Load Specifications
Bullet:.375 | 270gr | Barnes TSX FB
Bullet Manufacturer:Barnes
Bullet Weight:270 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Weath. Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:105 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:16.0
Load data in caliber .375 Weath. Mag. with .375 | 270gr | Barnes TSX FB 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, ReloadSwiss RS 52 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 54,853 psi | 86% | 2549 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,898 psi | 89% | 2621 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,651 psi | 87% | 2608 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,969 psi | 86% | 2631 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,724 psi | 89% | 2612 fps | 96.5% |
| Accurate 4064 | <<locked>> | 96% | 55,419 psi | 87% | 2648 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,834 psi | 75% | 2615 fps | 98.4% |
| Accurate LT-30 | <<locked>> | 82% | 54,592 psi | 86% | 2497 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,998 psi | 86% | 2523 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 57,464 psi | 90% | 2687 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 54,955 psi | 86% | 2635 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 55,419 psi | 87% | 2612 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,855 psi | 89% | 2644 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 56,884 psi | 89% | 2618 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 57,392 psi | 90% | 2802 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,346 psi | 85% | 2654 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,940 psi | 86% | 2556 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,274 psi | 87% | 2677 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,471 psi | 74% | 2625 fps | 98.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 2766 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,199 psi | 52% | 2362 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 57,305 psi | 90% | 2543 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 57,522 psi | 90% | 2707 fps | 99.6% |
| Bofors RP3 | <<locked>> | 96% | 54,679 psi | 86% | 2671 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,361 psi | 87% | 2635 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,390 psi | 87% | 2585 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,709 psi | 87% | 2674 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,056 psi | 85% | 2717 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 54,012 psi | 85% | 2595 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,071 psi | 86% | 2621 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,246 psi | 88% | 2680 fps | 99.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 2667 fps | 96.6% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 2687 fps | 96% |
| Hodgdon H4895 | <<locked>> | 90% | 54,549 psi | 85% | 2651 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,482 psi | 68% | 2513 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 57,116 psi | 90% | 2730 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 52,837 psi | 83% | 2700 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,679 psi | 54% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,086 psi | 88% | 2654 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 57,740 psi | 90% | 2680 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,636 psi | 86% | 2621 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,129 psi | 86% | 2602 fps | 97.1% |
| IMR 4198 | <<locked>> | 84% | 55,230 psi | 87% | 2516 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2667 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,672 psi | 72% | 2566 fps | 98.1% |
| IMR 4895 | <<locked>> | 94% | 56,681 psi | 89% | 2707 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 56,855 psi | 89% | 2644 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 56,855 psi | 89% | 2631 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 56,855 psi | 89% | 2664 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 57,580 psi | 90% | 2621 fps | 99.9% |
| Lovex S062 | <<locked>> | 96% | 57,319 psi | 90% | 2661 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2608 fps | 98% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 2589 fps | 96.4% |
| Norma 201 | <<locked>> | 92% | 56,014 psi | 88% | 2635 fps | 100% |
| Norma 202 | <<locked>> | 92% | 56,637 psi | 89% | 2641 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,346 psi | 85% | 2664 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 47,630 psi | 75% | 2608 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 94% | 54,940 psi | 86% | 2690 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,021 psi | 74% | 2602 fps | 96.4% |
| Ramshot TAC | <<locked>> | 90% | 57,464 psi | 90% | 2664 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 90% | 56,565 psi | 89% | 2680 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,563 psi | 86% | 2602 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,983 psi | 55% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 56,478 psi | 89% | 2628 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,985 psi | 89% | 2667 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,347 psi | 87% | 2740 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,897 psi | 86% | 2769 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,456 psi | 74% | 2635 fps | 98.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,602 psi | 76% | 2657 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 90% | 56,724 psi | 89% | 2615 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,434 psi | 88% | 2631 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,288 psi | 85% | 2657 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,361 psi | 87% | 2635 fps | 96.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2608 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 92% | 56,855 psi | 89% | 2664 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 57,319 psi | 90% | 2661 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 2589 fps | 96.4% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,449 psi | 88% | 2605 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,767 psi | 87% | 2625 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,565 psi | 89% | 2720 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,999 psi | 88% | 2575 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,361 psi | 87% | 2638 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,883 psi | 88% | 2661 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,766 psi | 86% | 2536 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,592 psi | 86% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 2566 fps | 96.7% |
| Somchem S321 | <<locked>> | 86% | 54,375 psi | 85% | 2631 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 57,203 psi | 90% | 2579 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,882 psi | 86% | 2635 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 54,940 psi | 86% | 2657 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,293 psi | 66% | 2559 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 86% | 54,621 psi | 86% | 2507 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,810 psi | 86% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,680 psi | 87% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 57,217 psi | 90% | 2618 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,652 psi | 89% | 2638 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2612 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 90% | 57,377 psi | 90% | 2644 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,172 psi | 86% | 2615 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,197 psi | 77% | 2615 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,259 psi | 55% | 2434 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,329 psi | 80% | 2602 fps | 99.8% |
| Winchester 748 | <<locked>> | 90% | 56,869 psi | 89% | 2690 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 2667 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,782 psi | 87% | 2674 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% | 42,801 psi | 67% | 2382 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,485 psi | 73% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,809 psi | 55% | 2297 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,742 psi | 65% | 2438 fps | 99.9% |
