Winchester Repeating Arms 1300 (Historic Manual) - Manual (Page 21)

WARNING: YOUR WINCHESTER SHOTGUN IS DRILLED
AND TAPPED FOR THE MOUNTING OF BASES AND RINGS
TO ACCOMMODATE AN APPROPRIATE SCOPE OR SIGHT.
ALWAYS USE THE CORRECT BASES FOR THIS SHOTGUN
WITH THE APPROPRIATE LENGTH SCREWS WHICH ARE
AT LEAST
11 ⁄
32
" IN LENGTH.
To mount scope bases on your Model 1300 shotgun,
perform the following steps:
1. MAKE SURE YOUR SHOTGUN IS COMPLETELY
UNLOADED.
Check the magazine, chamber and feed
mechanism to be sure no shells are present. Leave the
action open. Make sure you place your shotgun on a
table or other safe/secure location. Protect the finish
with rags or other padding.
2. You should have two Model 1300-compatible bases and
four screws of at least 11 ⁄
32
" in length.
MAKE SURE YOUR BASES ARE COMPATIBLE
WITH YOUR MODEL 1300.
3. Clean all oil, grease or dirt from the receiver top and
from the scope base parts.
4. Position your shotgun in the upright position with the
top of the receiver upward.
5. Remove all four filler screws from the top of the
receiver using a very small, thin-bladed gunsmithing-
type screwdriver.
6. Pre-position the bases on the receiver top to determine
the best orientation of the bases. Most bases have
transverse grooves cut into them that are offset from
the middle. These are the grooves that the crossbolts
in your scope rings will pass through. The grooves
are offset to allow you to position the bases to fit the
design/length of your scope and the placement of
the scope front to back for proper eye relief. Place
both grooves to the rear, both to the front, or one
in each direction, depending on your scope and
desired position.
7. Once you know which configuration you will use,
insert the screws through the bases and screw them into
the receiver top using the correct wrench or screwdriver
(usually a
3 ⁄
32
" hex wrench).
YOU MUST USE SCREWS WHICH ARE AT LEAST 11 ⁄
32
" IN
LENGTH TO ENSURE PROPER THREAD ENGAGEMENT.
Many gunsmiths find it helpful to use a drop of serviceable
thread locking compound to assure the screws stay tight.
Make sure the compound does not get into the action.
BE CAREFUL TO ASSURE THAT THE THREADS OF EACH
SCREW ENGAGE PROPERLY IN THE THREADS IN THE
RECEIVER TO PREVENT STRIPPING THE THREADS IN THE
ALLOY RECEIVER.
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