Load Specifications
Bullet:.284 | 155gr | Hammer Hunter
Bullet Manufacturer:Hammer
Bullet Weight:155 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:7 mm Backcountry load data
Case Length (l3):2.417"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:73 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:20"
Max. allowed Pressure:79,916 psi
Recommended Twist Rate:1:9.5
Load data in caliber 7 mm Backcountry with .284 | 155gr | Hammer Hunter bullet and 127 powders. The key underlying parameters are shown in the table above.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 69,082 psi | 86% | 2733 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 68,124 psi | 85% | 2772 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 70,082 psi | 88% | 2772 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 72,098 psi | 90% | 2844 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 72,185 psi | 90% | 2864 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,055 psi | 66% | 2677 fps | 98.7% |
| Accurate 4064 | <<locked>> | 92% | 70,155 psi | 88% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 67,921 psi | 85% | 2894 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 58,015 psi | 73% | 2861 fps | 96.5% |
| Accurate LT-30 | <<locked>> | 82% | 69,343 psi | 87% | 2713 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 69,952 psi | 88% | 2746 fps | 100% |
| ADI APS 450 | <<locked>> | 92% | 71,040 psi | 89% | 2221 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 68,850 psi | 86% | 2858 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 69,720 psi | 87% | 2858 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 59,944 psi | 75% | 2818 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 71,359 psi | 89% | 2851 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 69,850 psi | 87% | 2766 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 70,648 psi | 88% | 2917 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 71,518 psi | 89% | 3002 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 71,170 psi | 89% | 2881 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 72,011 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 71,649 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 67,747 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 70,822 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 59,248 psi | 74% | 2805 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,605 psi | 66% | 2746 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,821 psi | 62% | 2694 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,236 psi | 54% | 2602 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,377 psi | 72% | 2881 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 69,444 psi | 87% | 2710 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 69,676 psi | 87% | 2884 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 68,734 psi | 86% | 2854 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,605 psi | 66% | 2746 fps | 96.5% |
| Bofors RP7 | <<locked>> | 98% | 71,504 psi | 89% | 2890 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 68,153 psi | 85% | 2776 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 67,834 psi | 85% | 2835 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 71,373 psi | 89% | 2953 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 67,921 psi | 85% | 2782 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 69,459 psi | 87% | 2812 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 69,154 psi | 87% | 2874 fps | 100% |
| Hodgdon H414 | <<locked>> | 98% | 69,966 psi | 88% | 2943 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 96% | 69,241 psi | 87% | 2900 fps | 99.1% |
| Hodgdon H4895 | <<locked>> | 88% | 69,633 psi | 87% | 2867 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 63,947 psi | 80% | 2812 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 70,880 psi | 89% | 2907 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 67,153 psi | 84% | 2936 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 45% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 70,837 psi | 89% | 2864 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 70,706 psi | 88% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 69,502 psi | 87% | 2844 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 68,617 psi | 86% | 2838 fps | 99.7% |
| IMR 4198 | <<locked>> | 84% | 70,822 psi | 89% | 2723 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 68,066 psi | 85% | 2867 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 96% | 68,951 psi | 86% | 2864 fps | 99.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 67,530 psi | 85% | 2877 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 69,154 psi | 87% | 2884 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 59,176 psi | 74% | 2749 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 88% | 71,359 psi | 89% | 2851 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 68,530 psi | 86% | 2792 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 70,285 psi | 88% | 2835 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 70,866 psi | 89% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 69,589 psi | 87% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 68,922 psi | 86% | 2858 fps | 100% |
| Lovex S070ᴾ | <<locked>> | 100% | 70,692 psi | 88% | 2900 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,034 psi | 55% | 2526 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 71,272 psi | 89% | 2848 fps | 100% |
| Norma 202 | <<locked>> | 90% | 72,258 psi | 90% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 92% | 70,764 psi | 89% | 2894 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 70,474 psi | 88% | 2933 fps | 98.9% |
| Norma MRPᴾ | <<locked>> | 100% | 56,028 psi | 70% | 2831 fps | 98.5% |
| Norma URPᴾ | <<locked>> | 100% | 69,633 psi | 87% | 2920 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 68,269 psi | 85% | 2874 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 68,458 psi | 86% | 2927 fps | 99.9% |
| Ramshot TAC | <<locked>> | 88% | 72,229 psi | 90% | 2890 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 86% | 68,052 psi | 85% | 2848 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 68,095 psi | 85% | 2812 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 46% | 1716 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 70,706 psi | 88% | 2825 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 68,821 psi | 86% | 2861 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 69,589 psi | 87% | 2933 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 70,126 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 72,200 psi | 90% | 2969 fps | 100% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 71,069 psi | 89% | 3005 fps | 100% |
