I got these test barrels in a couple weeks ago and spent a few hours cleaning them out to make sure they were in good shape and that there was no rust inside or outside on them.
Two of the barrels were treated with Montana x treme Gun Oil Inside and Outside.
One other barrel was treated with Birchwood Casey Barricade.
After cleaning and degreasing them, they were lightly oiled inside and out. I did leave a good amount of oil on the externals when i used the Montana x treme gun oil. Barricade i sprayed on and it dried over time and left a smooth finish on the barrel.
Setting them outside for 2 weeks, they got snowed one Twice, completely iced over and brought inside the house like you would during a hunting situation and then taken back outside the next morning.
Here are the results:
Bottom to Top
Montana X treme gun oil
Birchwood Casey Barricade
Monana X treme gun oil
Close up
Montana Xtreme gun oil TOP
Birchwood Casey Barricade BOTTOM
Barricade Close Up.
With the Barricade protected barrel the ONLY rust spot is just above the Hinge pin hole. Its a very light yellow - orange color. I looked this entire barrel over and that was ALL i could find on it.
The stainless steel barrel really surprised me at how much rust developed on it. The main portion of the barrel had only one small speck of rust.
The blued barrel coated with Montana X treme gun oil showed a great deal of rusting in multiple area's throughout the length of the barrel. After cleaning the rust off, some deeper rusty areas did leave behind discoloring in the bluing and minor pitting.
Cleaning the Bores, i discovered that all oil's had protected the Inside perfectly and there was no discoloring on the cleaning patches. That's where the protection matters but i also prefer the outside of my barrel to look good.
I now have the rusty " Now freshly cleaned!" Stainless steel barrel coated with Birchwood Casey Barricade and will let it sit outside again for 2 weeks to see if any rust develops.