Load Specifications
Load data in caliber .270 WSM with .277 | 107gr | Peregrine Glider GRM bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, 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.
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>> | 82% | 54,969 psi | 86% | 3192 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,723 psi | 86% | 3212 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,852 psi | 83% | 3255 fps | 98.2% |
| Accurate 4064 | <<locked>> | 84% | 55,042 psi | 86% | 3241 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,621 psi | 86% | 3323 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 82% | 56,333 psi | 88% | 3310 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 57,305 psi | 90% | 3307 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 55,172 psi | 86% | 3343 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,333 psi | 88% | 3438 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 57,116 psi | 90% | 3320 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,781 psi | 86% | 3281 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,042 psi | 86% | 3304 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,520 psi | 85% | 3376 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,115 psi | 88% | 3415 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,549 psi | 85% | 3333 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,849 psi | 77% | 3271 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,091 psi | 68% | 3159 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,101 psi | 88% | 3481 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,985 psi | 88% | 3314 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 56,101 psi | 88% | 3307 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 55,143 psi | 86% | 3261 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 86% | 56,246 psi | 88% | 3310 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 92% | 56,275 psi | 88% | 3366 fps | 98% |
| Hodgdon H4350 | <<locked>> | 90% | 56,231 psi | 88% | 3320 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 82% | 56,956 psi | 89% | 3320 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,969 psi | 86% | 3297 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,942 psi | 89% | 3356 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,594 psi | 89% | 3402 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 57% | 2106 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,595 psi | 90% | 3317 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,290 psi | 90% | 3304 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,811 psi | 89% | 3291 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,144 psi | 88% | 3261 fps | 97.8% |
| IMR 4350 | <<locked>> | 94% | 55,535 psi | 87% | 3287 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,449 psi | 88% | 3291 fps | 97.8% |
| IMR 4831 | <<locked>> | 94% | 54,955 psi | 86% | 3314 fps | 99.6% |
| IMR 4895 | <<locked>> | 84% | 56,362 psi | 88% | 3337 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 57,043 psi | 89% | 3284 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,984 psi | 86% | 3222 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 57,377 psi | 90% | 3291 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,826 psi | 89% | 3294 fps | 98.9% |
| Lovex S070 | <<locked>> | 92% | 54,868 psi | 86% | 3281 fps | 97.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,266 psi | 69% | 3087 fps | 96.3% |
| Norma 201 | <<locked>> | 82% | 55,521 psi | 87% | 3255 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,825 psi | 87% | 3251 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,638 psi | 90% | 3346 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,318 psi | 88% | 3340 fps | 96.1% |
| Norma MRPᴾ | <<locked>> | 100% | 54,926 psi | 86% | 3422 fps | 97.8% |
| Norma URP | <<locked>> | 94% | 56,492 psi | 89% | 3360 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 54,882 psi | 86% | 3310 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 55,187 psi | 86% | 3350 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 58% | 2152 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,869 psi | 88% | 3284 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,709 psi | 87% | 3376 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,593 psi | 87% | 3415 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,172 psi | 85% | 3340 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,318 psi | 88% | 3425 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 84% | 56,115 psi | 88% | 3255 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,898 psi | 88% | 3297 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3383 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 90% | 55,143 psi | 86% | 3261 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,826 psi | 89% | 3294 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,043 psi | 89% | 3284 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,377 psi | 90% | 3291 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,868 psi | 86% | 3281 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,000 psi | 89% | 3350 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,766 psi | 86% | 3271 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,854 psi | 88% | 3179 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,652 psi | 89% | 3176 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,869 psi | 89% | 3238 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3373 fps | 96.7% |
| Somchem S335 | <<locked>> | 82% | 55,840 psi | 88% | 3176 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,000 psi | 89% | 3287 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,796 psi | 87% | 3287 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,564 psi | 87% | 3369 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,824 psi | 86% | 3297 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 82% | 56,144 psi | 88% | 3159 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,159 psi | 88% | 3215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,246 psi | 88% | 3225 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,116 psi | 90% | 3261 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,998 psi | 86% | 3294 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 84% | 54,592 psi | 86% | 3215 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,563 psi | 86% | 3304 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,897 psi | 86% | 3366 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,723 psi | 86% | 3258 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,478 psi | 89% | 3369 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,643 psi | 70% | 3320 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,650 psi | 86% | 3274 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3278 fps | 95.9% |
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% | 51,706 psi | 81% | 3136 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,472 psi | 76% | 3094 fps | 95.4% |
