Load Specifications
Bullet:.284 | 127gr | Geco ZERO LG
Bullet Manufacturer:Geco
Bullet Weight:127 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:7 mm PRC load data
Case Length (l3):2.28"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:82 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:9.0
Load data in caliber 7 mm PRC with .284 | 127gr | Geco ZERO LG bullet and 98 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 Reloder-16 and Hodgdon H414.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 56,521 psi | 87% | 3058 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,711 psi | 90% | 3136 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,402 psi | 81% | 3104 fps | 99% |
| Accurate 4064 | <<locked>> | 86% | 56,782 psi | 87% | 3114 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 58,175 psi | 89% | 3225 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 56,130 psi | 86% | 3146 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,508 psi | 88% | 3153 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,927 psi | 86% | 3212 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,407 psi | 90% | 3146 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,276 psi | 88% | 3287 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,738 psi | 86% | 3202 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 58,218 psi | 90% | 3176 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 58,494 psi | 90% | 3202 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,332 psi | 85% | 3232 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,840 psi | 87% | 3261 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,955 psi | 85% | 3192 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,199 psi | 80% | 3189 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,095 psi | 76% | 3123 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,859 psi | 66% | 3025 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,116 psi | 88% | 3340 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,449 psi | 87% | 3166 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 55,434 psi | 85% | 3136 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,199 psi | 80% | 3189 fps | 97% |
| Bofors RP7 | <<locked>> | 92% | 58,798 psi | 90% | 3179 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,813 psi | 90% | 3179 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 56,144 psi | 86% | 3156 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 56,869 psi | 87% | 3225 fps | 99% |
| Hodgdon H4350 | <<locked>> | 90% | 56,623 psi | 87% | 3179 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,753 psi | 87% | 3156 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,796 psi | 86% | 3153 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,522 psi | 88% | 3199 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,870 psi | 89% | 3268 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 56% | 1985 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 58,218 psi | 90% | 3166 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,522 psi | 88% | 3136 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,043 psi | 88% | 3136 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,217 psi | 86% | 3117 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 56,159 psi | 86% | 3153 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,898 psi | 88% | 3150 fps | 98.8% |
| IMR 4831 | <<locked>> | 96% | 58,711 psi | 90% | 3219 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,275 psi | 87% | 3173 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 58,407 psi | 90% | 3146 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,623 psi | 87% | 3120 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,494 psi | 90% | 3123 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,014 psi | 88% | 3127 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,594 psi | 87% | 3143 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 58,030 psi | 89% | 3186 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,989 psi | 66% | 2927 fps | 97.2% |
| Norma 201 | <<locked>> | 84% | 58,450 psi | 90% | 3143 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,564 psi | 85% | 3087 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,740 psi | 89% | 3186 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,159 psi | 88% | 3209 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 55,709 psi | 86% | 3284 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 56,869 psi | 87% | 3212 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,201 psi | 85% | 3156 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,898 psi | 86% | 3209 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 58,755 psi | 90% | 3173 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 57% | 2034 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,144 psi | 86% | 3140 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,927 psi | 86% | 3219 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,463 psi | 87% | 3258 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 58,465 psi | 90% | 3251 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,014 psi | 88% | 3284 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,347 psi | 85% | 3087 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,564 psi | 85% | 3133 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,624 psi | 89% | 3179 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,972 psi | 89% | 3241 fps | 98% |
| Rottweil R 907 | <<locked>> | 92% | 58,798 psi | 90% | 3179 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,594 psi | 87% | 3143 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,623 psi | 87% | 3120 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,014 psi | 88% | 3127 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 58,030 psi | 89% | 3186 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,609 psi | 89% | 3199 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,595 psi | 89% | 3153 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,581 psi | 90% | 3176 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,651 psi | 86% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,811 psi | 87% | 3018 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,652 psi | 87% | 3094 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,464 psi | 88% | 3235 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 55,390 psi | 85% | 3012 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,406 psi | 88% | 3136 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,521 psi | 85% | 3127 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,318 psi | 87% | 3215 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 58,624 psi | 90% | 3215 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 82% | 56,246 psi | 87% | 2999 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,666 psi | 86% | 3045 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,260 psi | 87% | 3064 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,145 psi | 88% | 3104 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,376 psi | 85% | 3146 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,763 psi | 78% | 3064 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 86% | 58,247 psi | 90% | 3110 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 58,392 psi | 90% | 3212 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,056 psi | 85% | 3209 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,550 psi | 85% | 3117 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,145 psi | 88% | 3228 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,309 psi | 68% | 3173 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 58,697 psi | 90% | 3179 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,143 psi | 85% | 3146 fps | 97.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 49,313 psi | 76% | 2949 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,921 psi | 74% | 2946 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 36,564 psi | 56% | 2782 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 46,731 psi | 72% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,346 psi | 54% | 2776 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 80% | 52,605 psi | 81% | 3087 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,744 psi | 69% | 2927 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 48,834 psi | 75% | 3081 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,781 psi | 84% | 3091 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,472 psi | 76% | 3153 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,614 psi | 70% | 3012 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,976 psi | 69% | 2949 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,109 psi | 74% | 3025 fps | 99.7% |
