I used Break Free when it first came out and the military finally caught on to it as well and they now issue the stuff. But technology advances and break free is no longer the high speed low drag stuff to have in a high grit environment like Iraq or our other sandbox adventure zones. Break Free is fine for domestic use on a self defense gun, as long as YOU'RE not in a high grit zone yourself!
I started using Break-free years ago. I have had no problems, as long as my firearm isn't getting dusty (some days around here are just that way....). It is about 5 above outside, and it will get colder before spring.
I just finished cautioning aa friend to thoroughly clean the bolt of his SKS before taking it outside to play, as added insurance against slam fires.
I'd like to try the Miltec lube. Any links?