It's fine if you're loading and shooting fresh loads, but it will still react to copper and cause weld. Imperial graphite will prevent it. I had 2 batches of loads do it to me last year when I loaded them in probably September and shot some this spring, both were impacting high at distance. Dug into it and learned about weld, tossed a couple loads in the seater and bumped them deeper, every one had a nice audible *crack* to it as the bond broke.I do believe the carbon in the neck is a good lube and helps keep seating depth consistent.
That’s great to know and something I will keep an eye on.It's fine if you're loading and shooting fresh loads, but it will still react to copper and cause weld. Imperial graphite will prevent it. I had 2 batches of loads do it to me last year when I loaded them in probably September and shot some this spring, both were impacting high at distance. Dug into it and learned about weld, tossed a couple loads in the seater and bumped them deeper, every one had a nice audible *crack* to it as the bond broke.