Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 130gr | Speer Boat-Tail bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Alliant Reloder-16.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 54,868 psi | 90% | 3100 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 53,664 psi | 88% | 3146 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 54,389 psi | 89% | 3087 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 51,648 psi | 85% | 3143 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 54,041 psi | 89% | 3117 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,736 psi | 87% | 3186 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 98% | 53,998 psi | 89% | 3238 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,013 psi | 90% | 3143 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,576 psi | 86% | 3205 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,577 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,301 psi | 86% | 3176 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,229 psi | 87% | 3235 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,824 psi | 88% | 3219 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,760 psi | 77% | 3146 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,172 psi | 89% | 3310 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,170 psi | 86% | 3215 fps | 97.8% |
| Bofors RP3 | <<locked>> | 82% | 52,402 psi | 86% | 3104 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,229 psi | 87% | 3235 fps | 98.1% |
| Bofors RP7 | <<locked>> | 86% | 51,851 psi | 85% | 3087 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 52,794 psi | 87% | 3123 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 53,824 psi | 88% | 3199 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 53,272 psi | 87% | 3150 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 96% | 54,070 psi | 89% | 3179 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,084 psi | 87% | 3159 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,794 psi | 87% | 3123 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,803 psi | 75% | 3179 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,896 psi | 88% | 3228 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,506 psi | 60% | 2008 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,490 psi | 88% | 3100 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,011 psi | 87% | 3123 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,388 psi | 88% | 3117 fps | 99% |
| IMR 4831 | <<locked>> | 90% | 52,199 psi | 86% | 3133 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,272 psi | 86% | 3110 fps | 96% |
| IMR 7828 SSC | <<locked>> | 98% | 51,663 psi | 85% | 3209 fps | 96.5% |
| Lovex S062 | <<locked>> | 82% | 53,969 psi | 89% | 3097 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,606 psi | 88% | 3114 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 51,677 psi | 85% | 3104 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,674 psi | 78% | 3045 fps | 99% |
| Norma 203B | <<locked>> | 82% | 54,607 psi | 90% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,708 psi | 88% | 3176 fps | 97.8% |
| Norma MRP | <<locked>> | 96% | 52,823 psi | 87% | 3261 fps | 99.1% |
| Norma URP | <<locked>> | 90% | 54,099 psi | 89% | 3189 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,851 psi | 85% | 3222 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 90% | 52,881 psi | 87% | 3182 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,009 psi | 82% | 3153 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,260 psi | 61% | 2057 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,678 psi | 86% | 3104 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,040 psi | 87% | 3219 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 51,721 psi | 85% | 3163 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,679 psi | 88% | 3251 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,992 psi | 76% | 3176 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 84% | 52,721 psi | 87% | 3104 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,331 psi | 89% | 3153 fps | 97% |
| Rottweil R 905 | <<locked>> | 96% | 55,071 psi | 90% | 3222 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 86% | 51,851 psi | 85% | 3087 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,606 psi | 88% | 3114 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 53,969 psi | 89% | 3097 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 51,677 psi | 85% | 3104 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,099 psi | 89% | 3163 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,345 psi | 88% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,345 psi | 88% | 3064 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,592 psi | 90% | 3215 fps | 98.3% |
| Somchem S355 | <<locked>> | 84% | 52,591 psi | 86% | 3097 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,634 psi | 86% | 3084 fps | 95.9% |
| Somchem S365 | <<locked>> | 92% | 53,722 psi | 88% | 3192 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,170 psi | 86% | 3133 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 86% | 53,824 psi | 88% | 3071 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,446 psi | 86% | 3120 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,056 psi | 90% | 3166 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,708 psi | 90% | 3074 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 51,735 psi | 85% | 3123 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 52,982 psi | 87% | 3196 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,011 psi | 87% | 3248 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,098 psi | 86% | 3081 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,070 psi | 89% | 3202 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,821 psi | 82% | 3294 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,069 psi | 85% | 3123 fps | 97.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 51,126 psi | 84% | 3035 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 35,549 psi | 58% | 2779 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 51,068 psi | 84% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,146 psi | 64% | 2890 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,747 psi | 78% | 3005 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 43,279 psi | 71% | 2995 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 47,195 psi | 77% | 3104 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,544 psi | 80% | 3035 fps | 100% |
| Alliant Reloder-16 | 56.4 gr | 80% | 37,884 psi | 62% | 2900 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,352 psi | 71% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,931 psi | 70% | 2986 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,395 psi | 71% | 3041 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,963 psi | 46% | 2631 fps | 96.4% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,823 psi | 56% | 2822 fps | 95.8% |
| Alliant Reloder-26 | 63.8 gr | 82% | 32,169 psi | 53% | 2815 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 42,801 psi | 70% | 3025 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 49,168 psi | 81% | 3048 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,395 psi | 71% | 3041 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 43,047 psi | 71% | 2910 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,327 psi | 81% | 3061 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 41,002 psi | 67% | 2940 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 43,990 psi | 72% | 2966 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 50,430 psi | 83% | 3110 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,530 psi | 81% | 3094 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,433 psi | 58% | 2782 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,176 psi | 66% | 3038 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,074 psi | 66% | 2949 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,253 psi | 45% | 1795 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,227 psi | 82% | 3045 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,537 psi | 63% | 2825 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,266 psi | 73% | 2936 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 37,492 psi | 62% | 2835 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,124 psi | 81% | 3048 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 48,196 psi | 79% | 3140 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 50,720 psi | 83% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,945 psi | 69% | 2887 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 40,147 psi | 66% | 2864 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 34,389 psi | 56% | 2749 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 51,082 psi | 84% | 3094 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,700 psi | 72% | 2982 fps | 95.4% |
| Norma MRP | 65 gr | 86% | 37,202 psi | 61% | 2923 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 38,841 psi | 64% | 2884 fps | 98.4% |
| Ramshot Grand | <<locked>> | 96% | 48,225 psi | 79% | 3150 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 37,666 psi | 62% | 2867 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 40,001 psi | 66% | 2943 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 46% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,327 psi | 81% | 3041 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,035 psi | 76% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,001 psi | 64% | 2907 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,724 psi | 62% | 2913 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,086 psi | 61% | 2946 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 46,166 psi | 76% | 2989 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,674 psi | 78% | 3031 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 41,989 psi | 69% | 2966 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 43,047 psi | 71% | 2910 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,945 psi | 69% | 2887 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 50,720 psi | 83% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,147 psi | 66% | 2864 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,311 psi | 78% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,181 psi | 77% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,089 psi | 67% | 2825 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,640 psi | 68% | 2959 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 46,412 psi | 76% | 2989 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,081 psi | 81% | 3018 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,317 psi | 58% | 2835 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,929 psi | 66% | 2884 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 44,280 psi | 73% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,190 psi | 66% | 2881 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 39,494 psi | 65% | 2864 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 51,271 psi | 84% | 3022 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,769 psi | 65% | 2884 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 30,937 psi | 51% | 2713 fps | 96.5% |
| Vihtavuori N560 | <<locked>> | 94% | 49,516 psi | 81% | 3179 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,349 psi | 65% | 2844 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 41,176 psi | 68% | 2943 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,397 psi | 43% | 2664 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,293 psi | 69% | 2933 fps | 95.2% |
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 87 powders for 7 mm Blaser Mag. loaded with the .284 | 130gr | Speer Boat-Tail. Alliant Reloder-26 delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,310 fps. ADI AR 2217 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.284" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for 7 mm Blaser Mag. with the .284 | 130gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.