Load Specifications
Load data in caliber .375 R Verney-Carron with .375 | 235gr | CutEdge ER Raptor bullet and 97 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, Hodgdon Superformance and Alliant Reloder-17.
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.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 52,968 psi | 89% | 2822 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 50,821 psi | 85% | 2838 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 51,358 psi | 86% | 2890 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 51,358 psi | 86% | 2890 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 52,098 psi | 88% | 2838 fps | 96.3% |
| Accurate 4064 | <<locked>> | 90% | 51,140 psi | 86% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 50,676 psi | 85% | 2959 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 52,286 psi | 88% | 2923 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 53,287 psi | 90% | 2920 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 51,329 psi | 86% | 2874 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 51,663 psi | 87% | 2848 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,764 psi | 87% | 3038 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 52,939 psi | 89% | 2933 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 52,939 psi | 89% | 2940 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,664 psi | 90% | 2966 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,707 psi | 89% | 3025 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,722 psi | 90% | 3064 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,246 psi | 63% | 2743 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,524 psi | 70% | 2900 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 51,866 psi | 87% | 2930 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 53,447 psi | 90% | 2956 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 50,560 psi | 85% | 2867 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,156 psi | 89% | 2858 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 50,314 psi | 85% | 2897 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 52,141 psi | 88% | 2995 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 51,271 psi | 86% | 2858 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 51,068 psi | 86% | 2910 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 94% | 51,996 psi | 87% | 2982 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 98% | 52,910 psi | 89% | 2946 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 52,765 psi | 89% | 2933 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,805 psi | 82% | 2897 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 51,996 psi | 87% | 2963 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 51,227 psi | 86% | 2992 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 59% | 1801 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 52,895 psi | 89% | 2917 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 51,039 psi | 86% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 51,996 psi | 87% | 2890 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 51,634 psi | 87% | 2858 fps | 97% |
| IMR 4350 | <<locked>> | 98% | 50,720 psi | 85% | 2890 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,663 psi | 89% | 2907 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,629 psi | 77% | 2854 fps | 98.5% |
| IMR 4895 | <<locked>> | 88% | 51,561 psi | 87% | 2940 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 51,329 psi | 86% | 2874 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 51,532 psi | 87% | 2894 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 52,098 psi | 88% | 2851 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 52,359 psi | 88% | 2900 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 51,561 psi | 87% | 2894 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 52,344 psi | 88% | 2927 fps | 97.5% |
| Norma 201 | <<locked>> | 86% | 50,821 psi | 85% | 2864 fps | 100% |
| Norma 202 | <<locked>> | 86% | 51,532 psi | 87% | 2871 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,852 psi | 89% | 2949 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 53,780 psi | 90% | 3009 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 53,316 psi | 90% | 2976 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,634 psi | 89% | 3002 fps | 98.2% |
| Ramshot TAC | <<locked>> | 84% | 51,517 psi | 87% | 2887 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 50,952 psi | 86% | 2904 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 52,185 psi | 88% | 2871 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,578 psi | 60% | 1844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,459 psi | 87% | 2894 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 50,430 psi | 85% | 2972 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,606 psi | 90% | 3068 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 50,575 psi | 85% | 2986 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 50,734 psi | 85% | 3012 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 51,764 psi | 87% | 2848 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 51,387 psi | 86% | 2864 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,316 psi | 90% | 2946 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 50,560 psi | 85% | 2867 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 51,561 psi | 87% | 2894 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 51,532 psi | 87% | 2894 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 52,359 psi | 88% | 2900 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 52,344 psi | 88% | 2927 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 51,663 psi | 87% | 2956 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,301 psi | 90% | 2917 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 50,749 psi | 85% | 2890 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,620 psi | 88% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,794 psi | 89% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,011 psi | 87% | 2844 fps | 97.1% |
| Somchem S321 | <<locked>> | 82% | 52,170 psi | 88% | 2900 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 51,851 psi | 87% | 2805 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,881 psi | 89% | 2907 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 53,679 psi | 90% | 2943 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,066 psi | 81% | 2953 fps | 100% |
| Unknown powder | <<locked>> | 96% | 51,503 psi | 87% | 2963 fps | 98.8% |
| Vihtavuori N130 | <<locked>> | 82% | 52,431 psi | 88% | 2772 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,895 psi | 89% | 2795 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 51,039 psi | 86% | 2831 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 51,938 psi | 87% | 2848 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 51,895 psi | 87% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,794 psi | 89% | 2949 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 51,605 psi | 87% | 2871 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,563 psi | 90% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 51,808 psi | 87% | 2953 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,437 psi | 68% | 2818 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,476 psi | 90% | 2933 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 51,880 psi | 87% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 51,996 psi | 87% | 2982 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,141 psi | 56% | 2723 fps | 97.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 46,586 psi | 78% | 2723 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,914 psi | 65% | 2638 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,643 psi | 75% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,643 psi | 75% | 2782 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 48,675 psi | 82% | 2782 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 36,854 psi | 62% | 2631 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,505 psi | 60% | 2661 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 43,076 psi | 72% | 2756 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,579 psi | 62% | 2598 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,179 psi | 76% | 2766 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 45,121 psi | 76% | 2753 fps | 100% |
