Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:250 gr
Bullet Diameter:0.374"
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 .374 | 250gr | Rhino Solid Shank bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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>> | 86% | 54,665 psi | 86% | 2677 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,797 psi | 89% | 2753 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,362 psi | 88% | 2743 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,969 psi | 86% | 2762 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,318 psi | 88% | 2740 fps | 96.3% |
| Accurate 4064 | <<locked>> | 94% | 55,970 psi | 88% | 2785 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,721 psi | 81% | 2802 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 56,927 psi | 89% | 2664 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,348 psi | 90% | 2690 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 57,232 psi | 90% | 2822 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,621 psi | 86% | 2766 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,362 psi | 88% | 2776 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 56,898 psi | 89% | 2753 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,534 psi | 85% | 2825 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,927 psi | 89% | 2936 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 57,696 psi | 90% | 2835 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,462 psi | 85% | 2684 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,143 psi | 86% | 2808 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,343 psi | 79% | 2808 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,882 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,810 psi | 56% | 2536 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,347 psi | 88% | 2664 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 57,087 psi | 89% | 2835 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 54,781 psi | 86% | 2802 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,216 psi | 87% | 2766 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,897 psi | 86% | 2713 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,405 psi | 87% | 2802 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 57,624 psi | 90% | 2900 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 57,000 psi | 89% | 2769 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,607 psi | 86% | 2749 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,130 psi | 88% | 2815 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 2854 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 98% | 56,289 psi | 88% | 2822 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 54,288 psi | 85% | 2782 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,601 psi | 73% | 2690 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,797 psi | 89% | 2861 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 56,347 psi | 88% | 2890 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,099 psi | 55% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,477 psi | 87% | 2782 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 57,421 psi | 90% | 2815 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,566 psi | 90% | 2799 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,476 psi | 85% | 2726 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 54,505 psi | 85% | 2641 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 57,363 psi | 90% | 2799 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,168 psi | 77% | 2746 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 56,521 psi | 89% | 2841 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 56,362 psi | 88% | 2776 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,666 psi | 89% | 2762 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,782 psi | 89% | 2799 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,956 psi | 89% | 2749 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 57,203 psi | 90% | 2795 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,275 psi | 88% | 2792 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 2769 fps | 97% |
| Norma 201 | <<locked>> | 90% | 55,840 psi | 88% | 2766 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,304 psi | 88% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,302 psi | 85% | 2799 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 51,140 psi | 80% | 2792 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 54,752 psi | 86% | 2822 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,212 psi | 79% | 2785 fps | 97% |
| Ramshot TAC | <<locked>> | 88% | 56,753 psi | 89% | 2792 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,173 psi | 88% | 2812 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 57,493 psi | 90% | 2776 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 56% | 1719 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,927 psi | 88% | 2759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,652 psi | 89% | 2795 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,390 psi | 87% | 2874 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,665 psi | 86% | 2907 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 2825 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2848 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 88% | 56,971 psi | 89% | 2753 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,333 psi | 88% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,636 psi | 86% | 2792 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 55,216 psi | 87% | 2766 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,275 psi | 88% | 2792 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,782 psi | 89% | 2799 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 57,203 psi | 90% | 2795 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 2769 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,550 psi | 87% | 2730 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 56,405 psi | 88% | 2854 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,288 psi | 87% | 2703 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,984 psi | 86% | 2766 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,651 psi | 87% | 2792 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 57,682 psi | 90% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 57,508 psi | 90% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 2746 fps | 97.2% |
| Somchem S321 | <<locked>> | 86% | 57,696 psi | 90% | 2808 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,855 psi | 89% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,607 psi | 86% | 2762 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 55,056 psi | 86% | 2789 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,745 psi | 72% | 2743 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 57,421 psi | 90% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,740 psi | 90% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,666 psi | 87% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,826 psi | 89% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,724 psi | 89% | 2772 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 2792 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 56,927 psi | 89% | 2776 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,085 psi | 86% | 2746 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,881 psi | 83% | 2799 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,493 psi | 60% | 2615 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,708 psi | 86% | 2779 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 56,594 psi | 89% | 2822 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 2854 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,317 psi | 87% | 2799 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% | 45,527 psi | 71% | 2546 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,661 psi | 78% | 2651 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,000 psi | 60% | 2464 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,744 psi | 70% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,663 psi | 83% | 2684 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,926 psi | 56% | 2451 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 36,680 psi | 57% | 2526 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 53,650 psi | 84% | 2621 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 54,027 psi | 85% | 2644 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,800 psi | 66% | 2562 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 35,549 psi | 56% | 2415 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,830 psi | 69% | 2575 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 43,627 psi | 68% | 2569 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,053 psi | 80% | 2772 fps | 99.7% |
