Winchester Repeating Arms BOSS (Historic Manual) - Manual (Page 9)

To check for adequate clearance, it is recommended that
a piece of paper, folded once, be able to pass between the
barrel and stock without any interference. If the barrel is
not free-floating, take your rifle to a competent gunsmith
or send it to U.S. Repeating Arms Co. Service Center.
Special bedding of the action on your BOSS equipped
Model 70 rifle is installed at the factory and aids greatly
in improving accuracy. If you have any modifications
done to your stock, make sure the bedding has not been
altered. If the bedding on your rifle has been modified
send your rifle to a U.S. Repeating Arms Co. Service
Center.
SPECIAL INSTRUCTIONS
ON CLEANING THE R IFLE BORE
To maintain utmost accuracy from your BOSS equipped
rifle, or any rifle, extensive testing has proven that the
rifle bore must be cleaned every 25 to 30 rounds.
CAUTION: BEFORE CLEANING YOUR RIFLE
MAKE CERTAIN YOUR RIFLE IS FULLY
UNLOADED, THE MAGAZINE IS
UNLOADED / REMOVED, THE SAFETY IS IN
THE “ON SAFE” POSITION AND YOUR RIFLE
IS POINTED IN A SAFE DIRECTION.
We highly recommend that your rifle be cleaned with the
BOSS installed on your barrel. Remove the bolt and clean
from the breech end.
Modern cartridge jackets are made mainly of copper and
zinc. These metals glide easier and increase barrel life, how-
ever, residues from copper and zinc also stick to the barrel
and require more frequent cleaning. As top benchrest shoot-
ers have known for decades, copper solvent is the key to
cleaning a barrel for optimum accuracy. The recommended
cleaning procedure is as follows:
1. Clean the bore with a good powder solvent to remove all
traces of powder residue. Performing this step before the
application of a copper solvent will prevent the bore from
refouling with copper so readily.
2. Swab the bore with a good copper solvent using the
manufacturer’s recommended procedure. After neutralizing
the solvent, generally with oil, it is important to swab the
bore dry. Swabbing the bore dry will reduce copper buildup.
NOTE: DO NOT USE SOLVENTS OF DIFFERENT
MANUFACTURERS CONCURRENTLY. A CHEMI-
CAL REACTION MAY RESULT THAT WILL COR-
RODE EVEN STAINLESS STEEL BARRELS. IT IS
ER’S RECOMMENDATIONS EXACTLY.
IMPORTANT TO FOLLOW THE MANUFACTUR-
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