Re: UPDATE
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mammal</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: atreeman</div><div class="ubbcode-body">It might be worth bearing in mind that the pitting is probably induced by the products of combustion flowing back into the barrel if the rifle is stored with the mod on. No one has mentioned whether the rifle is stored with the moderator on. I've seen a good few barrels corroded badly via this mechanism and one barrel (on a steyr scout so no great loss) that had the moderator rusted solid onto it as it was never removed after shooting.
I now always remove a moderator after shooting and replace with thread protector. Then spray some light oil into the mod to prevent corrosion on return home and leave to dry in warm place.
1st round is sometimes smoky but as long as you don't overdo it (and remember LIGHT spray oil!) then no change in zero and a hapy rustless moderator.
Regards
Gareth</div></div> Moderator? When are you Brits gonna learn proper English?
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They might not know english but they know what they are talking about.
The OP lives in a humid and wet environment. Shoot with the can on it gets hot as it cools off the air will condense and form moisture. Storing the gun with the can on is not a good idea.
Take the can off when you store the weapon. If you live in a humid area store the weapon in a safe with a dehumidifier or in a warm dry place, if you can't, clean the weapon after every use and push an oil patch down the barrel.
Cleaning or not cleaning is not only a consideration for accuracy but what type of conditions the weapon is going to be subject to. Some of my rifles go many rounds between cleaning unless something makes me or require me to do it sooner, like it getting wet.