| Accurate 2700 | <<locked>> | 90% | 49,676 psi | 78% | 2507 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 32,938 psi | 52% | 2283 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 35,868 psi | 56% | 2402 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 51,503 psi | 81% | 2457 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,895 psi | 81% | 2480 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,247 psi | 62% | 2392 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 33,431 psi | 52% | 2254 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 51,735 psi | 81% | 2566 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,336 psi | 65% | 2408 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 40,669 psi | 64% | 2402 fps | 100% |
| Alliant Power Pro 2000-MR | 65.3 gr | 80% | 35,375 psi | 55% | 2398 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,489 psi | 51% | 2270 fps | 96.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,530 psi | 76% | 2470 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,070 psi | 55% | 2326 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 92% | 37,043 psi | 58% | 2418 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,981 psi | 50% | 2329 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,241 psi | 49% | 2313 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,372 psi | 79% | 2454 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,247 psi | 60% | 2392 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 31,705 psi | 50% | 2267 fps | 96.6% |
| Bofors RP7 | <<locked>> | 96% | 48,791 psi | 76% | 2536 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,439 psi | 68% | 2405 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,450 psi | 62% | 2421 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,656 psi | 68% | 2549 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 80% | 47,442 psi | 74% | 2503 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,008 psi | 75% | 2523 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,637 psi | 59% | 2375 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 96% | 45,005 psi | 71% | 2562 fps | 95% |
| Hodgdon H4350 | <<locked>> | 98% | 52,808 psi | 83% | 2635 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 39,523 psi | 62% | 2402 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,531 psi | 49% | 2267 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,549 psi | 56% | 2372 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 98% | 49,110 psi | 77% | 2641 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,802 psi | 40% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,145 psi | 60% | 2362 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 38,798 psi | 61% | 2408 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,041 psi | 55% | 2283 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,701 psi | 72% | 2454 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 49,211 psi | 77% | 2438 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 47,964 psi | 75% | 2523 fps | 95.5% |
| IMR 4831 | <<locked>> | 92% | 34,983 psi | 55% | 2362 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 35,882 psi | 56% | 2356 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 80% | 41,336 psi | 65% | 2408 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 46,253 psi | 72% | 2484 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 37,666 psi | 59% | 2375 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 40,030 psi | 63% | 2346 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 34,722 psi | 54% | 2290 fps | 97.8% |
| Lovex S065 | <<locked>> | 92% | 41,263 psi | 65% | 2418 fps | 95.4% |
| Lovex S070 | <<locked>> | 96% | 44,251 psi | 69% | 2490 fps | 95% |
| Norma 201 | <<locked>> | 80% | 38,363 psi | 60% | 2352 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 38,522 psi | 60% | 2365 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,447 psi | 54% | 2316 fps | 96.4% |
| Norma URP | <<locked>> | 92% | 36,796 psi | 58% | 2408 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 33,910 psi | 53% | 2323 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 98% | 44,005 psi | 69% | 2549 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 41,191 psi | 65% | 2405 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,379 psi | 63% | 2425 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,875 psi | 70% | 2454 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 41% | 1437 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,485 psi | 73% | 2487 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,830 psi | 69% | 2464 fps | 95.3% |
| ReloadSwiss RS 52 | 63.3 gr | 80% | 36,289 psi | 57% | 2415 fps | 96.3% |
| ReloadSwiss RS 60 | 64.3 gr | 80% | 29,863 psi | 47% | 2283 fps | 97.3% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 36,056 psi | 56% | 2421 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,610 psi | 62% | 2487 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 42,090 psi | 66% | 2398 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,419 psi | 57% | 2306 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 80% | 29,805 psi | 47% | 2215 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 96% | 48,791 psi | 76% | 2536 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,263 psi | 65% | 2418 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,666 psi | 59% | 2375 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 34,722 psi | 54% | 2290 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 96% | 44,251 psi | 69% | 2490 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,124 psi | 77% | 2503 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,011 psi | 82% | 2575 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,228 psi | 52% | 2313 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,385 psi | 77% | 2490 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,131 psi | 61% | 2375 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,797 psi | 59% | 2362 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,161 psi | 63% | 2320 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,011 psi | 52% | 2198 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 46,804 psi | 73% | 2470 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 44,411 psi | 70% | 2480 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 39,581 psi | 62% | 2323 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,972 psi | 61% | 2379 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 30,937 psi | 48% | 2224 fps | 95.6% |
| Somchem S365 | <<locked>> | 88% | 28,689 psi | 45% | 2254 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 45,600 psi | 71% | 2385 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,393 psi | 63% | 2320 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,607 psi | 56% | 2300 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,535 psi | 57% | 2310 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,385 psi | 46% | 2172 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 90% | 36,201 psi | 57% | 2362 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 41,321 psi | 65% | 2402 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 35,070 psi | 55% | 2293 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 37,826 psi | 59% | 2411 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 33,025 psi | 52% | 2382 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,053 psi | 50% | 2244 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 40,437 psi | 63% | 2441 fps | 99.5% |
| Winchester 760 | <<locked>> | 96% | 45,194 psi | 71% | 2566 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,086 psi | 58% | 2369 fps | 97.7% |
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 .375 Weath. Mag. loaded with the .375 | 270gr | Barnes TSX FB. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,802 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 (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:16.0 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, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for .375 Weath. Mag. with the .375 | 270gr | Barnes TSX FB 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.