Load Specifications
Bullet:.375 | 270gr | Brenneke TOG
Bullet Manufacturer:Brenneke
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:1:6.0
Load data in caliber .375 Weath. Mag. with .375 | 270gr | Brenneke TOG bullet and 104 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, 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 56,463 psi | 88% | 2585 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,679 psi | 86% | 2612 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,636 psi | 86% | 2608 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,811 psi | 89% | 2674 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,157 psi | 85% | 2605 fps | 96.6% |
| Accurate 4064 | <<locked>> | 92% | 54,491 psi | 85% | 2651 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,838 psi | 84% | 2723 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 88% | 55,405 psi | 87% | 2684 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 56,188 psi | 88% | 2677 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,360 psi | 85% | 2635 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,998 psi | 86% | 2612 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,492 psi | 89% | 2736 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,940 psi | 86% | 2795 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,173 psi | 88% | 2703 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,130 psi | 88% | 2589 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,840 psi | 89% | 2723 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,112 psi | 82% | 2730 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,739 psi | 89% | 2818 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,173 psi | 58% | 2477 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,060 psi | 64% | 2618 fps | 96.9% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,143 psi | 86% | 2700 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 56,855 psi | 89% | 2720 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,927 psi | 89% | 2687 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,362 psi | 88% | 2621 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,290 psi | 90% | 2717 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,492 psi | 87% | 2756 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 55,143 psi | 86% | 2628 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,246 psi | 88% | 2657 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,215 psi | 85% | 2677 fps | 99.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 2776 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 96% | 54,404 psi | 85% | 2687 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 88% | 55,970 psi | 88% | 2694 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,327 psi | 76% | 2615 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,042 psi | 86% | 2723 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,418 psi | 85% | 2759 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 55% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,261 psi | 90% | 2694 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,883 psi | 88% | 2677 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,941 psi | 88% | 2667 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,173 psi | 88% | 2648 fps | 97.8% |
| IMR 4198 | <<locked>> | 82% | 56,014 psi | 88% | 2546 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 2657 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,434 psi | 87% | 2667 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,995 psi | 80% | 2667 fps | 99.2% |
| IMR 4895 | <<locked>> | 90% | 54,650 psi | 86% | 2700 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 54,360 psi | 85% | 2635 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,679 psi | 86% | 2625 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,984 psi | 86% | 2661 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,056 psi | 86% | 2615 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 55,521 psi | 87% | 2661 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,694 psi | 86% | 2661 fps | 98.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2694 fps | 97.9% |
| Norma 201 | <<locked>> | 90% | 57,537 psi | 90% | 2677 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,607 psi | 86% | 2631 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,999 psi | 88% | 2710 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 53,229 psi | 83% | 2717 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 92% | 56,579 psi | 89% | 2736 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,909 psi | 81% | 2707 fps | 98% |
| Ramshot TAC | <<locked>> | 86% | 54,795 psi | 86% | 2654 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,244 psi | 85% | 2671 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,550 psi | 87% | 2641 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 56% | 1644 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,653 psi | 90% | 2667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,665 psi | 86% | 2664 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,246 psi | 90% | 2785 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,637 psi | 89% | 2818 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 2746 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,650 psi | 84% | 2772 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 86% | 55,216 psi | 87% | 2612 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,636 psi | 86% | 2628 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,478 psi | 89% | 2707 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,927 psi | 89% | 2687 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,694 psi | 86% | 2661 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,984 psi | 86% | 2661 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,521 psi | 87% | 2661 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2694 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,305 psi | 90% | 2641 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,621 psi | 86% | 2717 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,971 psi | 89% | 2608 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,898 psi | 89% | 2687 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,174 psi | 90% | 2703 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,985 psi | 88% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,782 psi | 87% | 2572 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,230 psi | 87% | 2618 fps | 97.6% |
| Somchem S321 | <<locked>> | 84% | 55,796 psi | 87% | 2671 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,071 psi | 86% | 2572 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,304 psi | 88% | 2677 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 56,724 psi | 89% | 2703 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,500 psi | 74% | 2667 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,782 psi | 87% | 2539 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,115 psi | 88% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,667 psi | 90% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,056 psi | 86% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,824 psi | 86% | 2638 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 2710 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 86% | 54,969 psi | 86% | 2638 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,681 psi | 89% | 2654 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2717 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,103 psi | 63% | 2546 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2697 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,578 psi | 86% | 2680 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 2779 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,112 psi | 52% | 2461 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,043 psi | 89% | 2710 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% | 46,992 psi | 74% | 2461 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,256 psi | 80% | 2566 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,552 psi | 62% | 2388 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,354 psi | 73% | 2530 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,587 psi | 75% | 2503 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 37,391 psi | 59% | 2382 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,228 psi | 52% | 2356 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 43,120 psi | 68% | 2484 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,767 psi | 58% | 2346 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,165 psi | 71% | 2493 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 45,295 psi | 71% | 2484 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,765 psi | 83% | 2684 fps | 100% |
