Load Specifications
Load data in caliber .375 Raptor with .375 | 200gr | MAKER TREX bullet and 26 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, IMR 4227 and Alliant Reloder-7.
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% | 52,170 psi | 90% | 2510 fps | 99% |
| Accurate 5744 | <<locked>> | 82% | 52,330 psi | 90% | 2533 fps | 99.6% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 49,124 psi | 85% | 2451 fps | 96.3% |
| Accurate No. 11 FS | <<locked>> | 84% | 51,474 psi | 89% | 2480 fps | 100% |
| ADI AR 2205 | <<locked>> | 86% | 49,603 psi | 86% | 2379 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 48,791 psi | 84% | 2549 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 39,885 psi | 69% | 2434 fps | 97.3% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 51,909 psi | 89% | 2552 fps | 99.4% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 46,470 psi | 80% | 2438 fps | 96% |
| Hodgdon H4198 | <<locked>> | 98% | 51,184 psi | 88% | 2493 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,312 psi | 51% | 1486 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 43,787 psi | 75% | 2441 fps | 98.7% |
| IMR 4227 | <<locked>> | 94% | 51,721 psi | 89% | 2497 fps | 100% |
| Lovex D060 | <<locked>> | 86% | 49,893 psi | 86% | 2497 fps | 99.4% |
| Lovex D063 | <<locked>> | 84% | 52,489 psi | 90% | 2516 fps | 99.6% |
| Lovex S053 | <<locked>> | 96% | 52,054 psi | 90% | 2490 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 45,382 psi | 78% | 2516 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,761 psi | 50% | 1522 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 50,256 psi | 87% | 2523 fps | 99.9% |
| Shooters World Blackout | <<locked>> | 84% | 52,489 psi | 90% | 2516 fps | 99.6% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 49,893 psi | 86% | 2497 fps | 99.4% |
| Shooters World SOCOM | <<locked>> | 86% | 50,473 psi | 87% | 2474 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 98% | 50,343 psi | 87% | 2333 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 51,996 psi | 90% | 2418 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 49,110 psi | 85% | 2510 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 39,088 psi | 67% | 2356 fps | 96.7% |
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>> | 84% | 34,940 psi | 60% | 2231 fps | 95.6% |
| Accurate 5744 | <<locked>> | 80% | 49,153 psi | 85% | 2484 fps | 99.3% |
| Accurate LT-30 | <<locked>> | 96% | 43,555 psi | 75% | 2365 fps | 95% |
| Accurate No. 11 FS | <<locked>> | 80% | 45,237 psi | 78% | 2395 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 41,191 psi | 71% | 2257 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 26,179 psi | 45% | 2123 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 94% | 33,112 psi | 57% | 2303 fps | 95.4% |
| Alliant Reloder-7 | 36.4 gr | 84% | 31,618 psi | 55% | 2205 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 43,685 psi | 75% | 2395 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 96% | 48,356 psi | 83% | 2454 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,350 psi | 37% | 1325 fps | 100% |
| IMR 4198 | <<locked>> | 88% | 31,154 psi | 54% | 2188 fps | 95.3% |
| IMR 4227 | 32.8 gr | 80% | 33,823 psi | 58% | 2201 fps | 97.9% |
| Lovex D060 | <<locked>> | 80% | 41,742 psi | 72% | 2362 fps | 98.2% |
| Lovex D063 | <<locked>> | 80% | 45,803 psi | 79% | 2421 fps | 99% |
| Lovex S053 | <<locked>> | 80% | 32,735 psi | 56% | 2182 fps | 99.7% |
| Norma 200 | <<locked>> | 88% | 30,748 psi | 53% | 2244 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,827 psi | 36% | 1355 fps | 100% |
| ReloadSwiss RS 36 | 34.8 gr | 80% | 32,401 psi | 56% | 2215 fps | 97.4% |
| Shooters World Blackout | <<locked>> | 80% | 45,803 psi | 79% | 2421 fps | 99% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 41,742 psi | 72% | 2362 fps | 98.2% |
| Shooters World SOCOM | <<locked>> | 80% | 40,988 psi | 71% | 2329 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 31,082 psi | 54% | 2047 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 38,870 psi | 67% | 2238 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 26,556 psi | 46% | 2103 fps | 98.1% |
| Vihtavuori N130 | <<locked>> | 96% | 34,563 psi | 60% | 2270 fps | 95.4% |
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 26 powders for .375 Raptor loaded with the .375 | 200gr | MAKER TREX. Alliant Reloder-7 delivers the highest muzzle velocity at 2,552 fps; across all powders the maximum-charge window runs from 1,486 fps to 2,552 fps. Accurate LT-30 gives the best case fill at 100 %, and 26 of the 26 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (400 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate LT-30, ADI AR 2207, Alliant Reloder-10x 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, IMR 4227, Alliant Reloder-7 rank at the top here: for .375 Raptor with the .375 | 200gr | MAKER TREX 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.