Load Specifications
Load data in caliber .375 Raptor with .375 | 190gr | MAKER T-REX bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Shooters World Buffalo Rifle and Lovex D060.
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: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 96% | 49,980 psi | 86% | 2513 fps | 98% |
| Accurate 5744 | <<locked>> | 82% | 50,546 psi | 87% | 2543 fps | 98.9% |
| Accurate No. 11 FS | <<locked>> | 84% | 49,240 psi | 85% | 2493 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 50,778 psi | 88% | 2434 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 46,122 psi | 80% | 2556 fps | 99.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 37,826 psi | 65% | 2431 fps | 95.8% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 49,559 psi | 85% | 2559 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,240 psi | 50% | 1509 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 41,974 psi | 72% | 2441 fps | 97.6% |
| IMR 4227 | <<locked>> | 96% | 52,402 psi | 90% | 2546 fps | 99.8% |
| Lovex D060 | <<locked>> | 88% | 50,894 psi | 88% | 2549 fps | 99% |
| Lovex D063 | <<locked>> | 84% | 50,285 psi | 87% | 2523 fps | 98.9% |
| Lovex S053 | <<locked>> | 96% | 49,777 psi | 86% | 2507 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 42,888 psi | 74% | 2513 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,471 psi | 49% | 1542 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 50,995 psi | 88% | 2572 fps | 99.7% |
| Shooters World Blackout | <<locked>> | 84% | 50,285 psi | 87% | 2523 fps | 98.9% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 50,894 psi | 88% | 2549 fps | 99% |
| Shooters World SOCOM | <<locked>> | 88% | 51,300 psi | 88% | 2523 fps | 99.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 50,894 psi | 88% | 2385 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 49,850 psi | 86% | 2438 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 46,412 psi | 80% | 2520 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 88% | 38,261 psi | 66% | 2326 fps | 95.5% |
| Accurate 5744 | <<locked>> | 80% | 47,355 psi | 82% | 2493 fps | 98.5% |
| Accurate No. 11 FS | <<locked>> | 80% | 43,221 psi | 75% | 2402 fps | 99.7% |
| ADI AR 2205 | <<locked>> | 80% | 40,045 psi | 69% | 2274 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 25,222 psi | 43% | 2123 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 98% | 35,607 psi | 61% | 2388 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 88% | 34,287 psi | 59% | 2293 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,205 psi | 37% | 1345 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 33,721 psi | 58% | 2274 fps | 95.1% |
| IMR 4227 | <<locked>> | 80% | 32,460 psi | 56% | 2205 fps | 96.7% |
| Lovex D060 | 32.5 gr | 80% | 40,190 psi | 69% | 2365 fps | 97.1% |
| Lovex D063 | <<locked>> | 80% | 44,106 psi | 76% | 2428 fps | 98% |
| Lovex S053 | <<locked>> | 80% | 31,633 psi | 55% | 2195 fps | 99.2% |
| Norma 200 | <<locked>> | 92% | 33,460 psi | 58% | 2333 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,755 psi | 36% | 1375 fps | 100% |
| ReloadSwiss RS 36 | 33.8 gr | 80% | 31,111 psi | 54% | 2218 fps | 96% |
| Shooters World Blackout | <<locked>> | 80% | 44,106 psi | 76% | 2428 fps | 98% |
| Shooters World Buffalo Rifle | 32.5 gr | 80% | 40,190 psi | 69% | 2365 fps | 97.1% |
| Shooters World SOCOM | <<locked>> | 80% | 39,494 psi | 68% | 2336 fps | 97.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 29,936 psi | 52% | 2064 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 37,405 psi | 64% | 2257 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 25,570 psi | 44% | 2106 fps | 96.8% |
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 22 powders for .375 Raptor loaded with the .375 | 190gr | MAKER T-REX. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,572 fps; across all powders the maximum-charge window runs from 1,509 fps to 2,572 fps. ADI AR 2207 gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (400 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.375" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Alliant Reloder-10x, Alliant Reloder-7 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 36, Shooters World Buffalo Rifle, Lovex D060 rank at the top here: for .375 Raptor with the .375 | 190gr | MAKER T-REX 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.