Load Specifications
Load data in caliber 8 mm Rem. Mag. with .323 | 250gr | Woodleigh RN SN bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO and Norma MRP.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 57,377 psi | 86% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 58,900 psi | 88% | 2641 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 59,785 psi | 90% | 2776 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 84% | 59,973 psi | 90% | 2595 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 59,582 psi | 89% | 2703 fps | 100% |
| ADI AR 2213 | <<locked>> | 96% | 57,232 psi | 86% | 2717 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,776 psi | 72% | 2572 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,511 psi | 64% | 2543 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,740 psi | 87% | 2569 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 59,843 psi | 90% | 2690 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,159 psi | 86% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 58,943 psi | 88% | 2694 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,087 psi | 86% | 2710 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 98% | 58,001 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,476 psi | 80% | 2684 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 58,842 psi | 88% | 2766 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 58,726 psi | 88% | 2677 fps | 98% |
| Bofors RP15ᴾ | <<locked>> | 100% | 59,582 psi | 89% | 2743 fps | 100% |
| Bofors RP3 | <<locked>> | 82% | 59,059 psi | 89% | 2589 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,676 psi | 74% | 2641 fps | 99.3% |
| Bofors RP5 | <<locked>> | 96% | 57,087 psi | 86% | 2710 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 57,653 psi | 86% | 2595 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,591 psi | 79% | 2648 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 82% | 59,045 psi | 89% | 2612 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 56,811 psi | 85% | 2648 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 59,669 psi | 89% | 2657 fps | 100% |
| Hodgdon H4831 | <<locked>> | 94% | 57,276 psi | 86% | 2657 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 59,959 psi | 90% | 2694 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 59,988 psi | 90% | 2612 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,605 psi | 79% | 2756 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 57,159 psi | 86% | 2687 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 56% | 1588 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 59,451 psi | 89% | 2575 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 59,146 psi | 89% | 2631 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 86% | 59,219 psi | 89% | 2615 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 59,045 psi | 89% | 2631 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 58,204 psi | 87% | 2638 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 98% | 58,639 psi | 88% | 2746 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 38,174 psi | 57% | 2457 fps | 96.8% |
| Lovex S062 | <<locked>> | 82% | 59,828 psi | 90% | 2566 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 59,669 psi | 89% | 2608 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,899 psi | 87% | 2612 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,491 psi | 82% | 2585 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,652 psi | 85% | 2641 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 38,130 psi | 57% | 2480 fps | 98.9% |
| Norma MRP | <<locked>> | 94% | 56,927 psi | 85% | 2730 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,261 psi | 86% | 2628 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 59,828 psi | 90% | 2772 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 90% | 59,814 psi | 90% | 2687 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,841 psi | 87% | 2707 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,927 psi | 57% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 58,465 psi | 88% | 2602 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,855 psi | 85% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 58,900 psi | 88% | 2667 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,159 psi | 86% | 2697 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,910 psi | 79% | 2753 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,819 psi | 72% | 2651 fps | 98% |
| Rottweil R 903 | <<locked>> | 84% | 59,161 psi | 89% | 2585 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,043 psi | 86% | 2625 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 94% | 58,392 psi | 88% | 2684 fps | 100% |
| Rottweil R 907 | <<locked>> | 86% | 57,653 psi | 86% | 2595 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 88% | 59,669 psi | 89% | 2608 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 59,828 psi | 90% | 2566 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,899 psi | 87% | 2612 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,840 psi | 85% | 2595 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 59,016 psi | 88% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 59,234 psi | 89% | 2572 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,928 psi | 87% | 2677 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 58,711 psi | 88% | 2579 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 58,653 psi | 88% | 2621 fps | 99.3% |
| Somchem S365 | <<locked>> | 90% | 57,566 psi | 86% | 2625 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 58,958 psi | 88% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 59,901 psi | 90% | 2549 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 59,059 psi | 89% | 2615 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 58,392 psi | 88% | 2638 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 58,131 psi | 87% | 2625 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,971 psi | 85% | 2651 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,811 psi | 85% | 2733 fps | 99.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,275 psi | 84% | 2710 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,226 psi | 74% | 2657 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 58,479 psi | 88% | 2579 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,058 psi | 86% | 2651 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 59,828 psi | 90% | 2802 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 59,117 psi | 89% | 2657 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 33,634 psi | 50% | 2234 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 45,107 psi | 68% | 2451 fps | 100% |