| Alliant Power Pro 2000-MR | 72.1 gr | 80% | 37,739 psi | 59% | 2572 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,983 psi | 55% | 2434 fps | 97.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,242 psi | 80% | 2638 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,594 psi | 59% | 2493 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,144 psi | 58% | 2539 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 32,198 psi | 50% | 2444 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 33,794 psi | 53% | 2487 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,953 psi | 83% | 2618 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,872 psi | 64% | 2562 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 34,490 psi | 54% | 2434 fps | 97.2% |
| Bofors RP7 | <<locked>> | 96% | 52,054 psi | 82% | 2717 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,759 psi | 72% | 2569 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,322 psi | 66% | 2592 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,528 psi | 73% | 2726 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 49,995 psi | 78% | 2671 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,082 psi | 80% | 2697 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,797 psi | 59% | 2490 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 48,283 psi | 76% | 2743 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 52,692 psi | 83% | 2766 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,119 psi | 66% | 2572 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,995 psi | 50% | 2385 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,985 psi | 60% | 2539 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 96% | 48,921 psi | 77% | 2766 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 41% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,509 psi | 63% | 2526 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 41,437 psi | 65% | 2572 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,304 psi | 58% | 2448 fps | 96.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,167 psi | 75% | 2625 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,445 psi | 81% | 2598 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,645 psi | 75% | 2644 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 35,505 psi | 56% | 2484 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 38,464 psi | 60% | 2526 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 80% | 43,830 psi | 69% | 2575 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 49,545 psi | 78% | 2661 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,625 psi | 64% | 2546 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 42,206 psi | 66% | 2507 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 37,202 psi | 58% | 2454 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 41,466 psi | 65% | 2539 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 47,413 psi | 74% | 2671 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 40,930 psi | 64% | 2520 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 41,162 psi | 65% | 2530 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 37,014 psi | 58% | 2484 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 37,144 psi | 58% | 2530 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 36,347 psi | 57% | 2490 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 44,135 psi | 69% | 2674 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 43,714 psi | 69% | 2572 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,120 psi | 68% | 2595 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,413 psi | 74% | 2621 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 42% | 1535 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,110 psi | 77% | 2654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,642 psi | 68% | 2582 fps | 95% |
| ReloadSwiss RS 52 | 69.9 gr | 80% | 39,044 psi | 61% | 2589 fps | 96.9% |
| ReloadSwiss RS 60 | 71 gr | 80% | 32,097 psi | 50% | 2454 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 39,030 psi | 61% | 2598 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,395 psi | 66% | 2667 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 44,846 psi | 70% | 2566 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,059 psi | 61% | 2474 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 32,401 psi | 51% | 2382 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 96% | 52,054 psi | 82% | 2717 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,466 psi | 65% | 2539 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,625 psi | 64% | 2546 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 37,202 psi | 58% | 2454 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 47,413 psi | 74% | 2671 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,895 psi | 81% | 2674 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,344 psi | 52% | 2425 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,938 psi | 81% | 2657 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,989 psi | 66% | 2546 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,292 psi | 63% | 2530 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,424 psi | 66% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,114 psi | 55% | 2349 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 46,702 psi | 73% | 2589 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 47,326 psi | 74% | 2654 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 41,989 psi | 66% | 2484 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,655 psi | 65% | 2546 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 33,315 psi | 52% | 2388 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 29,138 psi | 46% | 2369 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 47,979 psi | 75% | 2546 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,670 psi | 67% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,159 psi | 60% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,986 psi | 61% | 2470 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,691 psi | 50% | 2333 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 88% | 36,477 psi | 57% | 2480 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 43,932 psi | 69% | 2572 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 37,521 psi | 59% | 2457 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 38,087 psi | 60% | 2533 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 33,881 psi | 53% | 2510 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,198 psi | 50% | 2352 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 43,236 psi | 68% | 2612 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 48,457 psi | 76% | 2746 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,624 psi | 62% | 2533 fps | 98.1% |
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 116 powders for .375 Weath. Mag. loaded with the .374 | 250gr | Rhino Solid Shank. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,936 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,936 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.374" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .375 Weath. Mag. with the .374 | 250gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.