IMR 4227 Load Data: 650 Published Loads in 14 Cartridges
Empirical Precision indexes 650 published loads for IMR 4227 across 14 bottleneck rifle cartridges from 7 reloading sources, spanning projectile weights from 30 gr to 400 gr.
Published Loads650
Cartridges14
Sources7
Bullet Weights30–400 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
- 880 kg/m³
Burn Rate Position
Position #14 of 145 rifle powders on the Empirical Precision relative burn chart (ordered fastest to slowest).
- Nearest Faster
- Accurate No. 11FS, H110
- Nearest Slower
- Power Pro 300-MP, Lil'Gun
A burn chart is a guide, not load data.
Cartridges Published (14)
| Cartridge | Published Loads |
|---|---|
| 300 Blackout | 355 |
| 218 Bee | 96 |
| 22 Hornet | 90 |
| 22 K Hornet | 32 |
| 458 SOCOM | 16 |
| 6.8mm Remington SPC | 15 |
| 300 HAM'R | 12 |
| 256 Winchester Magnum | 10 |
| 25-20 Winchester | 9 |
| 222 Remington | 6 |
| 6mm BR | 3 |
| 338 ARC | 3 |
| 222 Remington Magnum | 2 |
| 338 Federal | 1 |
Sources Publishing Data (7)
| Publisher | Published Loads |
|---|---|
| Sierra | 285 |
| Hornady | 211 |
| Hodgdon | 53 |
| Lyman | 52 |
| Speer | 30 |
| Nosler | 15 |
| Barnes | 4 |