Load Specifications
Load data in caliber .375 R Verney-Carron with .375 | 270gr | Lehigh Defense Controlled Fracturing bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 50,894 psi | 86% | 2644 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,359 psi | 90% | 2710 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,295 psi | 76% | 2677 fps | 98.4% |
| Accurate 4064 | <<locked>> | 86% | 51,169 psi | 86% | 2697 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 51,256 psi | 86% | 2789 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 49,734 psi | 84% | 2864 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 51,387 psi | 86% | 2726 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,736 psi | 89% | 2733 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,229 psi | 90% | 2831 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,664 psi | 90% | 2726 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 51,184 psi | 86% | 2844 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,968 psi | 89% | 2828 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,765 psi | 89% | 2753 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,214 psi | 89% | 2776 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,794 psi | 89% | 2851 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 50,169 psi | 84% | 2822 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,185 psi | 88% | 2818 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 45,629 psi | 77% | 2753 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,917 psi | 72% | 2703 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,695 psi | 63% | 2612 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,704 psi | 82% | 2881 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 51,155 psi | 86% | 2743 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 53,287 psi | 90% | 2769 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 45,629 psi | 77% | 2753 fps | 96.1% |
| Bofors RP7 | <<locked>> | 92% | 53,359 psi | 90% | 2749 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,243 psi | 90% | 2756 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 50,662 psi | 85% | 2733 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 50,662 psi | 85% | 2789 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 90% | 51,256 psi | 86% | 2753 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 51,938 psi | 87% | 2736 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,692 psi | 89% | 2776 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 51,605 psi | 87% | 2769 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 50,734 psi | 85% | 2822 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 60% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,272 psi | 90% | 2740 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 52,228 psi | 88% | 2713 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,069 psi | 88% | 2713 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 51,706 psi | 87% | 2697 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 50,662 psi | 85% | 2726 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 51,953 psi | 87% | 2726 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 52,011 psi | 87% | 2782 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 51,140 psi | 86% | 2749 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,664 psi | 90% | 2726 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 51,155 psi | 86% | 2700 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 50,879 psi | 86% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 51,982 psi | 87% | 2710 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 51,416 psi | 86% | 2723 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 52,344 psi | 88% | 2759 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,463 psi | 63% | 2530 fps | 96.5% |
| Norma 201 | <<locked>> | 84% | 53,432 psi | 90% | 2720 fps | 100% |
| Norma 202 | <<locked>> | 82% | 50,865 psi | 86% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 86% | 52,446 psi | 88% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 94% | 50,821 psi | 85% | 2769 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 48,283 psi | 81% | 2835 fps | 98.1% |
| Norma URP | <<locked>> | 94% | 50,734 psi | 85% | 2782 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 53,084 psi | 89% | 2785 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 52,939 psi | 89% | 2831 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,606 psi | 90% | 2766 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 61% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 50,923 psi | 86% | 2717 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 50,314 psi | 85% | 2785 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,490 psi | 90% | 2871 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 51,271 psi | 86% | 2815 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 50,386 psi | 85% | 2838 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 50,807 psi | 85% | 2674 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,316 psi | 90% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 51,590 psi | 87% | 2749 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,068 psi | 86% | 2799 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 53,359 psi | 90% | 2749 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 51,416 psi | 86% | 2723 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 51,155 psi | 86% | 2700 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 51,982 psi | 87% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 52,344 psi | 88% | 2759 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 51,619 psi | 87% | 2772 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,373 psi | 88% | 2730 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,301 psi | 90% | 2749 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 51,445 psi | 87% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 52,069 psi | 88% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 51,140 psi | 86% | 2674 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,589 psi | 85% | 2795 fps | 97.2% |
| Somchem S335 | <<locked>> | 82% | 51,068 psi | 86% | 2612 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,054 psi | 88% | 2717 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,461 psi | 90% | 2759 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,489 psi | 88% | 2831 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,648 psi | 87% | 2779 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 51,924 psi | 87% | 2595 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 50,792 psi | 85% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 51,459 psi | 87% | 2654 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 51,576 psi | 87% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,881 psi | 89% | 2776 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,498 psi | 75% | 2641 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 86% | 52,924 psi | 89% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 52,025 psi | 87% | 2782 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,863 psi | 80% | 2779 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,852 psi | 89% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 50,821 psi | 85% | 2792 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,464 psi | 65% | 2736 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,171 psi | 89% | 2759 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,414 psi | 81% | 2713 fps | 96.4% |
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 2495 | <<locked>> | 80% | 44,527 psi | 75% | 2552 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,685 psi | 73% | 2546 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 34,272 psi | 58% | 2457 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 42,163 psi | 71% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,343 psi | 53% | 2402 fps | 96.2% |
