Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 155gr | CutEdge MTH bullet and 64 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>> | 90% | 57,348 psi | 90% | 3045 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,593 psi | 87% | 3156 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 88% | 56,536 psi | 89% | 3163 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 86% | 55,317 psi | 87% | 3087 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,595 psi | 90% | 3166 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 55,970 psi | 88% | 3133 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,112 psi | 82% | 3173 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 3150 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,506 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,637 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,868 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 53,925 psi | 85% | 3091 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,622 psi | 87% | 3054 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,869 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,130 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3228 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,563 psi | 86% | 3058 fps | 97.9% |
| Bofors RP15 | <<locked>> | 92% | 56,971 psi | 89% | 3140 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 55,332 psi | 87% | 3140 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 53,925 psi | 85% | 3091 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 57,609 psi | 90% | 3156 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,666 psi | 89% | 3091 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,564 psi | 87% | 3074 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,651 psi | 87% | 2989 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,679 psi | 86% | 3215 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 59% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,099 psi | 85% | 3002 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,650 psi | 86% | 3005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,043 psi | 89% | 3068 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 90% | 55,825 psi | 87% | 3143 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,429 psi | 77% | 3058 fps | 99.4% |
| Lovex S070 | <<locked>> | 82% | 56,304 psi | 88% | 3035 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,158 psi | 86% | 3015 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,347 psi | 87% | 3064 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 50,357 psi | 79% | 3084 fps | 100% |
| Norma MRP | <<locked>> | 86% | 53,940 psi | 85% | 3110 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,289 psi | 88% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,811 psi | 89% | 3163 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 55,274 psi | 87% | 3061 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,201 psi | 87% | 3087 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,479 psi | 60% | 2005 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,043 psi | 89% | 3127 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,434 psi | 87% | 3205 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,650 psi | 86% | 3163 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 56,086 psi | 88% | 3058 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 86% | 54,636 psi | 86% | 3064 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,304 psi | 88% | 3035 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,768 psi | 89% | 2982 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,244 psi | 85% | 3061 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 57,421 psi | 90% | 3045 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 57,580 psi | 90% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,766 psi | 86% | 3031 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,696 psi | 90% | 3038 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,766 psi | 86% | 3018 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,566 psi | 90% | 3097 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 82% | 56,971 psi | 89% | 3045 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,537 psi | 90% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,363 psi | 90% | 3176 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 92% | 53,983 psi | 85% | 3097 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 96% | 55,376 psi | 87% | 3166 fps | 99% |
| Vihtavuori N570 | <<locked>> | 98% | 56,637 psi | 89% | 3235 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,392 psi | 90% | 2989 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,288 psi | 87% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,694 psi | 86% | 3028 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% | 40,698 psi | 64% | 2756 fps | 99.7% |
| Accurate High Country | <<locked>> | 80% | 44,817 psi | 70% | 2953 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 80% | 42,351 psi | 66% | 2887 fps | 96.5% |
| ADI AR 2209 | <<locked>> | 80% | 45,092 psi | 71% | 2900 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 40,277 psi | 63% | 2831 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 34,301 psi | 54% | 2680 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 96% | 44,904 psi | 70% | 3015 fps | 95% |
| ADI AR 2225 | <<locked>> | 82% | 29,066 psi | 46% | 2572 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,469 psi | 71% | 2900 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,054 psi | 82% | 3018 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,049 psi | 71% | 2890 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,843 psi | 64% | 2835 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,697 psi | 62% | 2782 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,142 psi | 54% | 2707 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,686 psi | 70% | 2949 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 45,847 psi | 72% | 3009 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 44,991 psi | 71% | 2874 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 37,985 psi | 60% | 2769 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 33,895 psi | 53% | 2690 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 40,843 psi | 64% | 2835 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 80% | 32,489 psi | 51% | 2631 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 42,960 psi | 67% | 2835 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,105 psi | 66% | 2818 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,704 psi | 76% | 2884 fps | 100% |
| Hodgdon Retumbo | 70.2 gr | 80% | 33,373 psi | 52% | 2740 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,079 psi | 44% | 1752 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,792 psi | 80% | 2946 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,995 psi | 80% | 2946 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,164 psi | 69% | 2831 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 80% | 39,044 psi | 61% | 2812 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 34,853 psi | 55% | 2736 fps | 95.5% |
| Lovex S070 | <<locked>> | 80% | 52,678 psi | 83% | 2976 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,925 psi | 55% | 2625 fps | 98.8% |
| Norma 204 | <<locked>> | 80% | 51,677 psi | 81% | 3002 fps | 99.7% |
| Norma 217 | <<locked>> | 86% | 30,458 psi | 48% | 2631 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 43,352 psi | 68% | 2913 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 52,547 psi | 82% | 2992 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,870 psi | 61% | 2818 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 80% | 51,663 psi | 81% | 3002 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,824 psi | 55% | 2690 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,848 psi | 45% | 1795 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,939 psi | 83% | 3061 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,445 psi | 51% | 2710 fps | 97.6% |
| ReloadSwiss RS 80 | 83.3 gr | 88% | 40,132 psi | 63% | 2874 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 46,021 psi | 72% | 2874 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 44,585 psi | 70% | 2881 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 52,678 psi | 83% | 2976 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,069 psi | 83% | 2927 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,251 psi | 69% | 2877 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 46,833 psi | 73% | 2861 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 50,183 psi | 79% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,802 psi | 70% | 2854 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 54,099 psi | 85% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,117 psi | 61% | 2723 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 92% | 50,038 psi | 78% | 2963 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 53,301 psi | 84% | 2989 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,990 psi | 69% | 2858 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,192 psi | 68% | 2907 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 35,534 psi | 56% | 2707 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 41,321 psi | 65% | 2894 fps | 95.9% |
| Vihtavuori N570 | 83.7 gr | 92% | 45,310 psi | 71% | 3015 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,490 psi | 84% | 2933 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,362 psi | 59% | 2831 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,350 psi | 65% | 2782 fps | 98.4% |
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 64 powders for 7-.300 Norma Mag. loaded with the .284 | 155gr | CutEdge MTH. Vihtavuori N570 delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,235 fps. ADI AR 2218 gives the best case fill at 100 %, and 64 of the 64 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 155.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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 | 155gr | CutEdge MTH 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.