Thanks for the insight. I load on a Dillon 650, been thinking about getting the Dillon size/trim die anyway so I could eliminate the separate trimming step. I’ll pull the trigger on that and see if it makes a difference.
I thought about possibly an oversized expander. But then the Win brass did not have an issue. Thinking maybe the neck may be thicker on the Hornady brass, thereby being a tighter fit for the expander. Ironically, I’m using Hornady dies on a Dillon 650.
Also I guess I should have specified...
Been loading some 30/30 recently. Had some Hornady brass, 18 of 20 had split necks after only one reload. Anyone else have similar experience? I’m getting around 4 loads with R-P and win brass.
I’m loading 130 gr Speer, 31.0 gr RL-7.