| Rottweil R 901 | <<locked>> | 88% | 71,446 psi | 89% | 2812 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 71,852 psi | 90% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 68,574 psi | 86% | 2848 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 61,743 psi | 77% | 2792 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 58,392 psi | 73% | 2792 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 98% | 71,504 psi | 89% | 2890 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 68,922 psi | 86% | 2858 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 88% | 70,285 psi | 88% | 2835 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 69,589 psi | 87% | 2831 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 70,692 psi | 88% | 2900 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 70,343 psi | 88% | 2808 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 69,154 psi | 87% | 2464 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 70,445 psi | 88% | 2907 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 69,314 psi | 87% | 2759 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 71,533 psi | 90% | 2877 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 71,359 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 71,968 psi | 90% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 68,879 psi | 86% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 69,618 psi | 87% | 2822 fps | 99.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,885 psi | 72% | 2789 fps | 97.6% |
| Somchem S321 | <<locked>> | 84% | 69,401 psi | 87% | 2838 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 71,359 psi | 89% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 71,011 psi | 89% | 2858 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 71,939 psi | 90% | 2884 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 64,266 psi | 80% | 2792 fps | 96.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 64,788 psi | 81% | 2867 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 59,045 psi | 74% | 2769 fps | 98.4% |
| Vihtavuori N130 | <<locked>> | 86% | 71,127 psi | 89% | 2720 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 72,185 psi | 90% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 68,052 psi | 85% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 68,719 psi | 86% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 69,676 psi | 87% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 68,226 psi | 85% | 2867 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,169 psi | 64% | 2638 fps | 96.6% |
| Vihtavuori N530 | <<locked>> | 86% | 67,979 psi | 85% | 2802 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 71,054 psi | 89% | 2815 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 71,475 psi | 89% | 2920 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,695 psi | 70% | 2769 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 68,429 psi | 86% | 2835 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 69,459 psi | 87% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 70,358 psi | 88% | 2949 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,831 psi | 56% | 2733 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 88% | 67,675 psi | 85% | 2838 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,448 psi | 69% | 2710 fps | 96.8% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 57,769 psi | 72% | 2602 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 63,991 psi | 80% | 2726 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 50,879 psi | 64% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 58,972 psi | 74% | 2694 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,834 psi | 61% | 2536 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 40,451 psi | 51% | 2457 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 48,167 psi | 60% | 2539 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,724 psi | 46% | 2395 fps | 96.5% |
| Accurate High Country | <<locked>> | 98% | 53,940 psi | 67% | 2799 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 65,180 psi | 82% | 2667 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 65,760 psi | 82% | 2700 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 58,320 psi | 73% | 2064 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 53,722 psi | 67% | 2654 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,672 psi | 57% | 2510 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 49,472 psi | 62% | 2651 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 55,782 psi | 70% | 2657 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 57,696 psi | 72% | 2631 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 66,224 psi | 83% | 2864 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,198 psi | 63% | 2710 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,050 psi | 58% | 2533 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 64,150 psi | 80% | 2687 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,211 psi | 62% | 2598 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,795 psi | 45% | 2398 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,480 psi | 51% | 2523 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,878 psi | 61% | 2641 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 49,226 psi | 62% | 2687 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 29,849 psi | 37% | 2267 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 38,261 psi | 48% | 2490 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 36,840 psi | 46% | 2493 fps | 96% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 65,195 psi | 82% | 2664 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,374 psi | 67% | 2667 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 46,311 psi | 58% | 2546 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 49,226 psi | 62% | 2687 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 43,555 psi | 55% | 2470 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 56,768 psi | 71% | 2635 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 55,680 psi | 70% | 2680 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 62,192 psi | 78% | 2841 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 63,701 psi | 80% | 2733 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 65,296 psi | 82% | 2762 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 46,644 psi | 58% | 2549 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 41,408 psi | 52% | 2493 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 47,282 psi | 59% | 2572 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 54,317 psi | 68% | 2664 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,359 psi | 42% | 2306 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,879 psi | 64% | 2644 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 43,453 psi | 54% | 2566 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,253 psi | 34% | 1496 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,808 psi | 65% | 2615 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 55,027 psi | 69% | 2651 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,051 psi | 60% | 2546 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,111 psi | 63% | 2569 fps | 97.5% |
