Load Specifications
Load data in caliber .375 R Verney-Carron with .375 | 275gr | SUS-TAC HP bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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.
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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 2495 | <<locked>> | 84% | 53,142 psi | 89% | 2641 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,489 psi | 88% | 2657 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,340 psi | 80% | 2677 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 53,287 psi | 90% | 2690 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,403 psi | 90% | 2789 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 52,823 psi | 89% | 2717 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 50,807 psi | 85% | 2674 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 51,271 psi | 86% | 2769 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 52,576 psi | 88% | 2835 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 53,577 psi | 90% | 2726 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 51,184 psi | 86% | 2697 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 51,430 psi | 86% | 2717 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 51,010 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 51,706 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,722 psi | 90% | 2812 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,282 psi | 80% | 2753 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,483 psi | 75% | 2700 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,189 psi | 66% | 2615 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,502 psi | 85% | 2881 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 52,649 psi | 89% | 2733 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 51,677 psi | 87% | 2710 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,282 psi | 80% | 2753 fps | 96.7% |
| Bofors RP7 | <<locked>> | 90% | 51,547 psi | 87% | 2690 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 52,170 psi | 88% | 2723 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 53,650 psi | 90% | 2805 fps | 99% |
| Hodgdon H4350 | <<locked>> | 92% | 51,024 psi | 86% | 2720 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 53,432 psi | 90% | 2726 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 50,937 psi | 86% | 2717 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,388 psi | 90% | 2762 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,170 psi | 88% | 2815 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 61% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,693 psi | 90% | 2717 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 52,634 psi | 89% | 2687 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 52,953 psi | 89% | 2697 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,170 psi | 88% | 2674 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 52,040 psi | 88% | 2720 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,185 psi | 89% | 2717 fps | 98.8% |
| IMR 4831 | <<locked>> | 98% | 51,213 psi | 86% | 2740 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 52,736 psi | 89% | 2743 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 52,953 psi | 89% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,257 psi | 88% | 2644 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,592 psi | 90% | 2700 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 52,924 psi | 89% | 2713 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 50,821 psi | 85% | 2703 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,291 psi | 66% | 2536 fps | 97.2% |
| Norma 201 | <<locked>> | 82% | 51,851 psi | 87% | 2664 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,359 psi | 88% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 84% | 50,691 psi | 85% | 2700 fps | 100% |
| Norma 204 | <<locked>> | 94% | 52,301 psi | 88% | 2766 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 49,893 psi | 84% | 2831 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 52,301 psi | 88% | 2772 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 50,952 psi | 86% | 2726 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,417 psi | 90% | 2851 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 51,010 psi | 86% | 2772 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,108 psi | 78% | 2707 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 62% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 52,315 psi | 88% | 2707 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 51,822 psi | 87% | 2776 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 51,517 psi | 87% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,084 psi | 89% | 2808 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 51,953 psi | 87% | 2835 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 52,417 psi | 88% | 2664 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 51,735 psi | 87% | 2707 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,011 psi | 89% | 2740 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,779 psi | 89% | 2799 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 51,547 psi | 87% | 2690 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 52,924 psi | 89% | 2713 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 52,953 psi | 89% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,592 psi | 90% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 50,821 psi | 85% | 2703 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,098 psi | 89% | 2762 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 51,271 psi | 86% | 2690 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 52,939 psi | 89% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,447 psi | 90% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 52,808 psi | 89% | 2667 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,286 psi | 88% | 2792 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 52,533 psi | 88% | 2598 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,592 psi | 90% | 2707 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 51,938 psi | 87% | 2703 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 50,705 psi | 85% | 2772 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,432 psi | 90% | 2776 fps | 98.5% |
| Unknown powder | <<locked>> | 92% | 53,156 psi | 89% | 2779 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 82% | 53,359 psi | 90% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 52,344 psi | 88% | 2625 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 52,924 psi | 89% | 2644 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,055 psi | 89% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 51,140 psi | 86% | 2717 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,050 psi | 77% | 2641 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 84% | 51,010 psi | 86% | 2641 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,679 psi | 90% | 2776 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,647 psi | 83% | 2772 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 50,691 psi | 85% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,650 psi | 90% | 2805 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,030 psi | 67% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,909 psi | 87% | 2740 fps | 97.3% |
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% | 46,775 psi | 79% | 2552 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 40,495 psi | 68% | 2448 fps | 95.4% |