| Alliant Power Pro 2000-MR | 70 gr | 80% | 39,044 psi | 61% | 2507 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,143 psi | 57% | 2365 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,707 psi | 83% | 2546 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,885 psi | 61% | 2421 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,939 psi | 53% | 2369 fps | 95.1% |
| Alliant Reloder-17 | 68.9 gr | 80% | 31,169 psi | 49% | 2326 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,908 psi | 48% | 2323 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,290 psi | 60% | 2556 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,206 psi | 66% | 2487 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 35,694 psi | 56% | 2365 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 47,355 psi | 74% | 2536 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,978 psi | 74% | 2484 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,801 psi | 69% | 2513 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,182 psi | 76% | 2644 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 51,547 psi | 81% | 2582 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,518 psi | 82% | 2605 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,579 psi | 57% | 2369 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 92% | 43,758 psi | 69% | 2562 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 94% | 51,227 psi | 80% | 2638 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 43,468 psi | 68% | 2497 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,254 psi | 46% | 2224 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,320 psi | 62% | 2467 fps | 99% |
| Hodgdon Superformance | <<locked>> | 94% | 47,065 psi | 74% | 2638 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 41% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,756 psi | 65% | 2451 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 43,047 psi | 67% | 2493 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,537 psi | 60% | 2379 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,671 psi | 68% | 2444 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 52,823 psi | 83% | 2507 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,195 psi | 74% | 2559 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 46,180 psi | 72% | 2520 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 34,548 psi | 54% | 2369 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,798 psi | 62% | 2451 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,165 psi | 71% | 2493 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 51,068 psi | 80% | 2575 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,061 psi | 66% | 2467 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,294 psi | 68% | 2428 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 38,363 psi | 60% | 2382 fps | 99% |
| Lovex S065 | <<locked>> | 88% | 40,292 psi | 63% | 2421 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 43,352 psi | 68% | 2497 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 42,322 psi | 66% | 2444 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 42,453 psi | 67% | 2451 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,290 psi | 60% | 2411 fps | 97.9% |
| Norma URP | <<locked>> | 86% | 33,895 psi | 53% | 2359 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,681 psi | 59% | 2425 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 40,132 psi | 63% | 2497 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 45,107 psi | 71% | 2500 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,454 psi | 70% | 2516 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,689 psi | 76% | 2539 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,672 psi | 42% | 1470 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,618 psi | 79% | 2569 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,293 psi | 66% | 2457 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,669 psi | 64% | 2520 fps | 98% |
| ReloadSwiss RS 60 | 68.9 gr | 80% | 33,185 psi | 52% | 2392 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,404 psi | 55% | 2425 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,363 psi | 60% | 2487 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 46,195 psi | 72% | 2480 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,335 psi | 63% | 2398 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,634 psi | 53% | 2316 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 47,355 psi | 74% | 2536 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,292 psi | 63% | 2421 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,061 psi | 66% | 2467 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,363 psi | 60% | 2382 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 43,352 psi | 68% | 2497 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,476 psi | 84% | 2589 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,635 psi | 54% | 2362 fps | 96.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,476 psi | 84% | 2562 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,279 psi | 68% | 2474 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,684 psi | 65% | 2457 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,656 psi | 68% | 2398 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,216 psi | 57% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,237 psi | 71% | 2467 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 48,689 psi | 76% | 2569 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,323 psi | 68% | 2402 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,960 psi | 67% | 2470 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 34,577 psi | 54% | 2323 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 26,687 psi | 42% | 2208 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,313 psi | 77% | 2454 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,947 psi | 69% | 2395 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,566 psi | 62% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,234 psi | 63% | 2392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,793 psi | 51% | 2264 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 35,346 psi | 55% | 2362 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 45,165 psi | 71% | 2490 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,653 psi | 61% | 2379 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,809 psi | 55% | 2365 fps | 95% |
| Vihtavuori N555 | <<locked>> | 94% | 33,054 psi | 52% | 2395 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,153 psi | 46% | 2188 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 44,744 psi | 70% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 43,961 psi | 69% | 2566 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,053 psi | 49% | 2398 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,017 psi | 64% | 2461 fps | 98.9% |
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 104 powders for .375 Weath. Mag. loaded with the .375 | 270gr | Brenneke TOG. Alliant Reloder-17 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,818 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .375 Weath. Mag. with the .375 | 270gr | Brenneke TOG 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.