Load Specifications
Load data in caliber .300 Win. Mag. with .310 | 215gr | Rhino Solid Shank bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Accurate MAGPRO and Alliant Reloder-26.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 53,084 psi | 85% | 2520 fps | 99.6% |
| Accurate 3100 | <<locked>> | 96% | 54,940 psi | 88% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 53,069 psi | 85% | 2602 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 53,983 psi | 87% | 2713 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 54,955 psi | 88% | 2566 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,737 psi | 86% | 2651 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 55,114 psi | 88% | 2710 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,977 psi | 74% | 2556 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,872 psi | 66% | 2523 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,985 psi | 90% | 2585 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,998 psi | 87% | 2651 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,984 psi | 88% | 2664 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,417 psi | 86% | 2644 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,839 psi | 88% | 2707 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,695 psi | 89% | 2674 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,430 psi | 82% | 2684 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,043 psi | 90% | 2762 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,635 psi | 86% | 2621 fps | 95.9% |
| Bofors RP15 | <<locked>> | 98% | 53,780 psi | 86% | 2690 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 2625 fps | 98.2% |
| Bofors RP5 | <<locked>> | 96% | 54,839 psi | 88% | 2707 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 56,028 psi | 90% | 2602 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,253 psi | 76% | 2582 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 55,854 psi | 90% | 2664 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 56,362 psi | 90% | 2644 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 98% | 54,433 psi | 87% | 2644 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,925 psi | 86% | 2635 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,404 psi | 87% | 2582 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,459 psi | 81% | 2743 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 55,158 psi | 88% | 2690 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 59% | 1608 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,867 psi | 86% | 2539 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,883 psi | 90% | 2575 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 53,896 psi | 86% | 2589 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,157 psi | 87% | 2575 fps | 99.9% |
| IMR 4831 | <<locked>> | 92% | 54,737 psi | 88% | 2612 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,304 psi | 90% | 2635 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 52,982 psi | 85% | 2690 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 54,592 psi | 88% | 2575 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,130 psi | 90% | 2621 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,402 psi | 84% | 2585 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,665 psi | 88% | 2641 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 36,347 psi | 58% | 2454 fps | 97.2% |
| Norma MRP | <<locked>> | 94% | 54,476 psi | 87% | 2726 fps | 100% |
| Norma URP | <<locked>> | 88% | 55,361 psi | 89% | 2635 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 52,707 psi | 85% | 2697 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,056 psi | 87% | 2644 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,272 psi | 85% | 2674 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,753 psi | 61% | 1650 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,476 psi | 87% | 2654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 52,910 psi | 85% | 2625 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,824 psi | 88% | 2700 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,618 psi | 81% | 2740 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,513 psi | 73% | 2628 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 82% | 53,664 psi | 86% | 2552 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,361 psi | 89% | 2628 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 94% | 56,347 psi | 90% | 2684 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 86% | 56,028 psi | 90% | 2602 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,592 psi | 88% | 2575 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,130 psi | 90% | 2621 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,129 psi | 88% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,983 psi | 87% | 2438 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,693 psi | 86% | 2530 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,883 psi | 90% | 2680 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 53,548 psi | 86% | 2549 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,084 psi | 85% | 2569 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 55,274 psi | 89% | 2638 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 53,330 psi | 86% | 2608 fps | 99.7% |
| Unknown powder | <<locked>> | 86% | 55,550 psi | 89% | 2638 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,274 psi | 89% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,985 psi | 90% | 2608 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,389 psi | 87% | 2615 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,289 psi | 90% | 2651 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,650 psi | 88% | 2654 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,013 psi | 88% | 2733 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2700 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 46,876 psi | 75% | 2635 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 52,924 psi | 85% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,854 psi | 90% | 2664 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 52,431 psi | 84% | 2753 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,520 psi | 87% | 2625 fps | 99.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 49,705 psi | 80% | 2470 fps | 99.3% |
| Accurate 3100 | <<locked>> | 80% | 32,314 psi | 52% | 2224 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 43,497 psi | 70% | 2454 fps | 100% |
