ckel.
However, due to pitting, the presence of dust, other abrasives,
or to accumulation, metal fouling may occur in clearly visible
flakes or patches of much greater thickness, much more difficult
to remove.

(c) In cleaning the bore after firing it is well to proceed as
follows: Swab out the bore with soda solution (subparagraph j)
to remove powder fouling. A convenient method is to insert the
muzzle of the rifle into the can containing the soda solution
and, with the cleaning rod inserted from the breech, pump the
barrel full a few times. Remove and dry with a couple of patches.
Examine the bore to see that there are in evidence no patches of
metal fouling which, if present, can be readily detected by the
naked eye, then swab out with the swabbing solution--a dilute
metal-fouling solution (subparagraph j). The amount of swabbing
required with the swabbing solution can be determined only by
experience, assisted by the color of the patches. Swabbing should
be continued, however, as long as the wiping patch is discolored
by a bluish-green stain. Normally a couple of minutes' work is
sufficient. Dry thoroughly and oil.

(d) The proper method of oiling a barrel is as follows: Wipe the
cleaning roll dry; select a clean patch and thoroughly saturate
it with sperm oil or warmed cosmic, being sure that the cosmic
has penetrated the patch; scrub the bore with the patch, finally
drawing the patch smoothly from the muzzle to the breech, allowing
the cleaning rod to turn with the rifling. The bore will be found
now to be smooth and bright so that any subsequent rust and sweating
can be easily detected by inspection.

(e) If patches of metal fouling are seen upon visual inspection
of the bore the standard metal fouling solution prepared as
hereinafter prescribed must be used. After scrubbing out with
the soda solution, plug the bore from the breech with a cork
at the front end of the chamber or where the rifling begins.
Slip a 2-inch section of rubber hose over the muzzle down to the
sight and fill with the standard solution to at least one-half
inch above the muzzle of the barrel. Let it stand for 30 minutes,
pour out the standard solution, remove hose and breech plug,
and swab out thoroughly with soda solution to neutralize and
remove all trace of ammonia and powder fouling. Wipe the barrel
clean, dry, and oil. With few exceptions, one application is
sufficient, but if all fouling is not removed, as determined by
careful