Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 150gr | Rhino Solid Shank bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N570.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 57,116 psi | 90% | 3084 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 55,985 psi | 88% | 3192 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 84% | 54,534 psi | 85% | 3117 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 56,594 psi | 89% | 3192 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 96% | 55,477 psi | 87% | 3169 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,811 psi | 87% | 3284 fps | 98.2% |
| ADI AR 2225 | <<locked>> | 98% | 54,375 psi | 85% | 3189 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,682 psi | 90% | 3166 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,043 psi | 89% | 3186 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,245 psi | 87% | 3087 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,564 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,869 psi | 88% | 3179 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,624 psi | 90% | 3264 fps | 98.3% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,055 psi | 83% | 3176 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,188 psi | 90% | 3146 fps | 98.3% |
| Bofors RP15 | <<locked>> | 90% | 56,449 psi | 88% | 3176 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,361 psi | 87% | 3179 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 57,043 psi | 89% | 3186 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,884 psi | 89% | 3189 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,753 psi | 87% | 3120 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 54,723 psi | 86% | 3104 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 54,853 psi | 86% | 3022 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 54,563 psi | 86% | 3255 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 59% | 2011 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,623 psi | 89% | 3087 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,377 psi | 90% | 3091 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,144 psi | 88% | 3097 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 55,056 psi | 86% | 3173 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3163 fps | 99.7% |
| Lovex S071 | <<locked>> | 92% | 55,085 psi | 86% | 3054 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3186 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,363 psi | 90% | 3205 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,362 psi | 88% | 3199 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 90% | 54,781 psi | 86% | 3120 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,696 psi | 61% | 2057 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,405 psi | 87% | 3241 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,708 psi | 86% | 3202 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 55,056 psi | 86% | 3084 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 86% | 57,508 psi | 90% | 3156 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,116 psi | 90% | 3153 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,391 psi | 88% | 3074 fps | 99.4% |
| Somchem S365 | <<locked>> | 82% | 56,826 psi | 89% | 3084 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,201 psi | 85% | 3064 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,259 psi | 85% | 3051 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,942 psi | 89% | 3130 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 86% | 57,174 psi | 90% | 3120 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,768 psi | 89% | 3209 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 92% | 57,595 psi | 90% | 3196 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 94% | 55,288 psi | 87% | 3205 fps | 99% |
| Vihtavuori N570 | <<locked>> | 96% | 56,666 psi | 89% | 3271 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,245 psi | 87% | 3182 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 53,896 psi | 84% | 3058 fps | 99.9% |
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% | 43,584 psi | 68% | 2851 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 45,194 psi | 71% | 2986 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 80% | 47,616 psi | 75% | 2989 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 42,859 psi | 67% | 2927 fps | 97.7% |
| ADI AR 2217 | <<locked>> | 82% | 34,171 psi | 54% | 2710 fps | 95% |
| ADI AR 2218 | <<locked>> | 96% | 48,167 psi | 75% | 3127 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 29,312 psi | 46% | 2608 fps | 95.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,485 psi | 74% | 2982 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,613 psi | 68% | 2933 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,366 psi | 66% | 2867 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,666 psi | 57% | 2802 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,066 psi | 75% | 3048 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 45,919 psi | 72% | 3041 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 98% | 49,182 psi | 77% | 3100 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,150 psi | 69% | 2897 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 40,596 psi | 64% | 2864 fps | 98.1% |
| Bofors RP30 | <<locked>> | 80% | 34,185 psi | 54% | 2726 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 43,613 psi | 68% | 2933 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 34,693 psi | 54% | 2726 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 45,455 psi | 71% | 2927 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,614 psi | 70% | 2910 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,358 psi | 80% | 2969 fps | 100% |
| Hodgdon Retumbo | 74 gr | 80% | 35,810 psi | 56% | 2841 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 44% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,200 psi | 83% | 3031 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,838 psi | 84% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,369 psi | 73% | 2917 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 80% | 41,568 psi | 65% | 2907 fps | 97.4% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,317 psi | 55% | 2776 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 37,579 psi | 59% | 2720 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 31,009 psi | 49% | 2674 fps | 96% |
| Norma MRP | <<locked>> | 80% | 46,354 psi | 73% | 3009 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 41,771 psi | 65% | 2923 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 80% | 37,594 psi | 59% | 2789 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,095 psi | 46% | 1844 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,099 psi | 55% | 2815 fps | 98.5% |
| ReloadSwiss RS 80 | 85.8 gr | 86% | 40,306 psi | 63% | 2910 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 48,428 psi | 76% | 2963 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 47,065 psi | 74% | 2969 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,717 psi | 73% | 2966 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 49,371 psi | 77% | 2949 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 53,200 psi | 83% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,543 psi | 75% | 2943 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 41,582 psi | 65% | 2815 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 92% | 53,229 psi | 83% | 3064 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 47,036 psi | 74% | 2953 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,006 psi | 72% | 3002 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 38,261 psi | 60% | 2808 fps | 96% |
| Vihtavuori N568 | <<locked>> | 86% | 41,495 psi | 65% | 2927 fps | 95.7% |
| Vihtavuori N570 | 88.3 gr | 92% | 48,907 psi | 77% | 3127 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,669 psi | 64% | 2930 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,859 psi | 69% | 2874 fps | 98.9% |
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 59 powders for 7-.300 Norma Mag. loaded with the .284 | 150gr | Rhino Solid Shank. ADI AR 2218 delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 2,011 fps to 3,284 fps. Accurate 8700 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, Alliant Reloder-50 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. Hodgdon Retumbo, ReloadSwiss RS 80, Vihtavuori N570 rank at the top here: for 7-.300 Norma Mag. with the .284 | 150gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.