| Accurate 3100 | <<locked>> | 92% | 40,640 psi | 64% | 3005 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,863 psi | 77% | 3140 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,956 psi | 58% | 2946 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 52,881 psi | 83% | 3248 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 45,107 psi | 71% | 3077 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 96% | 51,793 psi | 81% | 3278 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,095 psi | 77% | 3297 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,563 psi | 84% | 3261 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,730 psi | 72% | 3110 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,588 psi | 76% | 3182 fps | 99.2% |
| Alliant Reloder-16 | 52 gr | 80% | 35,650 psi | 56% | 2943 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,030 psi | 63% | 3087 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,097 psi | 80% | 3264 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 32,126 psi | 50% | 2854 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 40,625 psi | 64% | 3097 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 37,144 psi | 58% | 3054 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,547 psi | 82% | 3255 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 46,282 psi | 73% | 3123 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 46,180 psi | 72% | 3084 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 46,514 psi | 73% | 3123 fps | 97.9% |
| Hodgdon H414 | 57.6 gr | 84% | 43,700 psi | 68% | 3114 fps | 95% |
| Hodgdon H4350 | <<locked>> | 86% | 49,676 psi | 78% | 3199 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 53,417 psi | 84% | 3258 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,417 psi | 52% | 2835 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,922 psi | 78% | 3232 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 46,050 psi | 72% | 3189 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 43% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,111 psi | 80% | 3202 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 53,809 psi | 84% | 3248 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,427 psi | 74% | 3117 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,661 psi | 78% | 3140 fps | 96.5% |
| IMR 4350 | <<locked>> | 88% | 46,499 psi | 73% | 3110 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,440 psi | 70% | 3051 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 35,476 psi | 56% | 2890 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 49,821 psi | 78% | 3215 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 53,650 psi | 84% | 3232 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,866 psi | 81% | 3166 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 47,979 psi | 75% | 3127 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 40,030 psi | 63% | 2946 fps | 95.3% |
| Lovex S070 | <<locked>> | 84% | 43,163 psi | 68% | 3038 fps | 95% |
| Lovex S071 | <<locked>> | 98% | 41,655 psi | 65% | 3031 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,330 psi | 82% | 3199 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,591 psi | 82% | 3199 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,979 psi | 75% | 3166 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 52,939 psi | 83% | 3278 fps | 95.4% |
| Norma MRP | <<locked>> | 94% | 44,947 psi | 70% | 3212 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,535 psi | 57% | 2936 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,935 psi | 75% | 3182 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 42,743 psi | 67% | 3097 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 44% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,412 psi | 73% | 3100 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,127 psi | 82% | 3310 fps | 99.5% |
| ReloadSwiss RS 60 | 56 gr | 80% | 42,366 psi | 66% | 3156 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,376 psi | 57% | 2956 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 40,495 psi | 63% | 3084 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 49,879 psi | 78% | 3143 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 43,787 psi | 69% | 3064 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 96% | 50,256 psi | 79% | 3248 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 84% | 46,180 psi | 72% | 3084 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,030 psi | 63% | 2946 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,650 psi | 84% | 3232 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,979 psi | 75% | 3127 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 43,163 psi | 68% | 3038 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,193 psi | 69% | 3110 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,430 psi | 81% | 3212 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,562 psi | 82% | 3123 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,512 psi | 70% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 44,309 psi | 69% | 2999 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,792 psi | 78% | 3241 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,692 psi | 83% | 3127 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,505 psi | 84% | 3232 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 43,961 psi | 69% | 3064 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 33,069 psi | 52% | 2887 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 48,356 psi | 76% | 3176 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 52,924 psi | 83% | 3110 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,632 psi | 78% | 3110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,908 psi | 78% | 3120 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,959 psi | 66% | 2986 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 37,695 psi | 59% | 2933 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 48,312 psi | 76% | 3107 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,492 psi | 59% | 2936 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 84% | 33,228 psi | 52% | 2887 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,086 psi | 58% | 2900 fps | 98% |
| Winchester 760 | <<locked>> | 84% | 43,700 psi | 68% | 3114 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 88% | 30,676 psi | 48% | 2887 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,285 psi | 80% | 3215 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,937 psi | 80% | 3212 fps | 95% |
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 107 powders for .270 WSM loaded with the .277 | 107gr | Peregrine Glider GRM. Alliant Reloder-26 delivers the highest muzzle velocity at 3,481 fps; across all powders the maximum-charge window runs from 2,106 fps to 3,481 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 107.0 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, Accurate MAGPRO 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, Hodgdon H414, Alliant Reloder-16 rank at the top here: for .270 WSM with the .277 | 107gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.