| Alliant Reloder-16 | 54.6 gr | 80% | 34,969 psi | 54% | 2795 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,668 psi | 61% | 2936 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,124 psi | 74% | 3068 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,542 psi | 70% | 3058 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,877 psi | 44% | 2631 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,172 psi | 54% | 2825 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 86% | 33,576 psi | 52% | 2828 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,692 psi | 81% | 3104 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 45,020 psi | 69% | 2956 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 45,542 psi | 70% | 3058 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 42,598 psi | 66% | 2874 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,882 psi | 84% | 3117 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,788 psi | 70% | 2969 fps | 98.7% |
| Hodgdon H414 | 58.9 gr | 82% | 40,321 psi | 62% | 2897 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 46,630 psi | 72% | 2992 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 53,229 psi | 82% | 3100 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,329 psi | 50% | 2680 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,966 psi | 77% | 3074 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,583 psi | 66% | 2976 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 41% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,140 psi | 79% | 3048 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,998 psi | 83% | 3084 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,050 psi | 72% | 2966 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,458 psi | 76% | 2992 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 43,366 psi | 67% | 2910 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,481 psi | 64% | 2851 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 34,272 psi | 53% | 2733 fps | 96.2% |
| IMR 4895 | <<locked>> | 80% | 49,371 psi | 76% | 3054 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 54,781 psi | 84% | 3091 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,736 psi | 81% | 3061 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,721 psi | 80% | 3015 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,094 psi | 72% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,711 psi | 60% | 2789 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 39,421 psi | 61% | 2822 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 37,695 psi | 58% | 2808 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 51,329 psi | 79% | 3031 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,040 psi | 80% | 3028 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,442 psi | 73% | 3009 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 46,470 psi | 71% | 3012 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 41,655 psi | 64% | 3002 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,462 psi | 55% | 2776 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 47,993 psi | 74% | 3031 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,941 psi | 57% | 2822 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 54,969 psi | 85% | 3110 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 42% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,876 psi | 71% | 2949 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,243 psi | 80% | 3156 fps | 99.9% |
| ReloadSwiss RS 60 | 58.8 gr | 80% | 42,250 psi | 65% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,302 psi | 54% | 2792 fps | 96.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,606 psi | 53% | 2799 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,791 psi | 75% | 2976 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,337 psi | 65% | 2894 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 94% | 50,459 psi | 78% | 3054 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 47,152 psi | 73% | 3045 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 82% | 42,598 psi | 66% | 2874 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,711 psi | 60% | 2789 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,736 psi | 81% | 3061 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,094 psi | 72% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,421 psi | 61% | 2822 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,859 psi | 67% | 2956 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,708 psi | 83% | 3087 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,372 psi | 79% | 3058 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,330 psi | 81% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,121 psi | 68% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,640 psi | 63% | 2792 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,717 psi | 72% | 3041 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 51,996 psi | 80% | 2959 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,577 psi | 82% | 3081 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,830 psi | 66% | 2897 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 31,850 psi | 49% | 2723 fps | 98.5% |
| Somchem S385 | <<locked>> | 90% | 41,756 psi | 64% | 2900 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 52,924 psi | 81% | 2949 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,095 psi | 76% | 2946 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,385 psi | 76% | 2959 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,901 psi | 63% | 2822 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,869 psi | 57% | 2782 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 96% | 44,048 psi | 68% | 2936 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,877 psi | 74% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,492 psi | 56% | 2782 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 31,807 psi | 49% | 2717 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,318 psi | 56% | 2753 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 40,538 psi | 62% | 2904 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,195 psi | 42% | 2651 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,314 psi | 79% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,877 psi | 74% | 3015 fps | 95.7% |
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 98 powders for 7 mm PRC loaded with the .284 | 127gr | Geco ZERO LG. Alliant Reloder-26 delivers the highest muzzle velocity at 3,340 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,340 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 127.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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 Reloder-16, Hodgdon H414 rank at the top here: for 7 mm PRC with the .284 | 127gr | Geco ZERO LG 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.