Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 146gr | Peregrine VRG-2 bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Accurate MAGPRO.
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% | 55,956 psi | 88% | 2999 fps | 99.8% |
| Accurate 3100 | <<locked>> | 94% | 55,651 psi | 87% | 3061 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,637 psi | 89% | 3091 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,187 psi | 86% | 3163 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 57,696 psi | 90% | 3051 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 54,143 psi | 85% | 3100 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 55,825 psi | 87% | 3166 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,879 psi | 78% | 3051 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,440 psi | 70% | 3005 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,346 psi | 85% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,361 psi | 87% | 3114 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,435 psi | 90% | 3146 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,796 psi | 87% | 3159 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,956 psi | 89% | 3123 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,550 psi | 89% | 3192 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,653 psi | 90% | 3222 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,348 psi | 90% | 3120 fps | 96.8% |
| Bofors RP15 | <<locked>> | 96% | 54,708 psi | 86% | 3140 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 3127 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 55,796 psi | 87% | 3159 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 55,361 psi | 87% | 3038 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,285 psi | 80% | 3081 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 55,825 psi | 87% | 3110 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 56,188 psi | 88% | 3091 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 96% | 54,998 psi | 86% | 3087 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,520 psi | 85% | 3081 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,563 psi | 86% | 3018 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,288 psi | 87% | 3268 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,550 psi | 87% | 3133 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 58% | 1952 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,623 psi | 89% | 3025 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,969 psi | 86% | 3012 fps | 99.9% |
| IMR 4350 | <<locked>> | 88% | 57,174 psi | 90% | 3081 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,072 psi | 89% | 3068 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 54,911 psi | 86% | 3051 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,579 psi | 89% | 3081 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 92% | 53,635 psi | 84% | 3140 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 57,609 psi | 90% | 3061 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,709 psi | 87% | 3058 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3074 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,752 psi | 86% | 3084 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,972 psi | 63% | 2920 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 55,535 psi | 87% | 3176 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,245 psi | 87% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 53,403 psi | 84% | 3143 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 86% | 54,317 psi | 85% | 3084 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,766 psi | 86% | 3120 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,029 psi | 89% | 3120 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,593 psi | 87% | 3153 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 3264 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 3136 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 56,739 psi | 89% | 3038 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,303 psi | 87% | 3068 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 56,782 psi | 89% | 3133 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,361 psi | 87% | 3038 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,609 psi | 90% | 3061 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,709 psi | 87% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,623 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,869 psi | 89% | 3012 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,347 psi | 88% | 3127 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 56,391 psi | 88% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,855 psi | 89% | 3058 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 55,724 psi | 87% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,363 psi | 90% | 3104 fps | 99.9% |
| Unknown powder | <<locked>> | 84% | 55,521 psi | 87% | 3081 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 57,609 psi | 90% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,985 psi | 89% | 3068 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,898 psi | 89% | 3081 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 56,173 psi | 88% | 3074 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,405 psi | 87% | 3097 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,332 psi | 87% | 3173 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 55,201 psi | 87% | 3150 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 3143 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,768 psi | 89% | 3022 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,825 psi | 87% | 3110 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,056 psi | 86% | 3209 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,114 psi | 86% | 3064 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 2700 | <<locked>> | 80% | 52,460 psi | 82% | 2943 fps | 99.5% |
| Accurate 3100 | <<locked>> | 80% | 34,084 psi | 53% | 2638 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 46,006 psi | 72% | 2913 fps | 100% |
| Accurate MAGPRO | 75.5 gr | 90% | 47,877 psi | 75% | 3028 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 54,259 psi | 85% | 2999 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,522 psi | 60% | 2782 fps | 96% |
| ADI AR 2213 | <<locked>> | 86% | 42,235 psi | 66% | 2900 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 94% | 40,524 psi | 64% | 2854 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 90% | 31,807 psi | 50% | 2674 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,396 psi | 70% | 2927 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,430 psi | 81% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,479 psi | 60% | 2776 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,767 psi | 58% | 2772 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,837 psi | 51% | 2667 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,601 psi | 45% | 2566 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,100 psi | 57% | 2815 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,618 psi | 79% | 2995 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 36,448 psi | 57% | 2762 fps | 95.3% |
| Bofors RP30 | <<locked>> | 92% | 39,479 psi | 62% | 2864 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 36,767 psi | 58% | 2772 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 48,675 psi | 76% | 2923 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 92% | 38,986 psi | 61% | 2818 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 51,996 psi | 81% | 3045 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 46,253 psi | 72% | 2907 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 42,250 psi | 66% | 2844 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,309 psi | 69% | 2887 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,771 psi | 65% | 2802 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,579 psi | 57% | 2851 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 47,747 psi | 75% | 2999 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1745 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,200 psi | 83% | 2972 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,692 psi | 81% | 2953 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 44,338 psi | 69% | 2851 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,328 psi | 79% | 2953 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 39,653 psi | 62% | 2772 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,915 psi | 64% | 2779 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 40,451 psi | 63% | 2871 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 47,558 psi | 75% | 2894 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,919 psi | 72% | 2884 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,211 psi | 46% | 2503 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 44,440 psi | 70% | 2890 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 32,401 psi | 51% | 2720 fps | 95% |
| Norma MRP | 65.9 gr | 80% | 35,940 psi | 56% | 2779 fps | 96.8% |
| Norma URP | <<locked>> | 80% | 45,223 psi | 71% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 39,160 psi | 61% | 2851 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,237 psi | 69% | 2900 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 82% | 34,084 psi | 53% | 2700 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 1788 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,093 psi | 72% | 2936 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,440 psi | 70% | 2956 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,315 psi | 52% | 2756 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,685 psi | 68% | 2992 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 53,026 psi | 83% | 2982 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,784 psi | 62% | 2759 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 37,695 psi | 59% | 2759 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 48,675 psi | 76% | 2923 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,558 psi | 75% | 2894 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,919 psi | 72% | 2884 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,156 psi | 83% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,543 psi | 73% | 2838 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,376 psi | 59% | 2749 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,794 psi | 83% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,381 psi | 68% | 2812 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 42,337 psi | 66% | 2858 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,276 psi | 60% | 2743 fps | 97.1% |
| Unknown powder | <<locked>> | 80% | 48,515 psi | 76% | 2963 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 50,604 psi | 79% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,702 psi | 73% | 2900 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,476 psi | 56% | 2667 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 46,079 psi | 72% | 2900 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,927 psi | 58% | 2753 fps | 99.5% |
| Vihtavuori N560 | 69.1 gr | 84% | 41,597 psi | 65% | 2900 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 90% | 41,698 psi | 65% | 2887 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 44,904 psi | 70% | 3005 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,948 psi | 72% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,996 psi | 81% | 3045 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,196 psi | 46% | 2680 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,116 psi | 60% | 2736 fps | 96% |
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 78 powders for 7 x 66 SE v. Hofe loaded with the .284 | 146gr | Peregrine VRG-2. Hodgdon Retumbo delivers the highest muzzle velocity at 3,268 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,268 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 146.0 gr projectile in 0.284" calls for a 1:12.5 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. Vihtavuori N560, Norma MRP, Accurate MAGPRO rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 146gr | Peregrine VRG-2 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.