|
Tubing sizes for improvised firearm barrels from .22 Rimfire to 12 gauge
shotgun. Seamless Mechanical Tube (SMT)/Seamless Hydraulic Tube (SHT)
|
| Calibre |
Tube size required (mm) |
Bore dia. (mm) |
| |
|
|
| .22 Rimfire |
9.53 x 2.03 SMT |
5.47 |
| |
|
|
| |
9.52 x 2.03 SHT |
5.46 |
| |
|
|
| .25 ACP |
12.70 x 3.25 SMT |
6.20 |
| |
|
|
| .32 ACP |
14.29 x 3.25 SMT |
7.79 |
| |
|
|
| .38/.357 |
15.88 x 3.25 SMT/SHT |
9.38 |
| |
|
|
| |
19.05 x 4.88 SMT |
9.29 |
| |
|
|
| 9mm/.380 |
14.29 x 2.64 SMT |
9.01 |
| |
|
|
| |
14.00 x 2.50 SHT |
9.00 |
| |
|
|
| |
15.00 x 3.00 SHT |
9.00 |
| |
|
|
| .44/.410 |
20.64 x 4.88 SMT |
10.88 |
| |
|
|
| |
19.05 x 4.06 SMT |
10.93 |
| |
|
|
| .45 ACP |
17.46 x 2.95 SHT |
11.56 |
| |
|
|
| 12 Gauge |
26.99 x 4.06 SMT |
18.87 |
| |
|
|
| |
28.58 x 4.06 SMT |
20.46 |
| |
|
|
| |
28.00 x 4.00 SHT |
20.00 |
| |
|
|
| |
30.00 x 5.00 SHT |
20.00 |
All the tube sizes listed here offer an excellent "Bullet to Bore" fit.
All will require chambering with the appropriate calibre chamber reamer.
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