I was experiencing some oddities when testing some cast loads in my 308 Win.
When I inspected the cases I noticed some lead sticking to the necks of the cases. I'm at a loss, I can't think of what conditions would cause lead to blow back and adhere to the outside of the neck. I didn't notice it a first, but the necks had a little bit of discoloration so I looked at them with my eye loop. Tiny balls and streaks of lead, one case even had a bit of lead on the shoulder.
I'll not load that combo again, but I'd like to know what conditions can cause this? Has anyone else ever experienced this?
- inconsistent report, some louder than others
- some rounds a bit harder to chamber
- some sticky extraction (probably the lead on the case neck?)