Load Specifications
Load data in caliber .375 Hoelderlin with .375 | 285gr | Speer Grand Slam bullet and 87 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, ReloadSwiss RS 60 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% | 46,992 psi | 85% | 2343 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 48,051 psi | 87% | 2402 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 46,920 psi | 85% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 47,456 psi | 86% | 2441 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 47,456 psi | 86% | 2441 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 47,007 psi | 85% | 2434 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,150 psi | 82% | 2480 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 88% | 48,849 psi | 89% | 2461 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 94% | 49,719 psi | 90% | 2457 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 48,240 psi | 88% | 2421 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 47,616 psi | 86% | 2408 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 47,747 psi | 87% | 2549 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,936 psi | 89% | 2477 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 92% | 49,574 psi | 90% | 2493 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,353 psi | 82% | 2487 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 48,892 psi | 89% | 2572 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,124 psi | 87% | 2470 fps | 98.6% |
| Bofors RP3 | <<locked>> | 94% | 48,776 psi | 89% | 2487 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,543 psi | 86% | 2369 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 49,719 psi | 90% | 2493 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 47,834 psi | 87% | 2520 fps | 99% |
| Hodgdon H322 | <<locked>> | 84% | 48,138 psi | 87% | 2411 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 47,152 psi | 86% | 2448 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 88% | 49,226 psi | 89% | 2470 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,568 psi | 75% | 2382 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 47,471 psi | 86% | 2493 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,766 psi | 63% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 49,472 psi | 90% | 2457 fps | 99.7% |
| IMR 3031 | <<locked>> | 92% | 49,835 psi | 90% | 2480 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 48,341 psi | 88% | 2428 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 94% | 48,733 psi | 88% | 2402 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,095 psi | 89% | 2438 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 38,566 psi | 70% | 2346 fps | 96.6% |
| IMR 4895 | <<locked>> | 90% | 47,834 psi | 87% | 2477 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 48,240 psi | 88% | 2421 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 47,863 psi | 87% | 2408 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 47,456 psi | 86% | 2441 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 49,443 psi | 90% | 2402 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 48,660 psi | 88% | 2441 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 47,819 psi | 87% | 2431 fps | 97.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,950 psi | 87% | 2454 fps | 96% |
| Norma 201 | <<locked>> | 88% | 47,819 psi | 87% | 2415 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 47,964 psi | 87% | 2421 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,747 psi | 88% | 2484 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 45,252 psi | 82% | 2474 fps | 98% |
| Ramshot Big Game | <<locked>> | 92% | 48,704 psi | 88% | 2503 fps | 99.3% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,730 psi | 81% | 2464 fps | 95.9% |
| Ramshot TAC | <<locked>> | 86% | 48,385 psi | 88% | 2428 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 47,587 psi | 86% | 2451 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,168 psi | 89% | 2421 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,983 psi | 63% | 1522 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 47,877 psi | 87% | 2408 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,008 psi | 87% | 2434 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,095 psi | 89% | 2546 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 48,950 psi | 89% | 2582 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,063 psi | 82% | 2500 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,195 psi | 84% | 2513 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 86% | 49,095 psi | 89% | 2405 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 48,254 psi | 88% | 2415 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 96% | 48,660 psi | 88% | 2477 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,819 psi | 87% | 2431 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 47,456 psi | 86% | 2441 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,660 psi | 88% | 2441 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,950 psi | 87% | 2454 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 47,195 psi | 86% | 2487 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,676 psi | 90% | 2454 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 47,297 psi | 86% | 2438 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,806 psi | 90% | 2369 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,269 psi | 89% | 2365 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 48,849 psi | 89% | 2451 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 49,023 psi | 89% | 2372 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 49,168 psi | 89% | 2451 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 49,342 psi | 90% | 2477 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,364 psi | 73% | 2431 fps | 99.5% |
| Unknown powder | <<locked>> | 98% | 46,731 psi | 85% | 2484 fps | 97.6% |
| Vihtavuori N130 | <<locked>> | 82% | 47,079 psi | 85% | 2306 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,806 psi | 90% | 2359 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 47,108 psi | 85% | 2388 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 48,399 psi | 88% | 2405 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 47,674 psi | 87% | 2421 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,892 psi | 87% | 2474 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 86% | 48,559 psi | 88% | 2421 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 49,690 psi | 90% | 2444 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,862 psi | 85% | 2480 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,066 psi | 89% | 2464 fps | 99.7% |
| Winchester 748 | <<locked>> | 84% | 48,022 psi | 87% | 2467 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 47,732 psi | 87% | 2457 fps | 99.6% |
