IMR 4320 Load Data: 2,937 Published Loads in 72 Cartridges
Empirical Precision indexes 2,937 published loads for IMR 4320 across 72 bottleneck rifle cartridges from 8 reloading sources, spanning projectile weights from 35 gr to 500 gr.
Published Loads2,937
Cartridges72
Sources8
Bullet Weights35–500 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
- 992 kg/m³
Burn Rate Position
Position #65 of 145 rifle powders on the Empirical Precision relative burn chart (ordered fastest to slowest).
- Nearest Faster
- N150, Power Pro Varmint
- Nearest Slower
- Norma 203B, Accurate 4064
A burn chart is a guide, not load data.
Cartridges Published (72)
Sources Publishing Data (8)
| Publisher | Published Loads |
|---|---|
| Sierra | 1,133 |
| Hornady | 861 |
| Hodgdon | 368 |
| Lyman | 204 |
| Nosler | 183 |
| Berger | 74 |
| Barnes | 58 |
| Speer | 56 |