Load Specifications
Load data in caliber .375 Weath. Mag. with .375 | 220gr | Impala CFN bullet and 90 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% | 56,057 psi | 88% | 2848 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,853 psi | 86% | 2871 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,810 psi | 86% | 2874 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,985 psi | 88% | 2930 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 57,406 psi | 90% | 2956 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2890 fps | 96.9% |
| Accurate LT-30 | <<locked>> | 82% | 54,679 psi | 86% | 2782 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,085 psi | 86% | 2805 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,737 psi | 86% | 2927 fps | 99% |
| ADI AR 2208 | <<locked>> | 96% | 55,172 psi | 86% | 2913 fps | 98.5% |
| ADI AR 2219 | <<locked>> | 82% | 55,622 psi | 87% | 2907 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 57,145 psi | 90% | 2933 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 57,014 psi | 89% | 2920 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,274 psi | 87% | 2989 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 57,072 psi | 89% | 3081 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,882 psi | 86% | 2943 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,753 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,651 psi | 87% | 2963 fps | 98.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,834 psi | 75% | 2887 fps | 96.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,129 psi | 86% | 3048 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 57,348 psi | 90% | 2825 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 57,566 psi | 90% | 2986 fps | 98.5% |
| Bofors RP3 | <<locked>> | 96% | 55,753 psi | 87% | 2963 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,912 psi | 88% | 2871 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,318 psi | 88% | 2966 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 57,653 psi | 90% | 3054 fps | 99% |
| Hodgdon H322 | <<locked>> | 86% | 57,696 psi | 90% | 2936 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,593 psi | 87% | 2917 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,811 psi | 89% | 2966 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 90% | 55,172 psi | 86% | 2940 fps | 99.4% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,208 psi | 69% | 2776 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,971 psi | 89% | 3015 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,244 psi | 55% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,202 psi | 88% | 2936 fps | 99.4% |
| IMR 3031 | <<locked>> | 92% | 57,653 psi | 90% | 2979 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,853 psi | 86% | 2900 fps | 98.6% |
| IMR 4198 | <<locked>> | 84% | 55,361 psi | 87% | 2812 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,427 psi | 73% | 2831 fps | 96.5% |
| IMR 4895 | <<locked>> | 94% | 56,985 psi | 89% | 2995 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 90% | 57,145 psi | 90% | 2933 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 54,621 psi | 86% | 2877 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 92% | 57,682 psi | 90% | 2963 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 57,725 psi | 90% | 2900 fps | 99.3% |
| Lovex S062 | <<locked>> | 94% | 54,868 psi | 86% | 2907 fps | 99.7% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2884 fps | 96.4% |
| Norma 201 | <<locked>> | 92% | 57,246 psi | 90% | 2930 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 57,145 psi | 90% | 2933 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,839 psi | 86% | 2949 fps | 99% |
| Norma URPᴾ | <<locked>> | 100% | 48,254 psi | 76% | 2881 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 94% | 54,824 psi | 86% | 2969 fps | 98.9% |
| Ramshot TAC | <<locked>> | 88% | 54,375 psi | 85% | 2887 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 90% | 56,797 psi | 89% | 2966 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,114 psi | 86% | 2884 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,607 psi | 56% | 1818 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 56,840 psi | 89% | 2920 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 57,319 psi | 90% | 2940 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,187 psi | 86% | 3025 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,100 psi | 86% | 3061 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,167 psi | 75% | 2904 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 88% | 55,492 psi | 87% | 2877 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 57,551 psi | 90% | 2927 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 98% | 55,390 psi | 87% | 2949 fps | 99.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2884 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 92% | 57,682 psi | 90% | 2963 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,868 psi | 86% | 2907 fps | 99.7% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,753 psi | 89% | 2887 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,231 psi | 88% | 2920 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,449 psi | 88% | 3002 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,072 psi | 88% | 2871 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,101 psi | 88% | 2920 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,173 psi | 88% | 2943 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,579 psi | 87% | 2828 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,824 psi | 86% | 2818 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 55,187 psi | 86% | 2920 fps | 99.8% |
| Somchem S335 | <<locked>> | 90% | 54,737 psi | 86% | 2825 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,274 psi | 87% | 2913 fps | 98.9% |
| Somchem S355 | <<locked>> | 98% | 55,782 psi | 87% | 2946 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,453 psi | 68% | 2831 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 86% | 55,317 psi | 87% | 2799 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,303 psi | 87% | 2815 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,289 psi | 88% | 2897 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 57,580 psi | 90% | 2910 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 2923 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 2881 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 88% | 54,389 psi | 85% | 2884 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 94% | 55,753 psi | 87% | 2904 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,821 psi | 78% | 2884 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2867 fps | 99% |
| Winchester 748 | <<locked>> | 90% | 56,971 psi | 89% | 2982 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,883 psi | 88% | 2956 fps | 99.4% |