| Accurate 3100 | <<locked>> | 90% | 33,649 psi | 57% | 2415 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 44,280 psi | 74% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,025 psi | 56% | 2411 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 49,763 psi | 84% | 2667 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,293 psi | 71% | 2526 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 45,107 psi | 76% | 2661 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,890 psi | 77% | 2723 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,415 psi | 85% | 2677 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,409 psi | 71% | 2552 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,382 psi | 76% | 2615 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,851 psi | 55% | 2421 fps | 97.1% |
| Alliant Reloder-17 | 78.4 gr | 80% | 36,767 psi | 62% | 2543 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,440 psi | 75% | 2651 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 41,466 psi | 70% | 2641 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,483 psi | 43% | 2241 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,532 psi | 55% | 2451 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,806 psi | 52% | 2454 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,269 psi | 83% | 2680 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 42,351 psi | 71% | 2559 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 41,466 psi | 70% | 2641 fps | 95% |
| Bofors RP7 | <<locked>> | 82% | 40,147 psi | 68% | 2484 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 42,917 psi | 72% | 2566 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 80% | 38,130 psi | 64% | 2523 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 86% | 42,366 psi | 71% | 2562 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 50,299 psi | 85% | 2677 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,313 psi | 51% | 2323 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,874 psi | 74% | 2612 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 39,262 psi | 66% | 2575 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 45% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,541 psi | 75% | 2569 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 46,427 psi | 78% | 2595 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,481 psi | 70% | 2503 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,017 psi | 69% | 2474 fps | 96.5% |
| IMR 4350 | <<locked>> | 84% | 38,087 psi | 64% | 2464 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,204 psi | 66% | 2464 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 29,066 psi | 49% | 2297 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 46,514 psi | 78% | 2641 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,617 psi | 83% | 2644 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,066 psi | 83% | 2595 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,483 psi | 75% | 2556 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,738 psi | 62% | 2418 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 37,130 psi | 62% | 2444 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 34,621 psi | 58% | 2438 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 48,776 psi | 82% | 2615 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,240 psi | 83% | 2618 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,730 psi | 75% | 2602 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 42,743 psi | 72% | 2595 fps | 95% |
| Norma MRP | <<locked>> | 92% | 38,072 psi | 64% | 2598 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 33,199 psi | 56% | 2411 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 44,657 psi | 75% | 2621 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 49,647 psi | 83% | 2789 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 82% | 34,360 psi | 58% | 2448 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 42,859 psi | 72% | 2644 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 46% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,134 psi | 73% | 2549 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,428 psi | 81% | 2723 fps | 99.9% |
| ReloadSwiss RS 60 | 78.4 gr | 80% | 39,117 psi | 66% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,721 psi | 55% | 2428 fps | 96.5% |
| ReloadSwiss RS 70 | 79.7 gr | 80% | 32,372 psi | 54% | 2428 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 46,383 psi | 78% | 2572 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,914 psi | 67% | 2507 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 49,835 psi | 84% | 2690 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 94% | 43,207 psi | 73% | 2631 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 40,147 psi | 68% | 2484 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,738 psi | 62% | 2418 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,617 psi | 83% | 2644 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,483 psi | 75% | 2556 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,130 psi | 62% | 2444 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,785 psi | 69% | 2556 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,153 psi | 81% | 2641 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,705 psi | 84% | 2552 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,771 psi | 70% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,247 psi | 64% | 2411 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,786 psi | 72% | 2628 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 49,501 psi | 83% | 2556 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,140 psi | 84% | 2657 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,509 psi | 68% | 2510 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 29,834 psi | 50% | 2369 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 38,537 psi | 65% | 2510 fps | 95.1% |
| Unknown powder | <<locked>> | 80% | 35,911 psi | 60% | 2464 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 80% | 50,154 psi | 84% | 2539 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,267 psi | 78% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,673 psi | 78% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,580 psi | 65% | 2444 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,548 psi | 58% | 2411 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 40,364 psi | 68% | 2536 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 44,947 psi | 76% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,026 psi | 57% | 2411 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 27,427 psi | 46% | 2310 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,011 psi | 57% | 2385 fps | 99% |
| Winchester 760 | <<locked>> | 80% | 38,130 psi | 64% | 2523 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,469 psi | 43% | 2313 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,933 psi | 76% | 2625 fps | 95.7% |
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 95 powders for .375 R Verney-Carron loaded with the .375 | 275gr | SUS-TAC HP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,881 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (410 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.375" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, Alliant Reloder-22 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .375 R Verney-Carron with the .375 | 275gr | SUS-TAC HP 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.