Load Specifications
Bullet Manufacturer:TWENTY-NINE
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:1:8.5
Load data in caliber 7 mm Backcountry with .284 | 155gr | TWENTY-NINE ERTP bullet and 125 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Alliant Reloder-17 and ReloadSwiss RS 60.
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>> | 88% | 71,518 psi | 89% | 2749 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 70,604 psi | 88% | 2792 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 72,011 psi | 90% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 69,488 psi | 87% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 69,792 psi | 87% | 2822 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,488 psi | 63% | 2631 fps | 98.1% |
| Accurate 4064 | <<locked>> | 94% | 72,040 psi | 90% | 2835 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 69,589 psi | 87% | 2904 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 71,808 psi | 90% | 2726 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 67,907 psi | 85% | 2713 fps | 100% |
| ADI APS 450 | <<locked>> | 92% | 70,692 psi | 88% | 2201 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 70,706 psi | 88% | 2871 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 71,895 psi | 90% | 2871 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,740 psi | 72% | 2776 fps | 97.1% |
| ADI AR 2219 | <<locked>> | 82% | 71,837 psi | 90% | 2815 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 69,270 psi | 87% | 2818 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 71,881 psi | 90% | 2779 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 68,269 psi | 85% | 2881 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 68,516 psi | 86% | 2963 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,638 psi | 72% | 2772 fps | 97.1% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,638 psi | 72% | 2772 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 68,414 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 70,053 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 69,241 psi | 87% | 2871 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 65,050 psi | 81% | 2897 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 67,762 psi | 85% | 2933 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,768 psi | 71% | 2759 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,326 psi | 59% | 2648 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,510 psi | 52% | 2559 fps | 96.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,114 psi | 68% | 2828 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 71,808 psi | 90% | 2726 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 71,895 psi | 90% | 2900 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 70,474 psi | 88% | 2864 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 69,082 psi | 86% | 2851 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 70,285 psi | 88% | 2789 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 70,227 psi | 88% | 2854 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 68,748 psi | 86% | 2913 fps | 100% |
| Hodgdon H322 | <<locked>> | 84% | 70,285 psi | 88% | 2799 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 72,113 psi | 90% | 2831 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 71,054 psi | 89% | 2887 fps | 100% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 71,808 psi | 90% | 2956 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 98% | 71,301 psi | 89% | 2917 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 90% | 71,518 psi | 89% | 2877 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 61,337 psi | 77% | 2772 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 68,110 psi | 85% | 2867 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 69,212 psi | 87% | 2956 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,303 psi | 45% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 68,806 psi | 86% | 2831 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 68,516 psi | 86% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 71,228 psi | 89% | 2854 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 70,837 psi | 89% | 2851 fps | 99.7% |
| IMR 4198 | <<locked>> | 84% | 68,792 psi | 86% | 2694 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 65,833 psi | 82% | 2828 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 98% | 70,982 psi | 89% | 2877 fps | 99.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 64,701 psi | 81% | 2831 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 71,127 psi | 89% | 2900 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 69,270 psi | 87% | 2818 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 70,750 psi | 89% | 2808 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 72,287 psi | 90% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 68,879 psi | 86% | 2792 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 71,562 psi | 90% | 2844 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 70,532 psi | 88% | 2864 fps | 100% |
| Lovex S070ᴾ | <<locked>> | 100% | 68,385 psi | 86% | 2861 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,105 psi | 53% | 2484 fps | 96.2% |
| Norma 201 | <<locked>> | 90% | 69,096 psi | 86% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 90% | 70,097 psi | 88% | 2808 fps | 100% |
| Norma 203B | <<locked>> | 92% | 68,371 psi | 86% | 2858 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 67,892 psi | 85% | 2890 fps | 98.5% |
| Norma MRPᴾ | <<locked>> | 100% | 53,272 psi | 67% | 2779 fps | 97.8% |
| Norma URPᴾ | <<locked>> | 100% | 67,109 psi | 84% | 2881 fps | 100% |
| Ramshot Big Game | <<locked>> | 92% | 70,082 psi | 88% | 2887 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 65,905 psi | 82% | 2884 fps | 99.8% |
| Ramshot TAC | <<locked>> | 88% | 69,836 psi | 87% | 2854 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 88% | 70,445 psi | 88% | 2867 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 70,474 psi | 88% | 2828 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 46% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 68,458 psi | 86% | 2792 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 70,822 psi | 89% | 2874 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 71,562 psi | 90% | 2946 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 72,026 psi | 90% | 2976 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 69,401 psi | 87% | 2930 fps | 100% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 68,052 psi | 85% | 2963 fps | 100% |
