Load Specifications
Load data in caliber .375 Hoelderlin with .375 | 270gr | Impala RNFP KO bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 52 and Alliant Power Pro 2000-MR.
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>> | 86% | 49,719 psi | 90% | 2408 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 47,993 psi | 87% | 2425 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 47,601 psi | 86% | 2434 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,689 psi | 88% | 2477 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 47,007 psi | 85% | 2461 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,193 psi | 80% | 2487 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 88% | 48,095 psi | 87% | 2474 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 94% | 48,849 psi | 89% | 2467 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 47,529 psi | 86% | 2438 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 88% | 49,719 psi | 90% | 2474 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 48,573 psi | 88% | 2523 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 49,734 psi | 90% | 2602 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,080 psi | 87% | 2493 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,661 psi | 90% | 2415 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 48,863 psi | 89% | 2507 fps | 98.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,643 psi | 81% | 2490 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 47,674 psi | 87% | 2575 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 46,963 psi | 85% | 2477 fps | 97.5% |
| Bofors RP3 | <<locked>> | 94% | 48,008 psi | 87% | 2503 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,108 psi | 85% | 2385 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 88% | 48,950 psi | 89% | 2510 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 84% | 46,891 psi | 85% | 2530 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 82% | 47,979 psi | 87% | 2441 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 48,617 psi | 88% | 2464 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 49,472 psi | 90% | 2507 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 88% | 48,457 psi | 88% | 2484 fps | 99.1% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,017 psi | 74% | 2392 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 49,313 psi | 89% | 2549 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,882 psi | 63% | 1506 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 49,574 psi | 90% | 2487 fps | 99.2% |
| IMR 3031 | <<locked>> | 88% | 47,369 psi | 86% | 2484 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,428 psi | 88% | 2454 fps | 98.3% |
| IMR 4198 | <<locked>> | 82% | 49,690 psi | 90% | 2375 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,583 psi | 77% | 2441 fps | 96.5% |
| IMR 4895 | <<locked>> | 90% | 46,934 psi | 85% | 2490 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 86% | 47,529 psi | 86% | 2438 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 82% | 47,703 psi | 87% | 2428 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 88% | 46,963 psi | 85% | 2461 fps | 99.9% |
| Lovex S060 | <<locked>> | 88% | 48,733 psi | 88% | 2415 fps | 98.7% |
| Lovex S062 | <<locked>> | 92% | 48,153 psi | 87% | 2461 fps | 99.5% |
| Lovex S065 | <<locked>> | 98% | 47,181 psi | 86% | 2441 fps | 95.8% |
| Norma 201 | <<locked>> | 88% | 47,718 psi | 87% | 2438 fps | 99.4% |
| Norma 202 | <<locked>> | 88% | 47,398 psi | 86% | 2444 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,109 psi | 87% | 2500 fps | 98.7% |
| Norma URPᴾ | <<locked>> | 100% | 44,483 psi | 81% | 2480 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 92% | 47,674 psi | 87% | 2513 fps | 98.5% |
| Ramshot TAC | <<locked>> | 86% | 47,674 psi | 87% | 2438 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 49,719 psi | 90% | 2507 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 48,602 psi | 88% | 2434 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,433 psi | 64% | 1545 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 47,369 psi | 86% | 2428 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 47,776 psi | 87% | 2556 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 47,601 psi | 86% | 2585 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,019 psi | 80% | 2500 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 86% | 49,472 psi | 90% | 2431 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 47,964 psi | 87% | 2431 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 96% | 47,906 psi | 87% | 2493 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,181 psi | 86% | 2441 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 46,963 psi | 85% | 2461 fps | 99.9% |
| Shooters World Precision | <<locked>> | 92% | 48,153 psi | 87% | 2461 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 48,994 psi | 89% | 2539 fps | 98.7% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 49,835 psi | 90% | 2425 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 48,849 psi | 89% | 2464 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 49,385 psi | 90% | 2493 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,327 psi | 90% | 2388 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 48,356 psi | 88% | 2385 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 48,254 psi | 88% | 2467 fps | 99.6% |
| Somchem S335 | <<locked>> | 88% | 48,733 psi | 88% | 2395 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 48,051 psi | 87% | 2461 fps | 98.5% |
| Somchem S355 | <<locked>> | 96% | 48,675 psi | 88% | 2493 fps | 99.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,827 psi | 72% | 2438 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 84% | 49,371 psi | 90% | 2365 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,052 psi | 89% | 2382 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 49,385 psi | 90% | 2451 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 47,587 psi | 86% | 2425 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 49,676 psi | 90% | 2477 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,775 psi | 85% | 2480 fps | 97% |
| Vihtavuori N530 | <<locked>> | 86% | 47,732 psi | 87% | 2434 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 92% | 48,878 psi | 89% | 2464 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,643 psi | 83% | 2487 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,950 psi | 87% | 2467 fps | 98.9% |
| Winchester 748 | <<locked>> | 88% | 49,458 psi | 90% | 2520 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 48,501 psi | 88% | 2497 fps | 99.1% |