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% | 44,425 psi | 70% | 2667 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,138 psi | 75% | 2766 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 38,043 psi | 60% | 2592 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,192 psi | 68% | 2717 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 35,853 psi | 56% | 2572 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 42,859 psi | 67% | 2782 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 51,590 psi | 81% | 2736 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,938 psi | 81% | 2756 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,640 psi | 64% | 2661 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 41,321 psi | 65% | 2661 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 52,214 psi | 82% | 2858 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,424 psi | 66% | 2677 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 80% | 41,626 psi | 65% | 2687 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,878 psi | 77% | 2877 fps | 98.6% |
| Alliant Power Pro 2000-MR | 74.8 gr | 84% | 41,481 psi | 65% | 2776 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,069 psi | 53% | 2533 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,545 psi | 78% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,943 psi | 61% | 2644 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 42,743 psi | 67% | 2779 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 37,898 psi | 59% | 2700 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,821 psi | 80% | 2733 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 41,843 psi | 66% | 2707 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 33,765 psi | 53% | 2536 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,396 psi | 70% | 2674 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,944 psi | 64% | 2697 fps | 98.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,222 psi | 69% | 2818 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 80% | 47,892 psi | 75% | 2789 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,834 psi | 77% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 44,338 psi | 69% | 2746 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 40,930 psi | 64% | 2677 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 37,130 psi | 58% | 2621 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,724 psi | 58% | 2631 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,266 psi | 41% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,175 psi | 61% | 2625 fps | 96.4% |
| IMR 3031 | <<locked>> | 80% | 39,755 psi | 62% | 2684 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 38,624 psi | 61% | 2595 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 49,429 psi | 77% | 2723 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 41,162 psi | 65% | 2730 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 37,434 psi | 59% | 2625 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 42,424 psi | 66% | 2677 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 80% | 48,066 psi | 75% | 2772 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 39,421 psi | 62% | 2651 fps | 98.7% |
| Lovex S060 | <<locked>> | 80% | 41,075 psi | 64% | 2605 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 36,492 psi | 57% | 2559 fps | 96.5% |
| Lovex S065 | <<locked>> | 96% | 47,877 psi | 75% | 2782 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,234 psi | 63% | 2628 fps | 97.5% |
| Norma 202 | <<locked>> | 80% | 40,016 psi | 63% | 2641 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 38,348 psi | 60% | 2635 fps | 95.6% |
| Norma URP | <<locked>> | 96% | 42,786 psi | 67% | 2772 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 84% | 39,943 psi | 63% | 2694 fps | 95.7% |
| Ramshot TAC | <<locked>> | 84% | 47,863 psi | 75% | 2776 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,481 psi | 65% | 2690 fps | 96.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,774 psi | 72% | 2720 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,687 psi | 42% | 1627 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,340 psi | 74% | 2769 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,925 psi | 85% | 2887 fps | 95.6% |
| ReloadSwiss RS 52 | 70.8 gr | 82% | 39,987 psi | 63% | 2736 fps | 95.3% |
| ReloadSwiss RS 60 | 70.2 gr | 80% | 31,517 psi | 49% | 2536 fps | 95.4% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 45,310 psi | 71% | 2848 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 44,556 psi | 70% | 2690 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 38,479 psi | 60% | 2579 fps | 97% |
| Rottweil R 903 | <<locked>> | 84% | 36,114 psi | 57% | 2585 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 47,877 psi | 75% | 2782 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,421 psi | 62% | 2651 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 36,492 psi | 57% | 2559 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,966 psi | 78% | 2779 fps | 98.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,692 psi | 83% | 2864 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 39,117 psi | 61% | 2680 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,908 psi | 78% | 2779 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 46,354 psi | 73% | 2753 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,030 psi | 61% | 2625 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,495 psi | 65% | 2592 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,403 psi | 54% | 2454 fps | 99% |
| Somchem S321 | <<locked>> | 80% | 45,614 psi | 71% | 2756 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 41,089 psi | 64% | 2595 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 40,074 psi | 63% | 2638 fps | 95.9% |
| Somchem S355 | <<locked>> | 84% | 36,970 psi | 58% | 2592 fps | 95.7% |
| Somchem S365 | <<locked>> | 90% | 32,401 psi | 51% | 2562 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 46,688 psi | 73% | 2667 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,452 psi | 65% | 2592 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,217 psi | 58% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,811 psi | 59% | 2572 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 31,140 psi | 49% | 2428 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 96% | 44,875 psi | 70% | 2776 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 42,395 psi | 66% | 2671 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 36,593 psi | 57% | 2562 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 96% | 44,063 psi | 69% | 2779 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 37,913 psi | 59% | 2595 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 41,307 psi | 65% | 2710 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,189 psi | 60% | 2628 fps | 96.2% |
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 90 powders for .375 Weath. Mag. loaded with the .375 | 220gr | Impala CFN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,081 fps. Accurate 4350 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 220.0 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-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 | 220gr | Impala CFN 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.