Thread: Neck Tension Issue... I think

Not the issue here but it is possible under the right conditions for bullets to "cold solder" themselves to the neck and that does cause pressure.
It was first noticed in the 20s with batches of experimental 3006 ammunition. It was known that tin not only prevented copper fouling in artillery pieces it actually removed it.
Tin washed projectiles were loaded to see if this worked in rifles and inital trials were good. Problems were encountered with stored ammunition producing excessive pressure, initally overcharging was suspected but pulling rounds showed that not to be true some had soldered to the case so the idea was dropped. The cfe powders incorporate a minute amount of metallic tin in the formula and that is sucessful.
Sorry it's a little off track but I thought it interesting