Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:140 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:1:10.0
Load data in caliber 7 mm Backcountry with .284 | 140gr | Barnes TTSX BT bullet and 119 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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>> | 90% | 72,084 psi | 90% | 2910 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 71,881 psi | 90% | 3048 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 71,692 psi | 90% | 2956 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 67,762 psi | 85% | 2894 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 70,590 psi | 88% | 2976 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 71,170 psi | 89% | 2982 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,731 psi | 58% | 2697 fps | 96.4% |
| Accurate 4064 | <<locked>> | 96% | 72,156 psi | 90% | 2995 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 65,180 psi | 82% | 3002 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 84% | 69,024 psi | 86% | 2851 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 69,647 psi | 87% | 2887 fps | 100% |
| ADI APS 450 | <<locked>> | 92% | 70,822 psi | 89% | 2329 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 71,823 psi | 90% | 3038 fps | 100% |
| ADI AR 2207 | <<locked>> | 82% | 71,547 psi | 90% | 2851 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 68,588 psi | 86% | 2986 fps | 100% |
| ADI AR 2219 | <<locked>> | 82% | 68,850 psi | 86% | 2940 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 70,300 psi | 88% | 2982 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 68,414 psi | 86% | 2900 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 69,299 psi | 87% | 3051 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 69,618 psi | 87% | 3130 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 69,488 psi | 87% | 3005 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 70,880 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 70,039 psi | 88% | 3035 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 61,351 psi | 77% | 2995 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 98% | 68,530 psi | 86% | 3094 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,208 psi | 55% | 2723 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,270 psi | 63% | 2897 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 69,169 psi | 87% | 2848 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 68,400 psi | 86% | 3009 fps | 100% |
| Bofors RP3 | <<locked>> | 96% | 71,112 psi | 89% | 3028 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 69,995 psi | 88% | 3005 fps | 98.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 71,620 psi | 90% | 2959 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 71,156 psi | 89% | 3018 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 70,198 psi | 88% | 3087 fps | 100% |
| Hodgdon H322 | <<locked>> | 86% | 71,504 psi | 89% | 2969 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 68,617 psi | 86% | 2946 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 72,243 psi | 90% | 3054 fps | 100% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 68,052 psi | 85% | 3054 fps | 99.2% |
| Hodgdon H4198 | <<locked>> | 82% | 71,243 psi | 89% | 2904 fps | 100% |
| Hodgdon H4350 | <<locked>> | 98% | 67,936 psi | 85% | 3018 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 90% | 68,284 psi | 85% | 2995 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,957 psi | 73% | 2874 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 69,314 psi | 87% | 3035 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 70,604 psi | 88% | 3117 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,766 psi | 45% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 69,749 psi | 87% | 2995 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 69,212 psi | 87% | 2969 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 67,979 psi | 85% | 2966 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 67,675 psi | 85% | 2959 fps | 99.1% |
| IMR 4198 | <<locked>> | 86% | 70,082 psi | 88% | 2864 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 62,584 psi | 78% | 2927 fps | 98.1% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 72,084 psi | 90% | 3035 fps | 99.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 60,930 psi | 76% | 2930 fps | 99.8% |
| IMR 4895 | <<locked>> | 94% | 71,881 psi | 90% | 3061 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 70,300 psi | 88% | 2982 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 71,982 psi | 90% | 2976 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 68,284 psi | 85% | 2956 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 70,140 psi | 88% | 2956 fps | 100% |
| Lovex S062 | <<locked>> | 96% | 72,055 psi | 90% | 3005 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 67,225 psi | 84% | 2972 fps | 99.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 64,846 psi | 81% | 2959 fps | 98.9% |
| Norma 200 | <<locked>> | 82% | 70,590 psi | 88% | 2881 fps | 100% |
| Norma 201 | <<locked>> | 92% | 69,894 psi | 87% | 2976 fps | 100% |
| Norma 202 | <<locked>> | 92% | 70,924 psi | 89% | 2969 fps | 100% |
| Norma 203B | <<locked>> | 94% | 69,111 psi | 86% | 3018 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 64,310 psi | 80% | 2982 fps | 97.2% |
| Norma URPᴾ | <<locked>> | 100% | 63,425 psi | 79% | 2982 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 94% | 71,359 psi | 89% | 3054 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 62,236 psi | 78% | 2979 fps | 99.1% |
