Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 152gr | Barnes LRX BT bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 and ReloadSwiss RS 76.
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% | 56,884 psi | 89% | 3064 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,479 psi | 90% | 3091 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,114 psi | 86% | 3173 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 88% | 55,999 psi | 88% | 3179 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 86% | 54,969 psi | 86% | 3107 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 57,101 psi | 89% | 3182 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 55,361 psi | 87% | 3150 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,677 psi | 81% | 3186 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3169 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,114 psi | 86% | 3100 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,100 psi | 86% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,520 psi | 85% | 3094 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,319 psi | 90% | 3173 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,187 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,303 psi | 87% | 3150 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,796 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3241 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,114 psi | 85% | 3074 fps | 97.7% |
| Bofors RP15 | <<locked>> | 92% | 56,492 psi | 89% | 3159 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 54,969 psi | 86% | 3159 fps | 99.8% |
| Bofors RP5 | <<locked>> | 90% | 57,319 psi | 90% | 3173 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,029 psi | 89% | 3176 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,246 psi | 88% | 3110 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,158 psi | 86% | 3091 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,100 psi | 86% | 3009 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,288 psi | 85% | 3235 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1978 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,276 psi | 90% | 3077 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,114 psi | 85% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,666 psi | 89% | 3087 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 55,332 psi | 87% | 3163 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,081 psi | 77% | 3074 fps | 99.2% |
| Lovex S065 | <<locked>> | 82% | 57,363 psi | 90% | 3051 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,811 psi | 87% | 3054 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,737 psi | 86% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,810 psi | 86% | 3081 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 49,908 psi | 78% | 3100 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,334 psi | 90% | 3189 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,753 psi | 87% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,463 psi | 88% | 3186 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 54,723 psi | 86% | 3077 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,607 psi | 86% | 3104 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,464 psi | 60% | 2024 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,608 psi | 89% | 3146 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,940 psi | 86% | 3222 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,172 psi | 85% | 3179 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 86% | 55,550 psi | 87% | 3071 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 86% | 54,070 psi | 85% | 3084 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,363 psi | 90% | 3051 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,811 psi | 87% | 3054 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,304 psi | 88% | 3005 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,537 psi | 90% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,000 psi | 89% | 3064 fps | 99.4% |
| Somchem S365 | <<locked>> | 84% | 56,985 psi | 89% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,404 psi | 85% | 3051 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,377 psi | 90% | 3061 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,346 psi | 85% | 3035 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,971 psi | 89% | 3110 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 82% | 56,420 psi | 88% | 3064 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,898 psi | 89% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,855 psi | 89% | 3192 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 57,493 psi | 90% | 3179 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 96% | 54,940 psi | 86% | 3182 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 98% | 56,144 psi | 88% | 3248 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,014 psi | 89% | 3009 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,650 psi | 86% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,273 psi | 85% | 3048 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% | 40,263 psi | 63% | 2769 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 53,534 psi | 84% | 3028 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,469 psi | 70% | 2969 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 80% | 42,032 psi | 66% | 2904 fps | 96.2% |
| ADI AR 2209 | <<locked>> | 80% | 44,643 psi | 70% | 2913 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 40,001 psi | 63% | 2848 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 86% | 36,419 psi | 57% | 2756 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 98% | 47,892 psi | 75% | 3104 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 82% | 28,834 psi | 45% | 2582 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,034 psi | 71% | 2913 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,547 psi | 81% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,614 psi | 70% | 2907 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,582 psi | 64% | 2854 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,276 psi | 62% | 2799 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,750 psi | 53% | 2717 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,251 psi | 69% | 2969 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 45,266 psi | 71% | 3018 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 44,556 psi | 70% | 2887 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 37,724 psi | 59% | 2785 fps | 97.2% |
| Bofors RP30 | <<locked>> | 84% | 36,027 psi | 56% | 2769 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 40,582 psi | 64% | 2854 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 82% | 34,548 psi | 54% | 2710 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 42,685 psi | 67% | 2854 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,872 psi | 66% | 2835 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,269 psi | 76% | 2904 fps | 100% |
| Hodgdon Retumbo | 70.6 gr | 80% | 32,996 psi | 52% | 2749 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,372 psi | 79% | 2966 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 50,749 psi | 80% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,772 psi | 69% | 2844 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 38,624 psi | 61% | 2825 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 34,505 psi | 54% | 2749 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 53,911 psi | 84% | 2999 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,417 psi | 82% | 2999 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,563 psi | 54% | 2638 fps | 98.5% |
| Norma 204 | <<locked>> | 80% | 51,169 psi | 80% | 3018 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 30,023 psi | 47% | 2638 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 43,004 psi | 67% | 2930 fps | 99.5% |
| Norma URP | <<locked>> | 80% | 52,257 psi | 82% | 3015 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,566 psi | 60% | 2835 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 80% | 51,169 psi | 80% | 3018 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,374 psi | 54% | 2700 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1811 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,533 psi | 82% | 3081 fps | 100% |
| ReloadSwiss RS 76 | 75.6 gr | 80% | 32,169 psi | 50% | 2720 fps | 97.2% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 39,639 psi | 62% | 2887 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 45,629 psi | 72% | 2890 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 44,150 psi | 69% | 2897 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,911 psi | 84% | 2999 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,417 psi | 82% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,794 psi | 83% | 2949 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,816 psi | 69% | 2894 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 46,557 psi | 73% | 2877 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 49,676 psi | 78% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,512 psi | 70% | 2871 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 53,635 psi | 84% | 3002 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,725 psi | 61% | 2736 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 53,243 psi | 83% | 3045 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 53,011 psi | 83% | 3012 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,700 psi | 68% | 2877 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,859 psi | 67% | 2923 fps | 97.1% |
| Vihtavuori N565 | <<locked>> | 82% | 37,695 psi | 59% | 2785 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 40,915 psi | 64% | 2904 fps | 95.5% |
| Vihtavuori N570 | 86.1 gr | 94% | 48,385 psi | 76% | 3104 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,156 psi | 83% | 2953 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,796 psi | 58% | 2844 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,886 psi | 64% | 2795 fps | 98.2% |
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 67 powders for 7-.300 Norma Mag. loaded with the .284 | 152gr | Barnes LRX BT. Vihtavuori N570 delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 1,978 fps to 3,248 fps. ADI AR 2218 gives the best case fill at 100 %, and 67 of the 67 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 152.0 gr projectile in 0.284" calls for a 1:9.0 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, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for 7-.300 Norma Mag. with the .284 | 152gr | Barnes LRX BT 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.