| Accurate High Country | <<locked>> | 98% | 46,296 psi | 78% | 2802 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 48,327 psi | 81% | 2677 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 40,959 psi | 69% | 2533 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 43,758 psi | 74% | 2661 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,502 psi | 85% | 2677 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,469 psi | 75% | 2730 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 43,482 psi | 73% | 2661 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,857 psi | 69% | 2556 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,918 psi | 74% | 2621 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,647 psi | 53% | 2418 fps | 96.4% |
| Alliant Reloder-17 | 79 gr | 80% | 35,375 psi | 59% | 2539 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 42,931 psi | 72% | 2651 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,685 psi | 72% | 2694 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,759 psi | 43% | 2277 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,156 psi | 56% | 2493 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,473 psi | 53% | 2500 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,805 psi | 80% | 2690 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 40,640 psi | 68% | 2559 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 42,685 psi | 72% | 2694 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 38,769 psi | 65% | 2484 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,719 psi | 84% | 2703 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,365 psi | 70% | 2569 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 38,696 psi | 65% | 2566 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 84% | 42,192 psi | 71% | 2589 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 48,849 psi | 82% | 2687 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,037 psi | 49% | 2320 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,049 psi | 76% | 2664 fps | 100% |
| Hodgdon Superformance | 89.8 gr | 86% | 40,741 psi | 69% | 2635 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 45% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,746 psi | 79% | 2638 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,921 psi | 82% | 2667 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,047 psi | 72% | 2566 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,527 psi | 77% | 2589 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 39,276 psi | 66% | 2520 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,014 psi | 64% | 2467 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 30,545 psi | 51% | 2365 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 45,034 psi | 76% | 2648 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 50,502 psi | 85% | 2677 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,703 psi | 80% | 2651 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,892 psi | 81% | 2608 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 42,989 psi | 72% | 2562 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,230 psi | 59% | 2415 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 38,116 psi | 64% | 2500 fps | 95.8% |
| Lovex S071 | <<locked>> | 98% | 35,027 psi | 59% | 2474 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 47,036 psi | 79% | 2621 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,630 psi | 80% | 2625 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,250 psi | 73% | 2608 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 44,309 psi | 75% | 2657 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 39,218 psi | 66% | 2654 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 31,705 psi | 53% | 2405 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 43,134 psi | 73% | 2628 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 35,360 psi | 59% | 2500 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,111 psi | 84% | 2710 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 45% | 1549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,727 psi | 70% | 2552 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,833 psi | 79% | 2730 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,681 psi | 63% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,198 psi | 52% | 2421 fps | 95.7% |
| ReloadSwiss RS 70 | 82.3 gr | 82% | 33,286 psi | 56% | 2480 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 44,875 psi | 75% | 2579 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,130 psi | 64% | 2503 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 48,254 psi | 81% | 2694 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 41,727 psi | 70% | 2635 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 38,769 psi | 65% | 2484 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,230 psi | 59% | 2415 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,703 psi | 80% | 2651 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,989 psi | 72% | 2562 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 38,116 psi | 64% | 2500 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,378 psi | 66% | 2559 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,704 psi | 82% | 2671 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,746 psi | 79% | 2648 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,443 psi | 81% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,524 psi | 68% | 2441 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,825 psi | 62% | 2411 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 44,077 psi | 74% | 2680 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 47,935 psi | 81% | 2566 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,646 psi | 82% | 2664 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,885 psi | 65% | 2510 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 28,311 psi | 48% | 2359 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 39,552 psi | 67% | 2562 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 48,950 psi | 82% | 2556 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,788 psi | 75% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,136 psi | 76% | 2562 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,028 psi | 62% | 2444 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,185 psi | 56% | 2411 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 41,611 psi | 70% | 2589 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 43,540 psi | 73% | 2556 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,605 psi | 55% | 2408 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 27,775 psi | 47% | 2349 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,721 psi | 55% | 2385 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 38,827 psi | 65% | 2569 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,759 psi | 43% | 2352 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,383 psi | 78% | 2651 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,179 psi | 76% | 2657 fps | 95.6% |
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 99 powders for .375 R Verney-Carron loaded with the .375 | 270gr | Lehigh Defense Controlled Fracturing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,881 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (410 MPa), the top charges use 60–90 %, 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 3100, Accurate High Country, 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 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .375 R Verney-Carron with the .375 | 270gr | Lehigh Defense Controlled Fracturing 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.