I partially pulled 50 .308 bullets that I have had loaded for at least 2 years. No sign of cold welding. All broke loose smoothly with the same amount of force as far as I could tell. I pulled a couple, re-coated them, seated and then removed them again. The force felt the same as the 2 year old loads. These were all Hornady .308 / 208 grain EDL Match bullets in new Hornady cases, .002" interference fit, and I coated them all with Imperial Dry Lube graphite powder. I also spot checked about 20 Hornady .308 / 168 grain bullets in Lapua cases that have been fired a couple times. They all released easily too and had been loaded over 2 years ago too. I've had a few rounds in the past that took quite a bit of force to get them to break loose that weren't coated but were in fired cases with some carbon left in the necks. Not all the ones in a batch but probably 1 out of every 10. Never would have known until I pulled them to change the powder loads. I noticed I had a few that showed slight pressure signs (ejector marks) even though everything else was the same and down to within .02 grain of powder and seated to within .001".