Owner’s Manual 2011

30 31
specifications, including magnum
lead and steel shot loads, sabots and
shotgun slug loads.
Replacement and additional tubes
and wrenches are available from your
FNH USA dealer, or contact the FNH
USA Customer Service Department.
See page 42 for contact information.
18.1. CHOKE TUBE SELECTION
To help you match the correct choke
tube with the shooting situation, the
specialized extended choke tubes included with the SC 1 are inscribed on
the side and top band with the patterns they produce with lead shot.
Optional, non-extended Invector-Plus tubes are inscribed on the side with
the patterns they produce with both lead and steel shot, and also have
notches in the top rim of the tube (Figure 20, page 31). These notches are
a code to allow you to determine the choke designation while the tube is
installed. Rim notches refer specifically to lead shot.
Use the chart on page 31 to cross-reference from lead shot to steel shot,
and determine the appropriate tubes for your ammunition and shooting
situation. Five choke tubes are supplied with your shotgun. The choke tubes
listed are also available as accessories. Remember, Standard Invector and
Invector-Plus tubes are not interchangeable. Invector-Plus tubes are for
FNH USA shotguns with back-bored barrels only. Before removing or
installing tubes, or reading the rim notch code, make sure your shotgun
is completely unloaded.
18.2. CHOKE TUBE REMOVAL
1. Place the “safety” in the on safe position. Always make sure the
shotgun is completely unloaded. Always keep the muzzle pointed
in a safe direction.
FIGURE 19
The SC 1 includes premium extended choke
tubes with constriction identification on the
side and top band.
RIM
ABBREVIATION
RIM
NOTCHES
PATTERN WITH
LEAD SHOT
PATTERN WITH
STEEL SHOT
— EXTENDED** X-FULL TURKEY **
XF — X-FULL *
F I FULL *
LF — LIGHT FULL *
IM II IMP. MODIFIED
FULL
1
M III MODIFIED
FULL
1
LM — LIGHT MODIFIED LIGHT FULL*
IC IIII IMP. CYLINDER MODIFIED
SK IIIII SKEET IMP. CYLINDER
CYL NO NOTCHES CYLINDER CYLINDER
* Not for use with steel shot. Using an over-tight choke constriction with steel shot
will result in an ineffective “blown” pattern.
** Extra Full Turkey, extended with ports. Do not use with steel shot.
1
When more than one choke tube is listed for a given steel shot pattern, use the
more open choke listed for high velocity, larger shot size steel loads.
NO NOTCHES
FIVE NOTCHES
FOUR NOTCHES
THREE NOTCHES
TWO NOTCHES
ONE NOTCH
FIGURE 20