2592 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,609 psi | 90% | 2559 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,229 psi | 83% | 2556 fps | 98.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,747 psi | 76% | 2362 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,137 psi | 74% | 2382 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 28,906 psi | 45% | 2129 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 46,224 psi | 72% | 2372 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,809 psi | 55% | 2267 fps | 98.9% |
| Accurate High Country | <<locked>> | 90% | 38,928 psi | 61% | 2438 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 96% | 45,339 psi | 71% | 2539 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 52,011 psi | 82% | 2484 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,193 psi | 69% | 2359 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 36,651 psi | 57% | 2306 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 94% | 42,453 psi | 67% | 2444 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,559 psi | 76% | 2552 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 36,767 psi | 58% | 2310 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 36,767 psi | 58% | 2310 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,498 psi | 70% | 2382 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,500 psi | 74% | 2441 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,476 psi | 54% | 2280 fps | 99.1% |
| Alliant Reloder-17 | 60.6 gr | 80% | 38,986 psi | 61% | 2392 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 36,390 psi | 57% | 2303 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 36,187 psi | 57% | 2346 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,947 psi | 39% | 2070 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 28,340 psi | 44% | 2175 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 26,353 psi | 41% | 2162 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,764 psi | 81% | 2507 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 35,694 psi | 56% | 2333 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 44,556 psi | 70% | 2392 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 36,187 psi | 57% | 2346 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 39,465 psi | 62% | 2283 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,896 psi | 84% | 2510 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,034 psi | 71% | 2402 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 37,014 psi | 58% | 2313 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 40,292 psi | 63% | 2333 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 94% | 45,382 psi | 71% | 2451 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 44,570 psi | 70% | 2438 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 52,562 psi | 82% | 2490 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,894 psi | 50% | 2185 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,197 psi | 77% | 2480 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 35,694 psi | 56% | 2395 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 35,969 psi | 56% | 2323 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 42% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,343 psi | 79% | 2448 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,301 psi | 84% | 2467 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,485 psi | 73% | 2385 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,863 psi | 77% | 2418 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 35,186 psi | 55% | 2221 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,857 psi | 64% | 2310 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 33,779 psi | 53% | 2231 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 48,718 psi | 76% | 2464 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 44,541 psi | 70% | 2398 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 43,134 psi | 68% | 2470 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 80% | 52,098 psi | 82% | 2457 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,387 psi | 81% | 2418 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,673 psi | 73% | 2385 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,319 psi | 60% | 2267 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 36,463 psi | 57% | 2251 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 28,224 psi | 44% | 2113 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 50,836 psi | 80% | 2434 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,532 psi | 81% | 2428 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,847 psi | 73% | 2428 fps | 100% |
| Norma 204 | <<locked>> | 82% | 36,883 psi | 58% | 2293 fps | 95.2% |
| Norma MRP | <<locked>> | 86% | 32,953 psi | 52% | 2303 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 35,012 psi | 55% | 2267 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 47,123 psi | 74% | 2451 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 39,827 psi | 62% | 2421 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 33,895 psi | 53% | 2257 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 94% | 35,157 psi | 55% | 2313 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,412 psi | 43% | 1398 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,252 psi | 71% | 2392 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,314 psi | 80% | 2543 fps | 100% |
| ReloadSwiss RS 60 | 60.6 gr | 80% | 41,495 psi | 65% | 2434 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,635 psi | 54% | 2287 fps | 98.7% |
| ReloadSwiss RS 70 | 61.5 gr | 80% | 33,953 psi | 53% | 2297 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 32,489 psi | 51% | 2316 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,457 psi | 76% | 2392 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,829 psi | 66% | 2343 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 40,654 psi | 64% | 2339 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 35,157 psi | 55% | 2283 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 39,465 psi | 62% | 2283 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,319 psi | 60% | 2267 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,098 psi | 82% | 2457 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,673 psi | 73% | 2385 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,463 psi | 57% | 2251 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,047 psi | 67% | 2395 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,736 psi | 83% | 2490 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,517 psi | 79% | 2461 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,909 psi | 81% | 2369 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,714 psi | 69% | 2257 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,492 psi | 59% | 2218 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 37,188 psi | 58% | 2329 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 51,517 psi | 81% | 2369 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,620 psi | 82% | 2477 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,409 psi | 66% | 2343 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 44,309 psi | 69% | 2379 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 31,415 psi | 49% | 2228 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 33,431 psi | 52% | 2221 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 52,489 psi | 82% | 2352 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,631 psi | 76% | 2356 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,863 psi | 77% | 2369 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,408 psi | 63% | 2280 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,376 psi | 57% | 2264 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 35,041 psi | 55% | 2251 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,079 psi | 74% | 2369 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,810 psi | 56% | 2267 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 27,151 psi | 43% | 2133 fps | 97.3% |
| Vihtavuori N560 | <<locked>> | 94% | 43,976 psi | 69% | 2507 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,563 psi | 56% | 2241 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 37,202 psi | 58% | 2316 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 21,799 psi | 34% | 2037 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,517 psi | 79% | 2470 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 37,521 psi | 59% | 2303 fps | 95.6% |
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 110 powders for .340 Weath. Mag. loaded with the .338 | 265gr | Barnes TAC-TX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,717 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,717 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 265.0 gr projectile in 0.338" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .340 Weath. Mag. with the .338 | 265gr | Barnes TAC-TX BT 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.