| Ramshot TAC | <<locked>> | 90% | 71,315 psi | 89% | 3018 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 90% | 71,518 psi | 89% | 3035 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 88% | 71,866 psi | 90% | 2992 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,303 psi | 45% | 1798 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 69,749 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 71,982 psi | 90% | 3035 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 67,907 psi | 85% | 3061 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 67,820 psi | 85% | 3087 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 65,151 psi | 82% | 3025 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 64,353 psi | 81% | 3061 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 90% | 70,111 psi | 88% | 2946 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 70,474 psi | 88% | 2972 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 70,924 psi | 89% | 3018 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 69,995 psi | 88% | 3005 fps | 98.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 67,225 psi | 84% | 2972 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 68,284 psi | 85% | 2956 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 72,055 psi | 90% | 3005 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 64,846 psi | 81% | 2959 fps | 98.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 69,763 psi | 87% | 2943 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 69,212 psi | 87% | 2598 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 69,082 psi | 86% | 2953 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 68,821 psi | 86% | 3031 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 68,385 psi | 86% | 2897 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 70,256 psi | 88% | 3002 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 70,314 psi | 88% | 3009 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 71,359 psi | 89% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 72,098 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 68,443 psi | 86% | 2936 fps | 99.1% |
| Somchem S321 | <<locked>> | 86% | 68,284 psi | 85% | 2966 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 70,329 psi | 88% | 2897 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 69,763 psi | 87% | 2982 fps | 100% |
| Somchem S355 | <<locked>> | 98% | 70,155 psi | 88% | 3009 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 58,059 psi | 73% | 2930 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,287 psi | 67% | 2808 fps | 96.3% |
| Vihtavuori N120 | <<locked>> | 82% | 70,938 psi | 89% | 2795 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 70,256 psi | 88% | 2854 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 71,489 psi | 89% | 2881 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 70,648 psi | 88% | 2923 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 71,794 psi | 90% | 2949 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 68,342 psi | 86% | 2940 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 66,166 psi | 83% | 2979 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 90% | 71,721 psi | 90% | 2989 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 69,560 psi | 87% | 2943 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 64,861 psi | 81% | 2979 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,182 psi | 62% | 2799 fps | 99% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 66,906 psi | 84% | 2956 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 68,139 psi | 85% | 2986 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 68,429 psi | 86% | 3061 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,711 psi | 50% | 2733 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 92% | 71,069 psi | 89% | 3022 fps | 100% |
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% | 53,113 psi | 66% | 2680 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 67,370 psi | 84% | 2992 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 58,595 psi | 73% | 2802 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,469 psi | 57% | 2595 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,606 psi | 67% | 2759 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 51,039 psi | 64% | 2694 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 43,584 psi | 55% | 2638 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,047 psi | 54% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 37,101 psi | 46% | 2523 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 61,206 psi | 77% | 2759 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 61,714 psi | 77% | 2792 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 58,175 psi | 73% | 2165 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 49,240 psi | 62% | 2713 fps | 99.4% |
| ADI AR 2207 | <<locked>> | 80% | 67,544 psi | 85% | 2808 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,626 psi | 52% | 2556 fps | 97.5% |
| ADI AR 2219 | <<locked>> | 80% | 64,194 psi | 80% | 2884 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,416 psi | 64% | 2723 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 52,533 psi | 66% | 2707 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 60,800 psi | 76% | 2940 fps | 100% |
| Alliant Power Pro 2000-MR | 51.4 gr | 80% | 45,368 psi | 57% | 2746 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,742 psi | 52% | 2582 fps | 98.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 59,146 psi | 74% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,773 psi | 56% | 2648 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 36,637 psi | 46% | 2533 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,187 psi | 45% | 2543 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 92% | 34,127 psi | 43% | 2490 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 40,408 psi | 51% | 2694 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 60,872 psi | 76% | 2753 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,718 psi | 61% | 2720 fps | 98.6% |
| Bofors RP3 | <<locked>> | 80% | 41,539 psi | 52% | 2582 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 47,892 psi | 60% | 2671 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,678 psi | 66% | 2710 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,691 psi | 63% | 2743 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 56,565 psi | 71% | 2900 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 58,842 psi | 74% | 2818 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 60,249 psi | 75% | 2844 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,221 psi | 53% | 2589 fps | 96.5% |
