the video seems long and rather complicated but its quite informative
btw its one reason you should carefully clean your rifle after every use,
and
that does not mean just soaking it marginally with a bit of wd40,or similar spray oil.
corrosive primer salts can be washed out with the simple process of pouring a 1/2 gallon of hot water, poured over effected surfaced wiped and repeat several times,
and then dried ,properly brushed and oil repeatedly,
corrosive primer salts dissolve in hot water, and if not removed,
embed in metal surfaces if not removed,
and will absorb moisture from the air rapidly if left uncleaned,
with a few drops of dawn dish washing detergent , in that 1/2 gallon of hot water poured ,
over and through the barrel and action,
if you use 1 quart of household ammonia mixed with the hot water, poured through the bore and rifles parts fouled with the powder fouling,
it tends to remove copper fouling much faster also along with the corrosive primer salts, but don,t get it on the stock or blueing , and rinse and dry and oil immediately
then cleaning carefully.
obviously, all moisture and expended powder residue must be cleaned and the fire arm carefully cleaned and oiled before storage
http://garage.grumpysperformance.co...-and-its-effect-on-accuracy.10041/#post-88028
http://garage.grumpysperformance.com/index.php?threads/interesting-firearms-rust-prevention.10343/