| Accurate MAGPRO | 69.4 gr | 84% | 39,262 psi | 59% | 2438 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 53,142 psi | 80% | 2507 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,724 psi | 57% | 2349 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 35,955 psi | 54% | 2339 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 36,883 psi | 55% | 2362 fps | 96% |
| ADI AR 2225 | <<locked>> | 88% | 29,124 psi | 44% | 2224 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,360 psi | 81% | 2526 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,323 psi | 65% | 2457 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,908 psi | 75% | 2562 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,695 psi | 56% | 2346 fps | 97.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,533 psi | 50% | 2297 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,372 psi | 49% | 2264 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,210 psi | 42% | 2188 fps | 97.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,070 psi | 53% | 2392 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 46,137 psi | 69% | 2477 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 31,227 psi | 47% | 2238 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 55,303 psi | 83% | 2543 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 33,257 psi | 50% | 2323 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 33,533 psi | 50% | 2297 fps | 96.2% |
| Bofors RP7 | <<locked>> | 80% | 48,051 psi | 72% | 2454 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 32,967 psi | 49% | 2270 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 55,347 psi | 83% | 2566 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 46,688 psi | 70% | 2500 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 49,400 psi | 74% | 2510 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 38,334 psi | 57% | 2343 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 82% | 37,681 psi | 56% | 2333 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,901 psi | 61% | 2352 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 31,299 psi | 47% | 2310 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 46,079 psi | 69% | 2526 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 42% | 1417 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 55,956 psi | 84% | 2533 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,482 psi | 65% | 2398 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,342 psi | 74% | 2477 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 42,960 psi | 64% | 2405 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 37,739 psi | 57% | 2297 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 36,854 psi | 55% | 2372 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 33,533 psi | 50% | 2349 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 56,347 psi | 84% | 2523 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 46,963 psi | 70% | 2431 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,121 psi | 68% | 2425 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 29,008 psi | 43% | 2129 fps | 97.1% |
| Norma 204 | <<locked>> | 80% | 43,236 psi | 65% | 2431 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 29,515 psi | 44% | 2270 fps | 95.7% |
| Norma MRP | 64.9 gr | 80% | 34,911 psi | 52% | 2356 fps | 98% |
| Norma URP | <<locked>> | 80% | 44,251 psi | 66% | 2441 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 33,968 psi | 51% | 2320 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 43,018 psi | 64% | 2441 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 30,153 psi | 45% | 2215 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,500 psi | 43% | 1450 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,853 psi | 82% | 2552 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,026 psi | 79% | 2595 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,976 psi | 67% | 2474 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,178 psi | 65% | 2493 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 28,195 psi | 42% | 2228 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 38,377 psi | 58% | 2474 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 52,083 psi | 78% | 2497 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,030 psi | 59% | 2326 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 80% | 36,941 psi | 55% | 2329 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,051 psi | 72% | 2454 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,963 psi | 70% | 2431 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 56,347 psi | 84% | 2523 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,121 psi | 68% | 2425 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,301 psi | 80% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,199 psi | 78% | 2379 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,788 psi | 69% | 2382 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,608 psi | 55% | 2326 fps | 97.2% |
| Somchem S355 | <<locked>> | 80% | 52,054 psi | 78% | 2493 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 39,668 psi | 59% | 2320 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 41,292 psi | 62% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,594 psi | 56% | 2316 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 80% | 49,632 psi | 74% | 2421 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,730 psi | 69% | 2434 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,503 psi | 49% | 2205 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,121 psi | 68% | 2441 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,260 psi | 54% | 2329 fps | 100% |
| Vihtavuori N560 | 66.5 gr | 82% | 37,666 psi | 56% | 2402 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 86% | 35,172 psi | 53% | 2343 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 94% | 40,001 psi | 60% | 2487 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,556 psi | 67% | 2398 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,862 psi | 70% | 2500 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,601 psi | 43% | 2287 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,156 psi | 51% | 2247 fps | 96.2% |
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 89 powders for 8 mm Rem. Mag. loaded with the .323 | 250gr | Woodleigh RN SN. Winchester StaBALL HD delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,802 fps. ADI AR 2217 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.323" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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. Vihtavuori N560, Accurate MAGPRO, Norma MRP rank at the top here: for 8 mm Rem. Mag. with the .323 | 250gr | Woodleigh RN SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-33, IMR 7977 Enduron 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.