Load Specifications
Bullet:.277 | 115gr | CutEdge LZR
Bullet Manufacturer:Cutting Edge
Bullet Weight:115 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Caliber:.270 Weath. Mag. load data
Case Length (l3):2.549"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:82 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:9.5
Load data in caliber .270 Weath. Mag. with .277 | 115gr | CutEdge LZR 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 70, Hodgdon H414 and Alliant Reloder-16.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 55,593 psi | 87% | 3176 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,682 psi | 90% | 3251 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3215 fps | 99% |
| Accurate 4064 | <<locked>> | 86% | 55,956 psi | 88% | 3235 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,188 psi | 90% | 3350 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3448 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 82% | 55,564 psi | 87% | 3274 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,840 psi | 89% | 3278 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,969 psi | 86% | 3333 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,347 psi | 88% | 3415 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,100 psi | 86% | 3330 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,100 psi | 86% | 3330 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,522 psi | 90% | 3301 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,070 psi | 85% | 3268 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,592 psi | 86% | 3360 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,883 psi | 88% | 3386 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,273 psi | 85% | 3320 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 3314 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,428 psi | 76% | 3248 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,148 psi | 66% | 3143 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3465 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,637 psi | 87% | 3287 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 54,520 psi | 85% | 3258 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 3314 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 54,317 psi | 85% | 3238 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 55,288 psi | 87% | 3278 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,999 psi | 88% | 3346 fps | 99% |
| Hodgdon H4350 | <<locked>> | 90% | 55,912 psi | 88% | 3304 fps | 98% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3323 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,188 psi | 88% | 3287 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,824 psi | 86% | 3271 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,594 psi | 89% | 3323 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,753 psi | 89% | 3389 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,013 psi | 56% | 2073 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,232 psi | 90% | 3284 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,724 psi | 89% | 3261 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,304 psi | 88% | 3261 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,564 psi | 87% | 3238 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 55,332 psi | 87% | 3271 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,144 psi | 88% | 3274 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 53,983 psi | 85% | 3278 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 55,521 psi | 87% | 3301 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,869 psi | 88% | 3241 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,302 psi | 85% | 3189 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,202 psi | 88% | 3251 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,898 psi | 88% | 3264 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 57,188 psi | 90% | 3307 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,221 psi | 66% | 3041 fps | 97.3% |
| Norma 201 | <<locked>> | 84% | 57,595 psi | 90% | 3264 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,679 psi | 86% | 3205 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,058 psi | 89% | 3314 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,188 psi | 88% | 3327 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 54,694 psi | 86% | 3409 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 55,898 psi | 88% | 3333 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,418 psi | 85% | 3281 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,897 psi | 86% | 3330 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 57% | 2119 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,172 psi | 86% | 3258 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,071 psi | 86% | 3343 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,434 psi | 87% | 3383 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,406 psi | 90% | 3373 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,130 psi | 88% | 3409 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,737 psi | 86% | 3212 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,636 psi | 86% | 3255 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,666 psi | 89% | 3301 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3363 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 54,317 psi | 85% | 3238 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,898 psi | 88% | 3264 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,869 psi | 88% | 3241 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,202 psi | 88% | 3251 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,188 psi | 90% | 3307 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,594 psi | 89% | 3323 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,739 psi | 89% | 3274 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,725 psi | 90% | 3297 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,940 psi | 86% | 3136 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,086 psi | 88% | 3136 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,825 psi | 87% | 3209 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,507 psi | 89% | 3360 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 54,534 psi | 85% | 3130 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,579 psi | 89% | 3258 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,607 psi | 86% | 3248 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,347 psi | 87% | 3337 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,954 psi | 85% | 3271 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 55,521 psi | 87% | 3120 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,911 psi | 86% | 3166 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,492 psi | 87% | 3182 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,086 psi | 88% | 3222 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,665 psi | 86% | 3271 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3176 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 86% | 57,464 psi | 90% | 3235 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,348 psi | 90% | 3330 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3333 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,129 psi | 86% | 3392 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,694 psi | 86% | 3235 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,275 psi | 88% | 3353 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,642 psi | 68% | 3294 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,143 psi | 85% | 3245 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3268 fps | 97.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,544 psi | 76% | 3068 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,282 psi | 74% | 3064 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 35,882 psi | 56% | 2894 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 45,963 psi | 72% | 3071 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,722 psi | 54% | 2890 fps | 96.6% |
