I bought a 6oz spray can of Barricade and it took me about 12 years to use it up on my loading dies.
I have more than 100 sets of dies. Each time a set is used I clean them out and give them a tiny shot of Barricade inside and out. Then store them. When I use them the next time I give them a fresh shot of Barricade internally and wipe out the interior with an old scrap of T shirt. Result is many years of zero rust on my dies.