Choke Tube Size Chart
|
CONSTRICTION NAME
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CONSTRICTION MEASUREMENT (.000 of an inch)
|
|
Cylinder
|
.000 (Bore Diameter which vary on manufacturer/model)
|
|
Skeet
|
.005
|
|
Improved Cylinder (IC)
|
.010
|
|
Light Modified (LM)
|
.015
|
|
Modified (MOD)
|
.020
|
|
Improved Modified (IM)
|
.025
|
|
Full
|
.030
|
|
Extra Full (EF)
|
.040
|
|
Turkey (TKY)
|
.045+
|
The chart below gives an idea of the effective yardage for most loads:
|
CHOKE
|
LEAD YARDAGE
|
STEEL YARDAGE
|
|
Cylinder
|
0-15
|
0-20
|
|
Skeet
|
5-20
|
10-30
|
|
IC
|
10-25
|
15-30
|
|
LM
|
15-30
|
20-35
|
|
MOD
|
20-35
|
25-45
|
|
IM
|
25-40
|
30-50
|
|
Full
|
30-45
|
40+
|