| Accurate MAGPRO | 69.5 gr | 92% | 47,050 psi | 75% | 2598 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 51,619 psi | 83% | 2520 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,274 psi | 58% | 2333 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 39,508 psi | 63% | 2431 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 96% | 40,364 psi | 65% | 2448 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 31,647 psi | 51% | 2303 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,634 psi | 84% | 2539 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,742 psi | 67% | 2461 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,776 psi | 77% | 2566 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,405 psi | 58% | 2336 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 34,360 psi | 55% | 2333 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,966 psi | 50% | 2251 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,079 psi | 43% | 2162 fps | 95.2% |
| Alliant Reloder-26 | 61.1 gr | 80% | 33,431 psi | 54% | 2369 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 50,459 psi | 81% | 2569 fps | 95% |
| Bofors RP15 | <<locked>> | 86% | 36,550 psi | 59% | 2379 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 36,318 psi | 58% | 2408 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 34,360 psi | 55% | 2333 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 46,499 psi | 75% | 2454 fps | 99% |
| Hodgdon H1000 | <<locked>> | 94% | 38,856 psi | 62% | 2418 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 48,834 psi | 78% | 2559 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 43,947 psi | 70% | 2444 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 90% | 42,206 psi | 68% | 2441 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 41,423 psi | 66% | 2425 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,305 psi | 63% | 2352 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 34,185 psi | 55% | 2395 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 44,135 psi | 71% | 2516 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 45% | 1440 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,807 psi | 81% | 2497 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,429 psi | 79% | 2480 fps | 99.6% |
| IMR 4350 | <<locked>> | 80% | 41,945 psi | 67% | 2395 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,892 psi | 77% | 2480 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 37,594 psi | 60% | 2333 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 84% | 41,379 psi | 66% | 2388 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 40,466 psi | 65% | 2464 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,411 psi | 73% | 2434 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 43,642 psi | 70% | 2421 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 27,876 psi | 45% | 2116 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 41,742 psi | 67% | 2428 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 31,966 psi | 51% | 2343 fps | 95.3% |
| Norma MRP | 59.3 gr | 80% | 33,460 psi | 54% | 2336 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 42,656 psi | 68% | 2441 fps | 99.9% |
| Ramshot Grand | <<locked>> | 84% | 39,146 psi | 63% | 2451 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 41,495 psi | 67% | 2438 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 84% | 34,040 psi | 55% | 2323 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,253 psi | 45% | 1470 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,705 psi | 81% | 2602 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,265 psi | 69% | 2474 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,553 psi | 67% | 2487 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 31,067 psi | 50% | 2313 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 42,192 psi | 68% | 2562 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,343 psi | 81% | 2507 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,364 psi | 65% | 2372 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 35,534 psi | 57% | 2320 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 46,499 psi | 75% | 2454 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,411 psi | 73% | 2434 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 43,642 psi | 70% | 2421 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,590 psi | 83% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,879 psi | 82% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,498 psi | 71% | 2388 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,215 psi | 56% | 2313 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,328 psi | 81% | 2503 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 40,944 psi | 66% | 2362 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,479 psi | 63% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,216 psi | 58% | 2310 fps | 96.8% |
| Unknown powder | <<locked>> | 80% | 45,890 psi | 74% | 2490 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,279 psi | 69% | 2362 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,832 psi | 73% | 2461 fps | 100% |
| Vihtavuori N165 | <<locked>> | 84% | 34,519 psi | 55% | 2267 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 46,514 psi | 75% | 2503 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 34,650 psi | 56% | 2316 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 88% | 42,105 psi | 68% | 2510 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 92% | 41,220 psi | 66% | 2484 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 98% | 43,932 psi | 70% | 2579 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,062 psi | 69% | 2405 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,834 psi | 78% | 2559 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,427 psi | 44% | 2260 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,708 psi | 57% | 2300 fps | 95.5% |
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 81 powders for .300 Win. Mag. loaded with the .310 | 215gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 2,762 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,762 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 215.0 gr projectile in 0.31" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Norma MRP, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .310 | 215gr | Rhino Solid Shank 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.