| Accurate High Country | <<locked>> | 96% | 49,066 psi | 77% | 3301 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 51,996 psi | 81% | 3215 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,106 psi | 69% | 3045 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 92% | 44,860 psi | 70% | 3133 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,733 psi | 76% | 3278 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,020 psi | 71% | 3133 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,020 psi | 71% | 3133 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,295 psi | 69% | 3068 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,456 psi | 74% | 3146 fps | 99.7% |
| Alliant Reloder-16 | 53.2 gr | 80% | 34,403 psi | 54% | 2910 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,015 psi | 61% | 3058 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,469 psi | 70% | 3123 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,643 psi | 70% | 3173 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,355 psi | 44% | 2740 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,563 psi | 54% | 2940 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,895 psi | 52% | 2940 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,837 psi | 81% | 3222 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 44,411 psi | 70% | 3077 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 44,643 psi | 70% | 3173 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 41,858 psi | 66% | 2986 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 45,034 psi | 71% | 3087 fps | 98.7% |
| Hodgdon H414 | 57.4 gr | 82% | 39,682 psi | 62% | 3015 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 45,745 psi | 72% | 3110 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 98% | 52,736 psi | 83% | 3255 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,547 psi | 82% | 3225 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,720 psi | 50% | 2789 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,153 psi | 77% | 3196 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,047 psi | 66% | 3100 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 42% | 1857 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,270 psi | 79% | 3166 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,142 psi | 83% | 3209 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,383 psi | 73% | 3084 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,704 psi | 76% | 3110 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 42,815 psi | 67% | 3025 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,727 psi | 64% | 2963 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 33,518 psi | 53% | 2838 fps | 96.2% |
| IMR 4895 | <<locked>> | 80% | 48,704 psi | 76% | 3179 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 52,156 psi | 82% | 3186 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,082 psi | 80% | 3133 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,369 psi | 73% | 3081 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,130 psi | 60% | 2900 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 38,740 psi | 61% | 2936 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 36,854 psi | 58% | 2917 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 50,604 psi | 79% | 3153 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,372 psi | 81% | 3153 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,833 psi | 73% | 3133 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 45,600 psi | 71% | 3127 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 40,988 psi | 64% | 3123 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,867 psi | 55% | 2894 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,297 psi | 74% | 3153 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,361 psi | 57% | 2940 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 43% | 1903 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,208 psi | 71% | 3068 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,329 psi | 80% | 3281 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,524 psi | 65% | 3123 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,650 psi | 54% | 2907 fps | 96.2% |
| ReloadSwiss RS 70 | 58.2 gr | 80% | 34,098 psi | 53% | 2913 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 48,066 psi | 75% | 3097 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,698 psi | 65% | 3015 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 94% | 49,661 psi | 78% | 3173 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 46,528 psi | 73% | 3169 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 82% | 41,858 psi | 66% | 2986 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,130 psi | 60% | 2900 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,156 psi | 82% | 3186 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,369 psi | 73% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,740 psi | 61% | 2936 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,120 psi | 68% | 3074 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,026 psi | 83% | 3212 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,633 psi | 79% | 3179 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,532 psi | 81% | 3084 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,410 psi | 68% | 2933 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,001 psi | 63% | 2904 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,093 psi | 72% | 3163 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 51,329 psi | 80% | 3081 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,678 psi | 83% | 3196 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,192 psi | 66% | 3015 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 31,285 psi | 49% | 2835 fps | 98.5% |
| Somchem S385 | <<locked>> | 90% | 41,147 psi | 64% | 3018 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 52,112 psi | 82% | 3068 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,211 psi | 76% | 3061 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,747 psi | 76% | 3074 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,321 psi | 63% | 2940 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,289 psi | 57% | 2897 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 96% | 43,381 psi | 68% | 3051 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 47,123 psi | 74% | 3064 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,795 psi | 56% | 2894 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 31,096 psi | 49% | 2825 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 98% | 51,401 psi | 81% | 3323 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,665 psi | 56% | 2861 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 39,885 psi | 63% | 3018 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,716 psi | 42% | 2759 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,618 psi | 79% | 3186 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,007 psi | 74% | 3130 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 .270 Weath. Mag. loaded with the .277 | 115gr | CutEdge LZR. Alliant Reloder-26 delivers the highest muzzle velocity at 3,465 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,465 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 (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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 70, Hodgdon H414, Alliant Reloder-16 rank at the top here: for .270 Weath. Mag. with the .277 | 115gr | CutEdge LZR 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.