Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 145gr | Peregrine Glider GRM bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ADI AR 2213.
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 3100 | <<locked>> | 96% | 54,795 psi | 86% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,173 psi | 88% | 3084 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,391 psi | 88% | 3205 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 57,377 psi | 90% | 3205 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 54,360 psi | 85% | 2995 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,493 psi | 90% | 3146 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 55,042 psi | 86% | 3146 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,861 psi | 72% | 2963 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,611 psi | 64% | 2913 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,653 psi | 90% | 3143 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,463 psi | 87% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,450 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,781 psi | 86% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,898 psi | 89% | 3133 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,694 psi | 86% | 3140 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,883 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,459 psi | 81% | 3114 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,362 psi | 88% | 3209 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 57,406 psi | 90% | 3107 fps | 96.2% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3182 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 56,507 psi | 89% | 3038 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,311 psi | 74% | 3038 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 54,694 psi | 86% | 3140 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 55,593 psi | 87% | 3035 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 3061 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 82% | 56,536 psi | 89% | 3058 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,563 psi | 86% | 3087 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 57,638 psi | 90% | 3104 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 55,172 psi | 86% | 3084 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,911 psi | 84% | 3064 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,682 psi | 90% | 3061 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,386 psi | 79% | 3176 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 55,129 psi | 86% | 3127 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 57% | 1926 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,246 psi | 90% | 3031 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,261 psi | 90% | 3077 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,203 psi | 90% | 3061 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 56,797 psi | 89% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,362 psi | 88% | 3071 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 98% | 56,739 psi | 89% | 3189 fps | 98.8% |
| Lovex S062 | <<locked>> | 82% | 57,667 psi | 90% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,493 psi | 90% | 3054 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,521 psi | 87% | 3048 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 3002 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,549 psi | 85% | 3074 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 35,998 psi | 56% | 2828 fps | 96.2% |
| Norma MRP | <<locked>> | 94% | 54,578 psi | 86% | 3166 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 54,824 psi | 86% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,551 psi | 90% | 3209 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 57,580 psi | 90% | 3133 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3133 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,304 psi | 88% | 3045 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,331 psi | 85% | 3094 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,579 psi | 89% | 3114 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,911 psi | 86% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,068 psi | 80% | 3176 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 56,608 psi | 89% | 3035 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,998 psi | 86% | 3054 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 56,347 psi | 88% | 3123 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 55,593 psi | 87% | 3035 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,493 psi | 90% | 3054 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,667 psi | 90% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,521 psi | 87% | 3048 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,766 psi | 86% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,913 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,043 psi | 89% | 3009 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,898 psi | 88% | 3117 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 56,304 psi | 88% | 3028 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,652 psi | 89% | 3045 fps | 98% |
| Somchem S365 | <<locked>> | 90% | 55,143 psi | 86% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,608 psi | 89% | 3091 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 54,157 psi | 85% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,753 psi | 89% | 3061 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,173 psi | 88% | 3064 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 56,086 psi | 88% | 3068 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,259 psi | 85% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,534 psi | 85% | 3159 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,911 psi | 84% | 3127 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,594 psi | 89% | 3018 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,824 psi | 86% | 3091 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,130 psi | 90% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,000 psi | 89% | 3091 fps | 99.4% |
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 3100 | <<locked>> | 80% | 31,241 psi | 49% | 2566 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 42,467 psi | 67% | 2848 fps | 99.8% |
| Accurate High Country | <<locked>> | 86% | 42,308 psi | 66% | 2936 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 90% | 46,209 psi | 72% | 3002 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,140 psi | 80% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,334 psi | 60% | 2776 fps | 95.5% |
| ADI AR 2213 | 65.8 gr | 88% | 41,742 psi | 65% | 2884 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 42,989 psi | 67% | 2900 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 33,373 psi | 52% | 2720 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,580 psi | 60% | 2776 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,170 psi | 82% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,147 psi | 64% | 2861 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,384 psi | 74% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,189 psi | 60% | 2769 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,899 psi | 61% | 2828 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,153 psi | 47% | 2602 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,066 psi | 47% | 2615 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,866 psi | 52% | 2736 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,824 psi | 84% | 3041 fps | 95.3% |
| Bofors RP15 | <<locked>> | 88% | 38,377 psi | 60% | 2812 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,808 psi | 83% | 2982 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,234 psi | 65% | 2910 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 38,899 psi | 61% | 2828 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,803 psi | 72% | 2858 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 41,176 psi | 65% | 2864 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 52,924 psi | 83% | 3002 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,585 psi | 70% | 2904 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 47,340 psi | 74% | 2923 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 44,846 psi | 70% | 2894 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 43,830 psi | 69% | 2874 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,624 psi | 61% | 2740 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 35,955 psi | 56% | 2831 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 43,976 psi | 69% | 2923 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 43% | 1726 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,809 psi | 84% | 2979 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,437 psi | 65% | 2785 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,340 psi | 74% | 2890 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 40,611 psi | 64% | 2795 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,598 psi | 68% | 2831 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 42,888 psi | 67% | 2923 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 53,998 psi | 85% | 2969 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,672 psi | 70% | 2835 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 43,033 psi | 67% | 2818 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 30,632 psi | 48% | 2549 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 41,336 psi | 65% | 2822 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 33,562 psi | 53% | 2759 fps | 95.1% |
| Norma MRP | 61.8 gr | 80% | 32,822 psi | 51% | 2700 fps | 95% |
| Norma URP | <<locked>> | 80% | 42,090 psi | 66% | 2841 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 39,682 psi | 62% | 2861 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,046 psi | 64% | 2831 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 35,346 psi | 55% | 2730 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 44% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,765 psi | 83% | 2986 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,372 psi | 79% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,656 psi | 67% | 2871 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,031 psi | 64% | 2884 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,779 psi | 51% | 2733 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 49,676 psi | 78% | 2927 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,424 psi | 66% | 2815 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 37,304 psi | 58% | 2749 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 45,803 psi | 72% | 2858 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,672 psi | 70% | 2835 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 53,998 psi | 85% | 2969 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,033 psi | 67% | 2818 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,256 psi | 80% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,241 psi | 79% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,656 psi | 68% | 2776 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,970 psi | 58% | 2743 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 49,530 psi | 78% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,221 psi | 68% | 2802 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 38,798 psi | 61% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,447 psi | 56% | 2674 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 47,543 psi | 75% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,497 psi | 68% | 2835 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,070 psi | 55% | 2654 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 42,859 psi | 67% | 2838 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,852 psi | 53% | 2684 fps | 98.7% |
| Vihtavuori N560 | 68 gr | 88% | 44,164 psi | 69% | 2959 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 43,801 psi | 69% | 2936 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,583 psi | 67% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,585 psi | 70% | 2904 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,716 psi | 42% | 2595 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,202 psi | 58% | 2713 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 83 powders for 7 x 66 SE v. Hofe loaded with the .284 | 145gr | Peregrine Glider GRM. Winchester StaBALL HD delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,255 fps. ADI AR 2217 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.284" calls for a 1:8.5 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, Vihtavuori N560, ADI AR 2213 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 145gr | Peregrine Glider GRM 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.