IMR 7977 Load Data: 2,150 Published Loads in 45 Cartridges
Empirical Precision indexes 2,150 published loads for IMR 7977 across 45 bottleneck rifle cartridges from 8 reloading sources, spanning projectile weights from 70 gr to 350 gr.
Published Loads2,150
Cartridges45
Sources8
Bullet Weights70–350 gr
Always start low and verify against the original published source before loading.
Powder Data Sheet
- Manufacturer
- IMR
- Grain Type
- Single-perforated Extruded
- Bulk Density
- 920 kg/m³
Burn Rate Position
Position #124 of 145 rifle powders on the Empirical Precision relative burn chart (ordered fastest to slowest).
- Nearest Faster
- Reloder 26, Supreme 780
- Nearest Slower
- Reloder 25, N565
A burn chart is a guide, not load data.
Cartridges Published (45)
Sources Publishing Data (8)
| Publisher | Published Loads |
|---|---|
| Sierra | 1,145 |
| Hodgdon | 432 |
| Hornady | 344 |
| Nosler | 93 |
| Lyman | 54 |
| Speer | 40 |
| Barnes | 34 |
| Federal | 8 |