When my magnum gets wet I will take the forearm and magazine spring out of the gun and use my air compressor to blow the water from the reciever. Pay close attention where the stock slides on to the reciever and around each screw. (water likes to hide there!) I will then pull the bolt back and spray gun scrubber into the reciever with the gun pointing down. After that lubricate the rails in the reciever and reinsert the magazine spring. I will usually leave the forearm off of the gun and leave it in the corner of the hunting room upside down for a couple of days just incase there was any water or i got too much oil in the reciever. After a couple of days look into the bolt slot with a flashlight to see if there is any water or too much oil. If not put everything back together and you are done. This is probably a lot more overkill than these guns were treated years ago, but it makes me feel better!