Ammunition
The M1 utilized separate loading, bagged charge ammunition. Only high explosive projectile was available.
The projectile could be fired with propelling charge M7 (normal) at reduced velocity or with propelling charge M8 (super) to achieve full velocity. The dummy propelling charge M6 simulated the M8 charge. The velocity and range data in the table below is for the M8 charge.
| Available ammunition. | |||||
| Type | Model | Projectile weight, kg | Filler | Muzzle velocity, m/s | Range, m |
| HE | HE M65 Shell | 24.9 | TNT, 2.04 kg or Amatol 50/50, 1.85 kg or Trimonite, 2.10 kg |
693 | 19,317 |
| Dummy | Dummy M8 Projectile | - | - | ||
| Propelling charges | ||
| Model | Weight, complete, kg | Components |
| M7 (normal) | 2.95 | Single section |
| M8 (super) | 5.08 | Base charge and increment |
| M6 (dummy) | 5.40 | Base charge and increment |
| Concrete penetration, mm | ||||
| Ammunition \ Distance, m | 0 | 914 | 4,572 | 9,144 |
| HE M65 Shell (meet angle 0°) | 1,158 | 1,067 | 640 | 366 |
| Different methods of measurement were used in different countries / periods. Therefore, direct comparison is often impossible. | ||||
Read more about this topic: 4.5 Inch Gun M1