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% | 41,785 psi | 76% | 2290 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,078 psi | 82% | 2382 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 35,447 psi | 64% | 2234 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,306 psi | 73% | 2343 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 33,417 psi | 61% | 2218 fps | 99.1% |
| Accurate 4350 | <<locked>> | 96% | 38,972 psi | 71% | 2395 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 38,145 psi | 69% | 2293 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 36,637 psi | 66% | 2251 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,900 psi | 72% | 2306 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 38,682 psi | 70% | 2313 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,716 psi | 83% | 2477 fps | 98.8% |
| Alliant Power Pro 2000-MR | 58.5 gr | 84% | 38,740 psi | 70% | 2392 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,821 psi | 58% | 2188 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,963 psi | 85% | 2375 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,289 psi | 66% | 2280 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,784 psi | 72% | 2395 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,360 psi | 64% | 2329 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,059 psi | 71% | 2333 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 31,430 psi | 57% | 2188 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,032 psi | 76% | 2303 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,014 psi | 69% | 2323 fps | 98.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,176 psi | 75% | 2428 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 80% | 45,078 psi | 82% | 2398 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,658 psi | 83% | 2418 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 41,191 psi | 75% | 2365 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,377 psi | 70% | 2306 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,679 psi | 63% | 2260 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,272 psi | 62% | 2270 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 47% | 1345 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,767 psi | 67% | 2260 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 36,999 psi | 67% | 2310 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,201 psi | 66% | 2234 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 46,905 psi | 85% | 2336 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 37,826 psi | 69% | 2349 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 34,954 psi | 63% | 2264 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 39,900 psi | 72% | 2306 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 80% | 44,831 psi | 81% | 2385 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 36,666 psi | 67% | 2283 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 38,914 psi | 71% | 2244 fps | 96.8% |
| Lovex S062 | <<locked>> | 80% | 34,229 psi | 62% | 2205 fps | 96.9% |
| Lovex S065 | <<locked>> | 96% | 44,512 psi | 81% | 2395 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 37,971 psi | 69% | 2264 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 37,579 psi | 68% | 2277 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 33,692 psi | 61% | 2228 fps | 95.2% |
| Norma URP | <<locked>> | 96% | 39,581 psi | 72% | 2388 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 35,041 psi | 64% | 2274 fps | 95.2% |
| Ramshot TAC | <<locked>> | 84% | 44,904 psi | 81% | 2392 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,725 psi | 70% | 2320 fps | 96.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,033 psi | 78% | 2343 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 48% | 1378 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,440 psi | 81% | 2382 fps | 99.7% |
| ReloadSwiss RS 52 | 55.4 gr | 82% | 37,217 psi | 68% | 2359 fps | 95.7% |
| ReloadSwiss RS 60 | 54.9 gr | 80% | 29,602 psi | 54% | 2192 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 41,336 psi | 75% | 2451 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 42,032 psi | 76% | 2313 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 36,230 psi | 66% | 2221 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 31,459 psi | 57% | 2182 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 44,512 psi | 81% | 2395 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,666 psi | 67% | 2283 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 34,229 psi | 62% | 2205 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,345 psi | 62% | 2264 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,123 psi | 86% | 2385 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 43,062 psi | 78% | 2369 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,550 psi | 66% | 2264 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,291 psi | 71% | 2231 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,358 psi | 59% | 2116 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 42,656 psi | 77% | 2375 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 38,885 psi | 71% | 2238 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,376 psi | 68% | 2274 fps | 96.2% |
| Somchem S355 | <<locked>> | 82% | 32,648 psi | 59% | 2195 fps | 95.4% |
| Somchem S365 | <<locked>> | 90% | 30,037 psi | 55% | 2208 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 44,237 psi | 80% | 2293 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,146 psi | 71% | 2231 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,766 psi | 63% | 2218 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,317 psi | 64% | 2215 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 28,993 psi | 53% | 2093 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 94% | 39,218 psi | 71% | 2346 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 39,885 psi | 72% | 2303 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 80% | 34,084 psi | 62% | 2208 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 96% | 40,495 psi | 73% | 2395 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,286 psi | 60% | 2192 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 38,580 psi | 70% | 2339 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,723 psi | 65% | 2270 fps | 96.5% |
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 101 powders for .375 Hoelderlin loaded with the .375 | 270gr | Impala RNFP KO. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,506 fps to 2,602 fps. Accurate 4350 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 60, ReloadSwiss RS 52, Alliant Power Pro 2000-MR rank at the top here: for .375 Hoelderlin with the .375 | 270gr | Impala RNFP KO they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Bofors RP7 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.