It will begin with small amounts of surface rust which you can sand off and your ammo will still fire but even this may.
Keeping guns in attic.
What you should do if the garage is the only place for the gun safe.
In addition to gel capsules potentially melting in the heat some medications may lose their efficacy when stored at high temperatures.
Humidity is even more dangerous to your ammunition than temperature swings moisture is corrosive to metal.
While keeping prescription refills or extra otc medication in your attic may seem like a smart way to keep them out the reach of children doing so can cause a whole lot of problems.
I realize that the cold probably wont be a problem but will the heat effect the guns ammo at all.
If you do need to keep the gun safe in the garage you can take some precautions to prevent the above scenarios from taking place.
But if you have an attic with plenty of space you can use that too.
Cover them with insulation or such to conceal them.
To keep your stored ammo organized stack the original boxes on shelves on the floor or in a large mtm plastic box.
Closed to the outside air attic.
Open to the outside air attic.
However heat rises and air circulation isn t typically ideal in an attic space which means temperatures inside of an attic frequently reach three digits during the summer.
I fire mostly 9mm and 45 acp handguns but i also use 223 and 308 rifles.
Keeping guns in attic.
Cosmoline is one of the best.
It gets up to 100f sometimes and its probably well over that in the attic.
If you put the guns in the attic do two things.
Quality gun care products will keep your guns pristine for many years.
Bad idea to store guns here they will deteroriate over time.
Gun metal should be coated in a preservative that won t drip or run off.
Meanwhile the 12 gauge shotgun is my go to gun but i also have the 357 magnum and we all need a 22 plinker.
I live in nc it gets hot in the summer and cold in the winter especially in the attic.
That means cleaning the exterior with a quality cleaner and a lubricant.
To be thorough however requires that we sit down at the bench and clean and lubricate our guns properly.
Put them in a moisture sealed container with silica gel desiccant.
Then swabbing the bore and lubricating it properly.
In 1992 i stored my firearms in my attic during the summer west central georgia.
And ammo s is made of metal casings primers and the bullet hence moisture exposure will eventually rust your ammo.
Preferably invest in high quality climate controlled gun safe made with durable steel and locks that has a vault design.