Thanks for the reply. If it is the sizing is there a way to salvage the brass or is it toast? I will order a new die and the gauge. Going to be a learning curve with that.
I am using an older Lee die as well as a factory crimp die
Here is a pic of loaded round compared to a milsurp round. Something does look amis. All cases were trimmed to length after sizing. The length of the neck is the same but the transition from shoulder to neck isn't as sharp.
Can't shoot the milsurp because it is was too hot causing difficult extraction in this gun and a bolt gun.
Don't have any factory rounds to shoot. May go buy a box to try it out.