| Hodgdon H414 | <<locked>> | 88% | 45,484 psi | 57% | 2697 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 67,240 psi | 84% | 2858 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 52,388 psi | 66% | 2782 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 49,763 psi | 62% | 2726 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 31,778 psi | 40% | 2379 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,021 psi | 58% | 2694 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 90% | 48,443 psi | 61% | 2779 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 33% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,587 psi | 60% | 2674 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 49,792 psi | 62% | 2717 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,743 psi | 55% | 2592 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,195 psi | 58% | 2618 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 59,030 psi | 74% | 2733 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 48,559 psi | 61% | 2700 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 46,804 psi | 59% | 2651 fps | 95.3% |
| IMR 4831 | <<locked>> | 86% | 38,218 psi | 48% | 2533 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 45,905 psi | 57% | 2677 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 51,416 psi | 64% | 2723 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 58,537 psi | 73% | 2812 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,718 psi | 61% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,530 psi | 61% | 2648 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 43,685 psi | 55% | 2595 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 40,901 psi | 51% | 2539 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 47,123 psi | 59% | 2677 fps | 95.8% |
| Norma 200 | <<locked>> | 80% | 66,268 psi | 83% | 2835 fps | 100% |
| Norma 201 | <<locked>> | 80% | 47,863 psi | 60% | 2661 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 48,631 psi | 61% | 2671 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,135 psi | 55% | 2635 fps | 98.6% |
| Norma 204 | <<locked>> | 96% | 55,927 psi | 70% | 2861 fps | 95.6% |
| Norma URP | <<locked>> | 84% | 37,173 psi | 47% | 2523 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 44,063 psi | 55% | 2648 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 44,469 psi | 56% | 2684 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 51,184 psi | 64% | 2730 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,256 psi | 64% | 2753 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 55,230 psi | 69% | 2772 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 34% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 57,435 psi | 72% | 2802 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,571 psi | 57% | 2635 fps | 95.8% |
| ReloadSwiss RS 52 | 49.8 gr | 80% | 47,805 psi | 60% | 2756 fps | 98.8% |
| ReloadSwiss RS 60 | 50.6 gr | 80% | 38,551 psi | 48% | 2615 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 39,769 psi | 50% | 2602 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 41,829 psi | 52% | 2667 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 51,706 psi | 65% | 2700 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,513 psi | 57% | 2612 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 38,943 psi | 49% | 2523 fps | 98% |
| Rottweil R 907 | <<locked>> | 88% | 47,892 psi | 60% | 2671 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,901 psi | 51% | 2539 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,718 psi | 61% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,685 psi | 55% | 2595 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 47,123 psi | 59% | 2677 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 60,771 psi | 76% | 2831 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 62,511 psi | 78% | 2526 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 64,629 psi | 81% | 2900 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,176 psi | 50% | 2575 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 60,379 psi | 76% | 2802 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,879 psi | 62% | 2707 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,572 psi | 60% | 2680 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,052 psi | 61% | 2615 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,075 psi | 51% | 2477 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,890 psi | 57% | 2595 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 55,782 psi | 70% | 2802 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 48,733 psi | 61% | 2615 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,545 psi | 62% | 2703 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 39,653 psi | 50% | 2530 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 29,022 psi | 36% | 2352 fps | 95.4% |
| Somchem S385 | <<locked>> | 98% | 49,835 psi | 62% | 2749 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 66,979 psi | 84% | 2753 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 55,172 psi | 69% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 49,559 psi | 62% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,455 psi | 57% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,934 psi | 57% | 2605 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,753 psi | 47% | 2467 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 38,870 psi | 49% | 2530 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 51,590 psi | 65% | 2720 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,353 psi | 55% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 38,261 psi | 48% | 2526 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 90% | 35,056 psi | 44% | 2510 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,359 psi | 42% | 2392 fps | 96.3% |
| Winchester 748 | <<locked>> | 80% | 51,837 psi | 65% | 2766 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,484 psi | 57% | 2697 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 94% | 32,401 psi | 41% | 2523 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,471 psi | 59% | 2687 fps | 99.5% |
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 119 powders for 7 mm Backcountry loaded with the .284 | 140gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,755 fps to 3,130 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 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 140.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 7 mm Backcountry with the .284 | 140gr | Barnes TTSX BT 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.