| Rottweil R 901 | <<locked>> | 88% | 69,444 psi | 87% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 69,763 psi | 87% | 2808 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 70,300 psi | 88% | 2858 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 59,596 psi | 75% | 2749 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,115 psi | 70% | 2749 fps | 97% |
| Rottweil R 907 | <<locked>> | 98% | 69,082 psi | 86% | 2851 fps | 99.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 70,532 psi | 88% | 2864 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 90% | 72,287 psi | 90% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 71,562 psi | 90% | 2844 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 68,385 psi | 86% | 2861 fps | 99.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 68,226 psi | 85% | 2776 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 71,054 psi | 89% | 2470 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 71,982 psi | 90% | 2828 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 67,907 psi | 85% | 2871 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 71,533 psi | 90% | 2772 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 69,328 psi | 87% | 2841 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 69,140 psi | 87% | 2844 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 70,111 psi | 88% | 2740 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 71,069 psi | 89% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 71,678 psi | 90% | 2831 fps | 99.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,608 psi | 70% | 2743 fps | 96.9% |
| Somchem S321 | <<locked>> | 86% | 71,794 psi | 90% | 2854 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 69,357 psi | 87% | 2733 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 68,487 psi | 86% | 2822 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 69,647 psi | 87% | 2848 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 62,076 psi | 78% | 2831 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,565 psi | 71% | 2726 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 86% | 69,067 psi | 86% | 2690 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 70,314 psi | 88% | 2717 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 70,169 psi | 88% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 70,721 psi | 88% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 71,721 psi | 90% | 2825 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 69,908 psi | 87% | 2877 fps | 100% |
| Vihtavuori N530 | <<locked>> | 88% | 70,343 psi | 88% | 2818 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 68,516 psi | 86% | 2782 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 68,763 psi | 86% | 2884 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,200 psi | 67% | 2726 fps | 99.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 70,590 psi | 88% | 2851 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 71,402 psi | 89% | 2867 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 72,214 psi | 90% | 2959 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,772 psi | 54% | 2684 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 70,111 psi | 88% | 2858 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,142 psi | 66% | 2667 fps | 96.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 55,941 psi | 70% | 2572 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 62,047 psi | 78% | 2694 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 49,037 psi | 61% | 2507 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 57,029 psi | 71% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,326 psi | 59% | 2500 fps | 95.8% |
| Accurate 3100 | <<locked>> | 92% | 38,551 psi | 48% | 2415 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,456 psi | 58% | 2507 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,983 psi | 44% | 2352 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 63,469 psi | 79% | 2638 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 64,020 psi | 80% | 2671 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 58,233 psi | 73% | 2047 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 51,851 psi | 65% | 2618 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 44,179 psi | 55% | 2477 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 50,676 psi | 63% | 2664 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 67,646 psi | 85% | 2769 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,911 psi | 67% | 2621 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 55,622 psi | 70% | 2595 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 63,875 psi | 80% | 2825 fps | 100% |
| Alliant Power Pro 2000-MR | 49.3 gr | 80% | 48,428 psi | 61% | 2671 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 50,676 psi | 63% | 2661 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 50,676 psi | 63% | 2661 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,483 psi | 56% | 2500 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 62,163 psi | 78% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,384 psi | 59% | 2562 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,505 psi | 43% | 2362 fps | 95.7% |
| Alliant Reloder-17 | 48.5 gr | 80% | 38,885 psi | 49% | 2484 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,995 psi | 63% | 2651 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,414 psi | 38% | 2277 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,899 psi | 49% | 2497 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 35,201 psi | 44% | 2451 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 63,657 psi | 80% | 2641 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,721 psi | 65% | 2635 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 44,483 psi | 56% | 2507 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 44,889 psi | 56% | 2487 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 55,230 psi | 69% | 2602 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,940 psi | 67% | 2651 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 59,959 psi | 75% | 2802 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 61,902 psi | 77% | 2703 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 63,164 psi | 79% | 2730 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,933 psi | 56% | 2510 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 42,366 psi | 53% | 2510 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 48,805 psi | 61% | 2592 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 52,402 psi | 66% | 2628 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,981 psi | 40% | 2267 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,008 psi | 61% | 2608 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,599 psi | 56% | 2582 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 34% | 1483 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,241 psi | 63% | 2582 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 53,084 psi | 66% | 2618 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,456 psi | 58% | 2513 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,733 psi | 61% | 2536 fps | 97% |