| Alliant Power Pro 2000-MR | 79.3 gr | 80% | 39,015 psi | 66% | 2779 fps | 97.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,584 psi | 73% | 2769 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,013 psi | 61% | 2621 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,769 psi | 65% | 2684 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,866 psi | 57% | 2625 fps | 95.1% |
| Alliant Reloder-17 | 78.1 gr | 80% | 30,980 psi | 52% | 2575 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,777 psi | 52% | 2569 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,969 psi | 60% | 2762 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,235 psi | 71% | 2756 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 35,389 psi | 60% | 2618 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 47,500 psi | 80% | 2815 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,905 psi | 79% | 2756 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,743 psi | 74% | 2785 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,573 psi | 82% | 2933 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 48,022 psi | 81% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,390 psi | 61% | 2621 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 90% | 45,266 psi | 76% | 2861 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 96% | 49,705 psi | 84% | 2890 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,453 psi | 73% | 2766 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,777 psi | 52% | 2513 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,043 psi | 62% | 2684 fps | 98.5% |
| Hodgdon Superformance | 97 gr | 94% | 47,558 psi | 80% | 2923 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,092 psi | 44% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,551 psi | 65% | 2651 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 39,247 psi | 66% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,723 psi | 60% | 2572 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 43,105 psi | 72% | 2700 fps | 95% |
| IMR 4350 | <<locked>> | 96% | 47,674 psi | 80% | 2838 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,555 psi | 73% | 2740 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 32,996 psi | 55% | 2582 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,711 psi | 67% | 2717 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,179 psi | 76% | 2766 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 41,829 psi | 70% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,163 psi | 73% | 2690 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 38,043 psi | 64% | 2635 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 40,161 psi | 68% | 2680 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 43,250 psi | 73% | 2762 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 42,047 psi | 71% | 2707 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 42,453 psi | 71% | 2720 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,159 psi | 64% | 2674 fps | 97.9% |
| Norma URP | <<locked>> | 86% | 33,736 psi | 57% | 2612 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,623 psi | 63% | 2684 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 40,263 psi | 68% | 2766 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 45,078 psi | 76% | 2769 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,570 psi | 75% | 2792 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,820 psi | 82% | 2815 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 44% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,221 psi | 71% | 2723 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,654 psi | 68% | 2789 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,040 psi | 56% | 2648 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,418 psi | 60% | 2680 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,363 psi | 65% | 2753 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,672 psi | 77% | 2749 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,900 psi | 67% | 2654 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,257 psi | 56% | 2559 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 47,500 psi | 80% | 2815 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,161 psi | 68% | 2680 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,829 psi | 70% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,043 psi | 64% | 2635 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 43,250 psi | 73% | 2762 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,432 psi | 58% | 2615 fps | 96.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,192 psi | 73% | 2740 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,582 psi | 70% | 2723 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,497 psi | 73% | 2661 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,042 psi | 61% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,397 psi | 76% | 2733 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 48,762 psi | 82% | 2844 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,134 psi | 73% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,975 psi | 72% | 2740 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 34,258 psi | 58% | 2569 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 26,266 psi | 44% | 2438 fps | 95.2% |
| Unknown powder | <<locked>> | 86% | 36,912 psi | 62% | 2674 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,255 psi | 83% | 2726 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,859 psi | 74% | 2657 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,305 psi | 66% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,147 psi | 68% | 2651 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,576 psi | 55% | 2507 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 35,360 psi | 59% | 2615 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 45,208 psi | 76% | 2762 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,609 psi | 65% | 2638 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,679 psi | 58% | 2615 fps | 95% |
| Vihtavuori N555 | <<locked>> | 94% | 33,011 psi | 56% | 2648 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,906 psi | 49% | 2421 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 48,327 psi | 81% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 45,266 psi | 76% | 2861 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,009 psi | 52% | 2654 fps | 96.3% |
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 97 powders for .375 R Verney-Carron loaded with the .375 | 235gr | CutEdge ER Raptor. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,068 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (410 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 235.0 gr projectile in 0.375" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .375 R Verney-Carron with the .375 | 235gr | CutEdge ER Raptor 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.