| IMR 4198 | <<locked>> | 80% | 63,077 psi | 79% | 2638 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 44,179 psi | 55% | 2503 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,235 psi | 53% | 2444 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 35,404 psi | 44% | 2352 fps | 96.1% |
| IMR 4895 | <<locked>> | 80% | 50,502 psi | 63% | 2625 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,854 psi | 70% | 2697 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 55,782 psi | 70% | 2657 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 64,034 psi | 80% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 53,867 psi | 67% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,678 psi | 66% | 2589 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,269 psi | 60% | 2546 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,726 psi | 50% | 2398 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 40,422 psi | 51% | 2428 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 38,667 psi | 48% | 2421 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 52,373 psi | 66% | 2602 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,142 psi | 66% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,588 psi | 61% | 2585 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 50,183 psi | 63% | 2641 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 42,453 psi | 53% | 2585 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,622 psi | 46% | 2392 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 48,776 psi | 61% | 2608 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 40,422 psi | 51% | 2484 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 55,651 psi | 70% | 2674 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 56,014 psi | 70% | 2694 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 59,770 psi | 75% | 2707 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 35% | 1532 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 62,163 psi | 78% | 2726 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,717 psi | 58% | 2536 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,011 psi | 66% | 2710 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,018 psi | 54% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,448 psi | 46% | 2408 fps | 96% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 37,985 psi | 48% | 2467 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 56,681 psi | 71% | 2635 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 50,125 psi | 63% | 2559 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,714 psi | 55% | 2493 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 54,549 psi | 68% | 2687 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 94% | 47,819 psi | 60% | 2621 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 43,555 psi | 55% | 2470 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,726 psi | 50% | 2398 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,867 psi | 67% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,269 psi | 60% | 2546 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,422 psi | 51% | 2428 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 65,673 psi | 82% | 2756 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 65,775 psi | 82% | 2428 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,585 psi | 56% | 2539 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 65,369 psi | 82% | 2717 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 54,752 psi | 69% | 2661 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,996 psi | 65% | 2625 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,345 psi | 67% | 2546 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,078 psi | 56% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,582 psi | 52% | 2402 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,384 psi | 59% | 2615 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 60,785 psi | 76% | 2733 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 52,924 psi | 66% | 2543 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,259 psi | 68% | 2648 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,888 psi | 55% | 2490 fps | 99.5% |
| Somchem S361 | <<locked>> | 98% | 60,031 psi | 75% | 2736 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 32,967 psi | 41% | 2346 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 45,629 psi | 57% | 2556 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 59,669 psi | 75% | 2595 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 53,896 psi | 67% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,328 psi | 63% | 2533 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,531 psi | 63% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,076 psi | 53% | 2428 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,985 psi | 48% | 2395 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 96% | 44,875 psi | 56% | 2533 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 56,173 psi | 70% | 2654 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 48,602 psi | 61% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,362 psi | 47% | 2392 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 32,982 psi | 41% | 2343 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,043 psi | 46% | 2365 fps | 98.6% |
| Winchester 748 | <<locked>> | 80% | 56,869 psi | 71% | 2700 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 41,408 psi | 52% | 2493 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 30,037 psi | 38% | 2352 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,156 psi | 65% | 2635 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 48,370 psi | 61% | 2598 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 127 powders for 7 mm Backcountry loaded with the .284 | 155gr | Hammer Hunter. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,677 fps to 3,005 fps. Accurate 3100 gives the best case fill at 100 %, and 127 of the 127 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (551 MPa), the top charges use 45–90 %, 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. Accurate 3100, Accurate High Country, ADI AR 2209 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.