| IMR 4198 | <<locked>> | 80% | 61,656 psi | 77% | 2612 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 45,368 psi | 57% | 2516 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 43,453 psi | 54% | 2461 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 33,794 psi | 42% | 2310 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 48,602 psi | 61% | 2589 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 53,911 psi | 67% | 2621 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 61,844 psi | 77% | 2707 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,214 psi | 65% | 2605 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,155 psi | 64% | 2556 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 46,644 psi | 58% | 2513 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 38,363 psi | 48% | 2362 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 41,510 psi | 52% | 2441 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 39,421 psi | 49% | 2431 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,749 psi | 64% | 2569 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,416 psi | 64% | 2572 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,775 psi | 59% | 2549 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 51,677 psi | 65% | 2657 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 43,366 psi | 54% | 2598 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 35,012 psi | 44% | 2349 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 47,050 psi | 59% | 2572 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 41,408 psi | 52% | 2500 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 54,114 psi | 68% | 2641 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,056 psi | 68% | 2657 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 58,175 psi | 73% | 2674 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 34% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 60,176 psi | 75% | 2694 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,150 psi | 56% | 2497 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,256 psi | 64% | 2674 fps | 99.7% |
| ReloadSwiss RS 60 | 48.5 gr | 80% | 41,321 psi | 52% | 2543 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,838 psi | 44% | 2369 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 36,492 psi | 46% | 2425 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 54,868 psi | 69% | 2598 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,501 psi | 61% | 2526 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,887 psi | 52% | 2454 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 55,695 psi | 70% | 2694 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 96% | 49,110 psi | 61% | 2638 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 44,889 psi | 56% | 2487 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,363 psi | 48% | 2362 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,214 psi | 65% | 2605 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,644 psi | 58% | 2513 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 41,510 psi | 52% | 2441 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 63,875 psi | 80% | 2726 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 64,368 psi | 81% | 2402 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 67,588 psi | 85% | 2782 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,120 psi | 54% | 2507 fps | 99% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 63,324 psi | 79% | 2684 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,765 psi | 66% | 2621 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,546 psi | 63% | 2595 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,648 psi | 65% | 2516 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,526 psi | 54% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 42,902 psi | 54% | 2418 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 48,660 psi | 61% | 2635 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 59,030 psi | 74% | 2700 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 51,358 psi | 64% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,591 psi | 66% | 2615 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 42,351 psi | 53% | 2454 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 31,589 psi | 40% | 2310 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 46,528 psi | 58% | 2566 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 57,870 psi | 72% | 2562 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 52,170 psi | 65% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,472 psi | 61% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,660 psi | 61% | 2510 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,393 psi | 51% | 2392 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 36,361 psi | 45% | 2356 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 80% | 54,244 psi | 68% | 2618 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,920 psi | 59% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,853 psi | 45% | 2352 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 33,475 psi | 42% | 2352 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,810 psi | 45% | 2333 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 54,926 psi | 69% | 2667 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 42,598 psi | 53% | 2513 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,703 psi | 36% | 2300 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,444 psi | 63% | 2602 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,501 psi | 62% | 2608 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 125 powders for 7 mm Backcountry loaded with the .284 | 155gr | TWENTY-NINE ERTP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,976 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,976 fps. Accurate 3100 gives the best case fill at 100 %, and 125 of the 125 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 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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. Alliant Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 7 mm Backcountry with the .284 | 155gr | TWENTY-NINE ERTP 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.