Winchester Repeating Arms Supreme (Historic Manual) - Manual (Page 25)

NOT CONTAIN ANY SHELLS.
2. Open the action fully downward, and place the “safety”
in the “on safe” position.
3. Use the Invector Plus wrench to loosen the tube,
turning it counterclockwise. Finger twist the tube the
rest of the way out of the barrel.
T UBE I NSTALLATION —
1. UNLOAD YOUR SUPREME SHOTGUN FULLY.
INSPECT THE CHAMBERS TO MAKE SURE THEY DO
NOT CONTAIN ANY SHELLS.
2. Open the action fully downward, and place the “safety”
in the “on safe” position.
3. Before installing a tube, check the internal choke tube
threads in the muzzle, as well as the threads on the
Invector-Plus choke tube to be sure they are clean.
Lightly oil the threads with a high quality light weight oil.
4. Using your fingers, screw the appropriate tube into the
muzzle end of the barrel, tapered end first, notched end
outward. When it becomes finger tight, use the Invector-
Plus choke tube wrench to firmly seat the tube.
THE INVECTOR PLUS CHOKE TUBES SHOULD BE PERI-
ODICALLY CHECKED TO ASSURE THAT THEY ARE
TIGHT AND FIRMLY SEATED. BEFORE CHECKING,
FOLLOW THE SAFETY GUIDELINES OUTLINED ABOVE.
S ELECTING THE C ORRECT I NVECTOR -P LUS T UBE —
The Invector-Plus choke system is fully compatible with
factory lead, tungsten, bismuth or steel shot loads. The
conversion chart includes lead, tungsten, bismuth and
steel shot information. Lead and steel shot perform differ-
ently in tubes with the same choke constriction. For this
reason, both lead and steel designations have proven
necessary. In fact, even larger steel shot diameters result
in different patterns than smaller steel shot sizes. Each
designation is inscribed on each choke tube.
To help you choose the correct choke tube for each target
shooting and hunting situation, all Invector-Plus choke
tubes are inscribed on the side with abbreviations for the
patterns they produce with both lead and steel shot.
Each tube also features identification notches located on
the top rim of each tube (see Figure 18). These notches
are a code to allow you to determine the choke designa-
tion while the tube is installed. Rim notches refer specifi-
cally to lead shot. You will need to use the chart below to
cross-reference from lead to steel, and determine the
appropriate tubes for your ammunition and
hunting/shooting situation.
It is helpful to note that Bismuth shot responds similarly
to lead shot and tungsten shot responds more like steel
shot.
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