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% | 41,553 psi | 75% | 2264 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,005 psi | 82% | 2356 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,069 psi | 62% | 2192 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,653 psi | 70% | 2300 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 38,653 psi | 70% | 2300 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 32,213 psi | 58% | 2178 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 34,200 psi | 62% | 2280 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 38,145 psi | 69% | 2277 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 80% | 32,576 psi | 59% | 2146 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,161 psi | 73% | 2290 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 39,131 psi | 71% | 2287 fps | 100% |
| Alliant Power Pro 2000-MR | 58.1 gr | 80% | 34,214 psi | 62% | 2280 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,502 psi | 57% | 2162 fps | 96.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,098 psi | 62% | 2218 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,708 psi | 65% | 2297 fps | 95.4% |
| Alliant Reloder-17 | 60.1 gr | 84% | 31,053 psi | 56% | 2218 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,840 psi | 67% | 2274 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 30,647 psi | 56% | 2159 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,105 psi | 76% | 2283 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,029 psi | 69% | 2303 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,814 psi | 76% | 2418 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 42,496 psi | 77% | 2329 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 36,303 psi | 66% | 2257 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 38,435 psi | 70% | 2290 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,589 psi | 56% | 2159 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,285 psi | 59% | 2211 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,817 psi | 47% | 1325 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,316 psi | 62% | 2192 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 34,200 psi | 62% | 2231 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 31,763 psi | 58% | 2123 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 92% | 45,919 psi | 83% | 2359 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 46,108 psi | 84% | 2392 fps | 95.1% |
| IMR 4831 | <<locked>> | 96% | 34,113 psi | 62% | 2257 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 34,867 psi | 63% | 2244 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 80% | 40,161 psi | 73% | 2290 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 44,672 psi | 81% | 2362 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 36,347 psi | 66% | 2257 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 38,943 psi | 71% | 2228 fps | 97.8% |
| Lovex S062 | <<locked>> | 80% | 33,765 psi | 61% | 2182 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 39,900 psi | 72% | 2300 fps | 95.1% |
| Lovex S070 | <<locked>> | 98% | 45,150 psi | 82% | 2408 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 37,420 psi | 68% | 2241 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 37,434 psi | 68% | 2251 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 33,489 psi | 61% | 2208 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 35,375 psi | 64% | 2290 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 32,808 psi | 60% | 2211 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 98% | 42,018 psi | 76% | 2415 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 39,856 psi | 72% | 2283 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,972 psi | 71% | 2303 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,323 psi | 79% | 2329 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,947 psi | 47% | 1358 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,933 psi | 82% | 2362 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 44,846 psi | 81% | 2382 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 34,896 psi | 63% | 2293 fps | 96.1% |
| ReloadSwiss RS 60 | 57.2 gr | 80% | 29,051 psi | 53% | 2175 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,941 psi | 67% | 2349 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,495 psi | 73% | 2408 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 41,089 psi | 75% | 2280 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,578 psi | 65% | 2195 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 28,950 psi | 53% | 2113 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 39,900 psi | 72% | 2300 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,347 psi | 66% | 2257 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 33,765 psi | 61% | 2182 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 45,150 psi | 82% | 2408 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,097 psi | 58% | 2201 fps | 95.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,768 psi | 69% | 2254 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,521 psi | 66% | 2247 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,088 psi | 71% | 2208 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,053 psi | 58% | 2090 fps | 99.6% |
| Somchem S321 | <<locked>> | 80% | 42,815 psi | 78% | 2356 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 38,566 psi | 70% | 2211 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,536 psi | 68% | 2260 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 30,139 psi | 55% | 2123 fps | 95.6% |
| Somchem S365 | <<locked>> | 88% | 27,847 psi | 51% | 2146 fps | 95.8% |
| Unknown powder | <<locked>> | 92% | 38,667 psi | 70% | 2339 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 44,295 psi | 80% | 2267 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,175 psi | 71% | 2205 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,461 psi | 63% | 2192 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,389 psi | 64% | 2195 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 28,529 psi | 52% | 2070 fps | 96.5% |
| Vihtavuori N160 | <<locked>> | 92% | 37,043 psi | 67% | 2287 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 39,842 psi | 72% | 2280 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 33,852 psi | 61% | 2185 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 36,187 psi | 66% | 2293 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,125 psi | 56% | 2136 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 41,901 psi | 76% | 2375 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,570 psi | 81% | 2408 fps | 99.2% |
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 103 powders for .375 Hoelderlin loaded with the .375 | 285gr | Speer Grand Slam. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,582 fps; across all powders the maximum-charge window runs from 1,486 fps to 2,582 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 285.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .375 Hoelderlin with the .375 | 285gr | Speer Grand Slam they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-26 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.